* [linux-lvm] performance comparison soft-hardware RAID + LVM: bad
@ 2002-10-15 17:39 Ron Arts
2002-10-16 3:28 ` Heinz J . Mauelshagen
2002-10-16 3:57 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Jon Bendtsen
0 siblings, 2 replies; 6+ messages in thread
From: Ron Arts @ 2002-10-15 17:39 UTC (permalink / raw)
To: linux-lvm
[-- Attachment #1: Type: text/plain, Size: 2962 bytes --]
Hello,
I am interested in performance for hardware/software RAID
in combination with LVM
So I took a server (Dual Xeon 2.4GHz, 1Gb RAM), a RAID adapter,
some identical SCSI disks and configured it with several of these
options (using RH 8.0) and ran a few bonnie++ benchmarks.
Results are below. Anyone care to comment? Especially LVM performance
disappointed here.
LVM machine setup:
2 18Gb disks. I created 3 partitions on both disks, 128Mb, 512Mb and 17Gb
Equal partitions were combined into RAID-1 devices (md driver).
First md device mounted on /boot, second for swapfile, and third
as basis for LVM
Out of the volume group four LV were created and mounted as follows:
[root@nbs-126 root]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/vg0/root 4225092 1293064 2717400 33% /
/dev/md0 124323 11517 106387 10% /boot
/dev/vg0/home 4225092 32828 3977636 1% /home
none 514996 0 514996 0% /dev/shm
/dev/vg0/var 4225092 51720 3958744 2% /var
/dev/vg0/mysql 16513960 32828 15642272 1% /var/lib/mysql
Is there a reason for the performance degradation I saw with LVM?
Regards,
Ron Arts
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
nbs-126.offic 2008M 24005 99 66015 49 16148 7 27430 98 86915 15 369.0 1 single disk
nbs-126.offic 2G 23422 99 70919 58 23800 11 25289 86 101485 17 433.4 1 s/w RAID-1
nbs-126.offic 2G 8152 99 49897 94 23092 27 9122 92 78056 38 331.1 2 s/w RAID-1 + LVM
nbs-126.offic 4032M 19695 99 44056 42 14179 9 21526 94 86450 16 344.3 1 h/w RAID-1
nbs-126.offic 4032M 19916 99 24033 22 13343 9 22794 99 111662 30 388.5 1 h/w RAID-5
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
nbs-126.office.n 16 2481 99 +++++ +++ +++++ +++ 2424 99 +++++ +++ 5508 98 single disk
nbs-126.office.n 16 2530 99 +++++ +++ +++++ +++ 2437 99 +++++ +++ 6062 100 s/w RAID-1 soft
nbs-126.office.n 16 800 99 +++++ +++ 12848 98 807 99 +++++ +++ 2591 99 s/w RAID-1 + LVM
nbs-126.office.n 16 2138 98 +++++ +++ 31126 98 2200 99 +++++ +++ 5322 98 h/w RAID-1
nbs-126.office.n 16 2182 99 +++++ +++ 27238 86 2172 98 +++++ +++ 5261 97 h/w RAID-5
Notes:
The last two are with hardware RAID (GDT 4513RZ), and 2Gb RAM instead of 1, but I adjusted
the -s parameter for bonnie++ accordingly.
commandline:
# ./bonnie++ -d /tmp -s 2048 -x2 -uroot
Results shown are for the second run. Machines were otherwise inactive, and carried a
minimum install.
[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/x-pkcs7-signature, Size: 3291 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] performance comparison soft-hardware RAID + LVM: bad
2002-10-15 17:39 [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Ron Arts
@ 2002-10-16 3:28 ` Heinz J . Mauelshagen
2002-10-17 10:51 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad (LONG) Ron Arts
2002-10-16 3:57 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Jon Bendtsen
1 sibling, 1 reply; 6+ messages in thread
From: Heinz J . Mauelshagen @ 2002-10-16 3:28 UTC (permalink / raw)
To: linux-lvm
On Wed, Oct 16, 2002 at 12:17:49AM +0200, Ron Arts wrote:
> Hello,
>
> I am interested in performance for hardware/software RAID
> in combination with LVM
>
> So I took a server (Dual Xeon 2.4GHz, 1Gb RAM), a RAID adapter,
> some identical SCSI disks and configured it with several of these
> options (using RH 8.0) and ran a few bonnie++ benchmarks.
>
> Results are below. Anyone care to comment? Especially LVM performance
> disappointed here.
>
> LVM machine setup:
>
> 2 18Gb disks. I created 3 partitions on both disks, 128Mb, 512Mb and 17Gb
> Equal partitions were combined into RAID-1 devices (md driver).
> First md device mounted on /boot, second for swapfile, and third
> as basis for LVM
>
> Out of the volume group four LV were created and mounted as follows:
>
> [root@nbs-126 root]# df
> Filesystem 1K-blocks Used Available Use% Mounted on
> /dev/vg0/root 4225092 1293064 2717400 33% /
> /dev/md0 124323 11517 106387 10% /boot
> /dev/vg0/home 4225092 32828 3977636 1% /home
> none 514996 0 514996 0% /dev/shm
> /dev/vg0/var 4225092 51720 3958744 2% /var
> /dev/vg0/mysql 16513960 32828 15642272 1% /var/lib/mysql
Ron, I don't get your configuration by this df output :(
You've got 3 mirrored MDs on 2 disks (1st: 128Mb, 2nd: 512Mb, 3rd: 17Gb)
3rd is used as the one and only physical volume (say /dev/md2)
for volume group "vg0", right?
How comes that the grand total of /dev/vg0/{root, home, var, mysql}
is ~27.84Gb when the volume group only holds the 17Gb of /dev/md2?
>
> Is there a reason for the performance degradation I saw with LVM?
If my above thoughts are correct, the logical volume(s) used could well be
suffering from bad mapping onto disk(s). You can check the mapping with
either "pvdisplay -v /dev/md2" or for eg. "lvdisplay -v /dev/vg00/root".
I don't feel sure about your MD configuration either.
Hope that spots some light on those numbers which differ from mine
(typically LVM gives a performamce enhancement for sequential input).
The mapping overhead of the LVM1 driver is in the sub percent order.
Regards,
Heinz -- The LVM Guy --
>
> Regards,
> Ron Arts
>
>
> Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
> -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
> nbs-126.offic 2008M 24005 99 66015 49 16148 7 27430 98 86915 15 369.0 1 single disk
> nbs-126.offic 2G 23422 99 70919 58 23800 11 25289 86 101485 17 433.4 1 s/w RAID-1
> nbs-126.offic 2G 8152 99 49897 94 23092 27 9122 92 78056 38 331.1 2 s/w RAID-1 + LVM
> nbs-126.offic 4032M 19695 99 44056 42 14179 9 21526 94 86450 16 344.3 1 h/w RAID-1
> nbs-126.offic 4032M 19916 99 24033 22 13343 9 22794 99 111662 30 388.5 1 h/w RAID-5
> ------Sequential Create------ --------Random Create--------
> -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
> files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
> nbs-126.office.n 16 2481 99 +++++ +++ +++++ +++ 2424 99 +++++ +++ 5508 98 single disk
> nbs-126.office.n 16 2530 99 +++++ +++ +++++ +++ 2437 99 +++++ +++ 6062 100 s/w RAID-1 soft
> nbs-126.office.n 16 800 99 +++++ +++ 12848 98 807 99 +++++ +++ 2591 99 s/w RAID-1 + LVM
> nbs-126.office.n 16 2138 98 +++++ +++ 31126 98 2200 99 +++++ +++ 5322 98 h/w RAID-1
> nbs-126.office.n 16 2182 99 +++++ +++ 27238 86 2172 98 +++++ +++ 5261 97 h/w RAID-5
>
>
> Notes:
>
> The last two are with hardware RAID (GDT 4513RZ), and 2Gb RAM instead of 1, but I adjusted
> the -s parameter for bonnie++ accordingly.
>
> commandline:
> # ./bonnie++ -d /tmp -s 2048 -x2 -uroot
> Results shown are for the second run. Machines were otherwise inactive, and carried a
> minimum install.
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen@Sistina.com +49 2626 141200
FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] performance comparison soft-hardware RAID + LVM: bad
2002-10-15 17:39 [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Ron Arts
2002-10-16 3:28 ` Heinz J . Mauelshagen
@ 2002-10-16 3:57 ` Jon Bendtsen
2002-10-16 11:04 ` Ron Arts
1 sibling, 1 reply; 6+ messages in thread
From: Jon Bendtsen @ 2002-10-16 3:57 UTC (permalink / raw)
To: linux-lvm
Ron Arts wrote:
>
> Hello,
>
> I am interested in performance for hardware/software RAID
> in combination with LVM
i've resently tested hardware vs. software on 3 different
3ware cards, and some IDE disks. My results showed that
software raid was somewhat faster than hardware, but i'd
still prefer hardware because of the handling of one
failing disk. (notice that if you dont get a warning when
a disk fails, you might as well run without raid, or run
raid0)
I've got a repport in .pdf (and .LyX) in english if someone
wants it.
> So I took a server (Dual Xeon 2.4GHz, 1Gb RAM), a RAID adapter,
> some identical SCSI disks and configured it with several of these
> options (using RH 8.0) and ran a few bonnie++ benchmarks.
Mine was a single p3 800, with 512MB memory, and i used tiobench
> Results are below. Anyone care to comment? Especially LVM performance
> disappointed here.
I cant clearly see what is LVM setup and what isnt. Remember that LVM
doesnt allocate blocks sequeltial, but by default the first one free.
So, when you create 3 lv's, and then you mkfs them, then you allocate
at least the first block. Then when you fill the rest of the
filesystem...
you allocate the next blocks. Results are one block in the beginning,
a wide gap, and then the rest of the blocks.
> LVM machine setup:
>
> 2 18Gb disks. I created 3 partitions on both disks, 128Mb, 512Mb and 17Gb
> Equal partitions were combined into RAID-1 devices (md driver).
> First md device mounted on /boot, second for swapfile, and third
> as basis for LVM
>
> Out of the volume group four LV were created and mounted as follows:
>
> [root@nbs-126 root]# df
> Filesystem 1K-blocks Used Available Use% Mounted on
> /dev/vg0/root 4225092 1293064 2717400 33% /
> /dev/md0 124323 11517 106387 10% /boot
> /dev/vg0/home 4225092 32828 3977636 1% /home
> none 514996 0 514996 0% /dev/shm
> /dev/vg0/var 4225092 51720 3958744 2% /var
> /dev/vg0/mysql 16513960 32828 15642272 1% /var/lib/mysql
>
> Is there a reason for the performance degradation I saw with LVM?
I've done 3 (or 0.5 + 0.5 + 1) benchmarks. The first 2 times i didnt do
it well enough. I dont believe you have done it well enough, you clearly
dont have enough numbers. I found that using tiobench i had to variate
the number of threads (concurrent read/write) and the blocksize, before
i
got the best performance. And it variates alot. (See my .pdf, which i
will
mail to you). I've got lots of numbers. I used gnuplot to create graphs,
but consider using iometer to run your benchmarks, i think it creates
the
graphs for you.
You dont have enough disks, 2 disks might be a widely used common setup,
but
other people use more disks, like 4, 8, ... especialy when using scsi,
which
for some reason doesnt seem to contain as much as IDE disks.
I saw a BIG performance drop when i tried to run tiobench on a smp
system,
but using another benchmark tool, i saw that it was only tiobench, not
the
performance that suffered.
I also saw a _GIGANTIC_ performance drop when i ran software raid0 ontop
of
2 software raid1. (or was it the other way ? (request my repport and see
for
yourself, the included one is regular performance)
JonB
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] performance comparison soft-hardware RAID + LVM: bad
2002-10-16 3:57 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Jon Bendtsen
@ 2002-10-16 11:04 ` Ron Arts
2002-10-17 4:19 ` [linux-lvm] performance comparison soft-hardware RAID + LVM:bad Jon Bendtsen
0 siblings, 1 reply; 6+ messages in thread
From: Ron Arts @ 2002-10-16 11:04 UTC (permalink / raw)
To: linux-lvm
[-- Attachment #1: Type: text/plain, Size: 3405 bytes --]
Jon Bendtsen wrote:
> Ron Arts wrote:
>
[snip]
(I received your report, thanks)
>
>
>>Results are below. Anyone care to comment? Especially LVM performance
>>disappointed here.
>
>
> I cant clearly see what is LVM setup and what isnt. Remember that LVM
> doesnt allocate blocks sequeltial, but by default the first one free.
> So, when you create 3 lv's, and then you mkfs them, then you allocate
> at least the first block. Then when you fill the rest of the
> filesystem...
> you allocate the next blocks. Results are one block in the beginning,
> a wide gap, and then the rest of the blocks.
>
Sorry, I don't understand. Why the gap?
Omn the other hand, the underlying devices are RAID-1 in software, the
allocation shouldn't matter should it?
>
>
>>LVM machine setup:
>>
>>2 18Gb disks. I created 3 partitions on both disks, 128Mb, 512Mb and 17Gb
>>Equal partitions were combined into RAID-1 devices (md driver).
>>First md device mounted on /boot, second for swapfile, and third
>>as basis for LVM
>>
>>Out of the volume group four LV were created and mounted as follows:
>>
>>[root@nbs-126 root]# df
>>Filesystem 1K-blocks Used Available Use% Mounted on
>>/dev/vg0/root 4225092 1293064 2717400 33% /
>>/dev/md0 124323 11517 106387 10% /boot
>>/dev/vg0/home 4225092 32828 3977636 1% /home
>>none 514996 0 514996 0% /dev/shm
>>/dev/vg0/var 4225092 51720 3958744 2% /var
>>/dev/vg0/mysql 16513960 32828 15642272 1% /var/lib/mysql
>>
>>Is there a reason for the performance degradation I saw with LVM?
>
>
> I've done 3 (or 0.5 + 0.5 + 1) benchmarks. The first 2 times i didnt do
> it well enough. I dont believe you have done it well enough, you clearly
> dont have enough numbers. I found that using tiobench i had to variate
> the number of threads (concurrent read/write) and the blocksize, before
> i
> got the best performance. And it variates alot. (See my .pdf, which i
> will
> mail to you). I've got lots of numbers. I used gnuplot to create graphs,
Okay, but lots of numbers still don't explain why in this particular case
performance was so slow. If I understand why, I can begin to make
optimizations.
To give some background:
I do this because I need such a setup for a particular application
(MySQL high volume logging server). If I understand the issues involved
I can make more informed choices implementing the application.
Should it log using multiple threads or one? Will readers from the
datbase hinder the writing process a lot? What is the best way
to add disks using LVM, without taking a large performance hit?
This server must be up 24x7. I found something called scsirastools
that can deal with hotswapping SCSI disks under software RAID.
I thought I'd first try some benchmarks with bonnie to get a feel
for the issues involved, and seeing the performance (and CPU) hit
for my LVM setup (and having never used LVM before) I decided
to ask you guys about this.
And thanks for your report, at least it confirmed what I
had seen: software raid is faster then hardware.
Regards,
Ron Arts
--
Netland Internet Services
bedrijfsmatige internetoplossingen
http://www.netland.nl Kruislaan 419 1098 VA Amsterdam
info: 020-5628282 servicedesk: 020-5628280 fax: 020-5628281
Does old mail ever arrive?
[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/x-pkcs7-signature, Size: 3291 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] performance comparison soft-hardware RAID + LVM:bad
2002-10-16 11:04 ` Ron Arts
@ 2002-10-17 4:19 ` Jon Bendtsen
0 siblings, 0 replies; 6+ messages in thread
From: Jon Bendtsen @ 2002-10-17 4:19 UTC (permalink / raw)
To: linux-lvm
Ron Arts wrote:
>
> Jon Bendtsen wrote:
> > Ron Arts wrote:
[snip]
> > I cant clearly see what is LVM setup and what isnt. Remember that LVM
> > doesnt allocate blocks sequeltial, but by default the first one free.
> > So, when you create 3 lv's, and then you mkfs them, then you allocate
> > at least the first block. Then when you fill the rest of the
> > filesystem...
> > you allocate the next blocks. Results are one block in the beginning,
> > a wide gap, and then the rest of the blocks.
> >
>
> Sorry, I don't understand. Why the gap?
> Omn the other hand, the underlying devices are RAID-1 in software, the
> allocation shouldn't matter should it?
Well, let me try a state of the art (tm) ascii drawing ;-D
disk1 disk2
|-----| |-----|
those you make into a mirror
|-----|
Lets zoom in on that and see how LVM works (unallocated vg)
|---------------------------------------------------------------------------------|
So, you make a lv in this vg
|#--------------------------------------------------------------------------------|
Then you make another
|#¤-------------------------------------------------------------------------------|
You allocate some data for the first lv
|#¤#####--------------------------------------------------------------------------|
You allocate some data for the 2. lv
|#¤#####¤¤¤¤¤¤--------------------------------------------------------------------|
Can you see the trend now ??
when you need a "block" you just get the next free. So, unless you are
carefull, or
make it allocate all on creation, then you get this
|#¤#####¤¤¤¤¤¤##¤#¤#¤#¤#¤¤¤¤####¤¤##¤#¤#¤#¤###¤¤¤¤##¤¤##¤¤##¤¤####¤¤¤¤¤#####¤¤##¤#|
And how do you think this changes your performance ? if you are reading
one BIG file.
that covers several # or ¤
> > I've done 3 (or 0.5 + 0.5 + 1) benchmarks. The first 2 times i didnt do
> > it well enough. I dont believe you have done it well enough, you clearly
> > dont have enough numbers. I found that using tiobench i had to variate
> > the number of threads (concurrent read/write) and the blocksize, before
> > i
> > got the best performance. And it variates alot. (See my .pdf, which i
> > will
> > mail to you). I've got lots of numbers. I used gnuplot to create graphs,
>
> Okay, but lots of numbers still don't explain why in this particular case
> performance was so slow. If I understand why, I can begin to make
> optimizations.
I think it is the default allocation of "blocks" for a lv in a vg.
The point with lots of numbers was that just running one benchmark, with
one concurrent write, aka one "thread" and trying to write one big file,
rather than 10 medium files, doesnt give an adequette view of the
performance.
> To give some background:
> I do this because I need such a setup for a particular application
> (MySQL high volume logging server). If I understand the issues involved
> I can make more informed choices implementing the application.
> Should it log using multiple threads or one? Will readers from the
> datbase hinder the writing process a lot? What is the best way
> to add disks using LVM, without taking a large performance hit?
I see your problem, but since you have many readers/writes, you
NEED to test it with concurrent access, maybe 10-20, or more
> This server must be up 24x7. I found something called scsirastools
> that can deal with hotswapping SCSI disks under software RAID.
good. Think of adding many small scsi disks to your raid setup, and
then make it raid10, or raid1 ontop of raid 0 (or the other way arround,
see my repport for which one kills performance)
the proxy server squid can handle more than one area to store the
files. You'll get greater performance by giving it more small areas,
rather than putting the disks into a larger raid array. MAYBE your
mysql logging server can do the same thing ?
> I thought I'd first try some benchmarks with bonnie to get a feel
> for the issues involved, and seeing the performance (and CPU) hit
> for my LVM setup (and having never used LVM before) I decided
> to ask you guys about this.
understandable, but i think you need to do more benchmarking, with
more than one concurrent access.
> And thanks for your report, at least it confirmed what I
> had seen: software raid is faster then hardware.
Well, it can be. I havent tried with _MANY_ disks, and i havent
tried with cpu load arround 100%. (per cpu). Actualy, as i wrote
somewhere in the repport, i would like if someone parallized the
raid, so you could get linear to the number of harddisks performance,
or fill the pci bus. So, someone who reads this... just parallize the
raid, it's not like the first block needs the next block, or the one
before that, so just create a simple asic, it doesnt need to be fast
just many of them, so the pci bus can be filled. 64bit 66MHz of course
;-D
JonB
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] performance comparison soft-hardware RAID + LVM: bad (LONG)
2002-10-16 3:28 ` Heinz J . Mauelshagen
@ 2002-10-17 10:51 ` Ron Arts
0 siblings, 0 replies; 6+ messages in thread
From: Ron Arts @ 2002-10-17 10:51 UTC (permalink / raw)
To: linux-lvm
[-- Attachment #1: Type: text/plain, Size: 69221 bytes --]
Heinz,
thanks for your response. This reply is rather long due to including
lvdisplay and pvdisplay output...
Heinz J . Mauelshagen wrote:
> On Wed, Oct 16, 2002 at 12:17:49AM +0200, Ron Arts wrote:
>
>>Hello,
>>
>>I am interested in performance for hardware/software RAID
>>in combination with LVM
>>
>>So I took a server (Dual Xeon 2.4GHz, 1Gb RAM), a RAID adapter,
>>some identical SCSI disks and configured it with several of these
>>options (using RH 8.0) and ran a few bonnie++ benchmarks.
>>
>>Results are below. Anyone care to comment? Especially LVM performance
>>disappointed here.
>>
>>LVM machine setup:
>>
>>2 18Gb disks. I created 3 partitions on both disks, 128Mb, 512Mb and 17Gb
>>Equal partitions were combined into RAID-1 devices (md driver).
>>First md device mounted on /boot, second for swapfile, and third
>>as basis for LVM
>>
>>Out of the volume group four LV were created and mounted as follows:
>>
>>[root@nbs-126 root]# df
>>Filesystem 1K-blocks Used Available Use% Mounted on
>>/dev/vg0/root 4225092 1293064 2717400 33% /
>>/dev/md0 124323 11517 106387 10% /boot
>>/dev/vg0/home 4225092 32828 3977636 1% /home
>>none 514996 0 514996 0% /dev/shm
>>/dev/vg0/var 4225092 51720 3958744 2% /var
>>/dev/vg0/mysql 16513960 32828 15642272 1% /var/lib/mysql
>
>
> Ron, I don't get your configuration by this df output :(
>
> You've got 3 mirrored MDs on 2 disks (1st: 128Mb, 2nd: 512Mb, 3rd: 17Gb)
>
> 3rd is used as the one and only physical volume (say /dev/md2)
> for volume group "vg0", right?
>
> How comes that the grand total of /dev/vg0/{root, home, var, mysql}
> is ~27.84Gb when the volume group only holds the 17Gb of /dev/md2?
>
Oops, sorry. All physical disks are 36 Gb, and indeed the volume group
holds 35Gb. It was late when I wrote this. Sorry.
>
>>Is there a reason for the performance degradation I saw with LVM?
>
>
> If my above thoughts are correct, the logical volume(s) used could well be
> suffering from bad mapping onto disk(s). You can check the mapping with
> either "pvdisplay -v /dev/md2" or for eg. "lvdisplay -v /dev/vg00/root".
I'm unsure how to interpret the pvdisplay and lvdisplay output.
This is the output of pvdisplay -v /dev/md2:
--- Physical volume ---
PV Name /dev/md2
VG Name vg0
PV Size 33.56 GB [70380544 secs] / NOT usable 4.19 MB [LVM: 161 KB]
PV# 1
PV Status available
Allocatable yes
Cur LV 4
PE Size (KByte) 4096
Total PE 8590
Free PE 1350
Allocated PE 7240
PV UUID YsIrFt-ep0A-nLxp-IjYS-8oic-JWyJ-sBrt1Q
--- Distribution of physical volume ---
LV Name LE of LV PE for LV
/dev/vg0/root 1048 1048
/dev/vg0/home 1048 1048
/dev/vg0/var 1048 1048
/dev/vg0/mysql 4096 4096
--- Physical extents ---
PE LV LE Disk sector
00000 /dev/vg0/root 00000 8576
00001 /dev/vg0/root 00001 16768
[ cut ... ]
01046 /dev/vg0/root 01046 8577408
01047 /dev/vg0/root 01047 8585600
01048 /dev/vg0/home 00000 8593792
01049 /dev/vg0/home 00001 8601984
[ cut ... ]
02094 /dev/vg0/home 01046 17162624
02095 /dev/vg0/home 01047 17170816
02096 /dev/vg0/var 00000 17179008
02097 /dev/vg0/var 00001 17187200
[cut ... ]
03142 /dev/vg0/var 01046 25747840
03143 /dev/vg0/var 01047 25756032
03144 /dev/vg0/mysql 00000 25764224
03145 /dev/vg0/mysql 00001 25772416
[ cut ... ]
07238 /dev/vg0/mysql 04094 59302272
07239 /dev/vg0/mysql 04095 59310464
07240 free
.....
08589 free
And this is the output for lvdisplay -v /dev/vg00/root:
--- Logical volume ---
LV Name /dev/vg0/root
VG Name vg0
LV Write Access read/write
LV Status available
LV # 1
# open 1
LV Size 4.09 GB
Current LE 1048
Allocated LE 1048
Allocation next free
Read ahead sectors 1024
Block device 58:0
--- Distribution of logical volume on 1 physical volume ---
PV Name PE on PV reads writes
/dev/md2 1048 1405215 2647120
--- logical volume i/o statistic ---
1405215 reads 2647120 writes
--- Logical extents ---
LE PV PE reads writes
00000 /dev/md2 00000 16 26546
00001 /dev/md2 00001 4 52466
00002 /dev/md2 00002 2 52173
00003 /dev/md2 00003 2 52173
00004 /dev/md2 00004 2 52173
00005 /dev/md2 00005 2 52173
00006 /dev/md2 00006 2 52173
00007 /dev/md2 00007 2 52173
00008 /dev/md2 00008 123 27181
00009 /dev/md2 00009 0 4762
00010 /dev/md2 00010 0 10442
00011 /dev/md2 00011 0 9266
00012 /dev/md2 00012 0 3113
00013 /dev/md2 00013 0 9510
00014 /dev/md2 00014 80 7140
00015 /dev/md2 00015 0 4017
00016 /dev/md2 00016 0 2143
00017 /dev/md2 00017 0 8201
00018 /dev/md2 00018 0 8106
00019 /dev/md2 00019 0 9883
00020 /dev/md2 00020 0 11927
00021 /dev/md2 00021 0 10819
00022 /dev/md2 00022 0 9261
00023 /dev/md2 00023 0 8151
00024 /dev/md2 00024 74 4797
00025 /dev/md2 00025 2674 4875
00026 /dev/md2 00026 1101 5714
00027 /dev/md2 00027 1047 6983
00028 /dev/md2 00028 1043 7494
00029 /dev/md2 00029 1039 7684
00030 /dev/md2 00030 1023 7960
00031 /dev/md2 00031 1453 8006
00032 /dev/md2 00032 421 579
00033 /dev/md2 00033 158 0
00034 /dev/md2 00034 514 0
00035 /dev/md2 00035 87 18
00036 /dev/md2 00036 1005 52
00037 /dev/md2 00037 897 0
00038 /dev/md2 00038 1025 0
00039 /dev/md2 00039 597 1434
00040 /dev/md2 00040 617 4096
00041 /dev/md2 00041 446 4096
00042 /dev/md2 00042 936 4706
00043 /dev/md2 00043 1928 4442
00044 /dev/md2 00044 2877 4652
00045 /dev/md2 00045 1167 5516
00046 /dev/md2 00046 1023 5971
00047 /dev/md2 00047 1023 5341
00048 /dev/md2 00048 1023 4387
00049 /dev/md2 00049 1023 4261
00050 /dev/md2 00050 3023 4677
00051 /dev/md2 00051 1397 5126
00052 /dev/md2 00052 1023 4849
00053 /dev/md2 00053 1763 4098
00054 /dev/md2 00054 1262 4094
00055 /dev/md2 00055 2112 4756
00056 /dev/md2 00056 1023 5120
00057 /dev/md2 00057 1023 5124
00058 /dev/md2 00058 1023 4173
00059 /dev/md2 00059 1023 4096
00060 /dev/md2 00060 1625 4100
00061 /dev/md2 00061 1190 4094
00062 /dev/md2 00062 1063 4100
00063 /dev/md2 00063 1039 4096
00064 /dev/md2 00064 847 1700
00065 /dev/md2 00065 165 16
00066 /dev/md2 00066 400 0
00067 /dev/md2 00067 11 4
00068 /dev/md2 00068 972 79
00069 /dev/md2 00069 903 732
00070 /dev/md2 00070 617 4313
00071 /dev/md2 00071 834 3648
00072 /dev/md2 00072 1389 5747
00073 /dev/md2 00073 1023 4369
00074 /dev/md2 00074 1023 4096
00075 /dev/md2 00075 1023 4098
00076 /dev/md2 00076 1023 4098
00077 /dev/md2 00077 1023 4094
00078 /dev/md2 00078 1443 4094
00079 /dev/md2 00079 1023 4100
00080 /dev/md2 00080 1023 4100
00081 /dev/md2 00081 1842 4096
00082 /dev/md2 00082 1183 4100
00083 /dev/md2 00083 1134 4096
00084 /dev/md2 00084 1823 4094
00085 /dev/md2 00085 2027 4094
00086 /dev/md2 00086 1023 4104
00087 /dev/md2 00087 1459 4098
00088 /dev/md2 00088 1023 4100
00089 /dev/md2 00089 1023 4094
00090 /dev/md2 00090 1023 4094
00091 /dev/md2 00091 1023 4096
00092 /dev/md2 00092 1023 4130
00093 /dev/md2 00093 1023 4096
00094 /dev/md2 00094 1507 4120
00095 /dev/md2 00095 1023 4099
00096 /dev/md2 00096 212 297
00097 /dev/md2 00097 42 0
00098 /dev/md2 00098 102 0
00099 /dev/md2 00099 86 16
00100 /dev/md2 00100 944 56
00101 /dev/md2 00101 1608 606
00102 /dev/md2 00102 2044 1024
00103 /dev/md2 00103 1989 1024
00104 /dev/md2 00104 1745 3554
00105 /dev/md2 00105 2043 4094
00106 /dev/md2 00106 2019 4098
00107 /dev/md2 00107 2014 4098
00108 /dev/md2 00108 2039 4100
00109 /dev/md2 00109 2006 4096
00110 /dev/md2 00110 2009 4100
00111 /dev/md2 00111 2045 4096
00112 /dev/md2 00112 2046 4096
00113 /dev/md2 00113 2046 4098
00114 /dev/md2 00114 2046 4098
00115 /dev/md2 00115 2046 4098
00116 /dev/md2 00116 1971 4094
00117 /dev/md2 00117 2078 4094
00118 /dev/md2 00118 3969 4098
00119 /dev/md2 00119 1023 4098
00120 /dev/md2 00120 1075 4094
00121 /dev/md2 00121 1365 4100
00122 /dev/md2 00122 1023 4137
00123 /dev/md2 00123 1023 5120
00124 /dev/md2 00124 1025 5118
00125 /dev/md2 00125 1023 5122
00126 /dev/md2 00126 1023 5122
00127 /dev/md2 00127 1558 5122
00128 /dev/md2 00128 298 77
00129 /dev/md2 00129 538 2397
00130 /dev/md2 00130 1023 5118
00131 /dev/md2 00131 1055 5118
00132 /dev/md2 00132 1023 5118
00133 /dev/md2 00133 1024 5122
00134 /dev/md2 00134 1023 5124
00135 /dev/md2 00135 1023 5120
00136 /dev/md2 00136 1023 5124
00137 /dev/md2 00137 1023 5118
00138 /dev/md2 00138 1023 5138
00139 /dev/md2 00139 1105 5134
00140 /dev/md2 00140 1461 5126
00141 /dev/md2 00141 1023 5122
00142 /dev/md2 00142 1023 5120
00143 /dev/md2 00143 1023 4880
00144 /dev/md2 00144 1023 4098
00145 /dev/md2 00145 1023 4096
00146 /dev/md2 00146 1849 4100
00147 /dev/md2 00147 1592 4096
00148 /dev/md2 00148 1023 4101
00149 /dev/md2 00149 1023 4099
00150 /dev/md2 00150 1023 4096
00151 /dev/md2 00151 1023 4098
00152 /dev/md2 00152 1023 4098
00153 /dev/md2 00153 1023 4098
00154 /dev/md2 00154 1023 4096
00155 /dev/md2 00155 1023 4096
00156 /dev/md2 00156 1306 4096
00157 /dev/md2 00157 1023 4096
00158 /dev/md2 00158 1023 4090
00159 /dev/md2 00159 1023 4087
00160 /dev/md2 00160 220 868
00161 /dev/md2 00161 1023 4167
00162 /dev/md2 00162 1023 4380
00163 /dev/md2 00163 1023 4082
00164 /dev/md2 00164 2255 4087
00165 /dev/md2 00165 1568 4089
00166 /dev/md2 00166 1023 4082
00167 /dev/md2 00167 1518 4079
00168 /dev/md2 00168 1023 4086
00169 /dev/md2 00169 1023 4089
00170 /dev/md2 00170 1023 4077
00171 /dev/md2 00171 1023 4089
00172 /dev/md2 00172 1023 3574
00173 /dev/md2 00173 1064 3072
00174 /dev/md2 00174 1023 3070
00175 /dev/md2 00175 1026 3074
00176 /dev/md2 00176 1023 3072
00177 /dev/md2 00177 1023 3072
00178 /dev/md2 00178 1023 3080
00179 /dev/md2 00179 1023 3078
00180 /dev/md2 00180 1023 3074
00181 /dev/md2 00181 1023 3072
00182 /dev/md2 00182 1023 3070
00183 /dev/md2 00183 1023 3072
00184 /dev/md2 00184 1023 3072
00185 /dev/md2 00185 1023 3072
00186 /dev/md2 00186 1023 3076
00187 /dev/md2 00187 1023 3070
00188 /dev/md2 00188 1023 3070
00189 /dev/md2 00189 1023 3072
00190 /dev/md2 00190 1035 3070
00191 /dev/md2 00191 1023 3070
00192 /dev/md2 00192 241 1969
00193 /dev/md2 00193 374 0
00194 /dev/md2 00194 495 0
00195 /dev/md2 00195 153 0
00196 /dev/md2 00196 1 0
00197 /dev/md2 00197 169 0
00198 /dev/md2 00198 792 5260
00199 /dev/md2 00199 1105 3517
00200 /dev/md2 00200 834 3959
00201 /dev/md2 00201 1511 5543
00202 /dev/md2 00202 1446 4355
00203 /dev/md2 00203 1116 4147
00204 /dev/md2 00204 1023 3535
00205 /dev/md2 00205 1023 3074
00206 /dev/md2 00206 1023 3072
00207 /dev/md2 00207 1023 3072
00208 /dev/md2 00208 1023 3076
00209 /dev/md2 00209 544 1631
00210 /dev/md2 00210 0 0
00211 /dev/md2 00211 0 0
00212 /dev/md2 00212 0 0
00213 /dev/md2 00213 0 0
00214 /dev/md2 00214 0 0
00215 /dev/md2 00215 0 0
00216 /dev/md2 00216 0 0
00217 /dev/md2 00217 0 0
00218 /dev/md2 00218 0 0
00219 /dev/md2 00219 0 0
00220 /dev/md2 00220 0 0
00221 /dev/md2 00221 0 0
00222 /dev/md2 00222 0 0
00223 /dev/md2 00223 0 0
00224 /dev/md2 00224 163 1050
00225 /dev/md2 00225 233 11
00226 /dev/md2 00226 424 0
00227 /dev/md2 00227 60 0
00228 /dev/md2 00228 676 2
00229 /dev/md2 00229 876 232
00230 /dev/md2 00230 61 3061
00231 /dev/md2 00231 0 1579
00232 /dev/md2 00232 0 0
00233 /dev/md2 00233 0 0
00234 /dev/md2 00234 0 0
00235 /dev/md2 00235 0 0
00236 /dev/md2 00236 0 0
00237 /dev/md2 00237 0 0
00238 /dev/md2 00238 0 0
00239 /dev/md2 00239 0 0
00240 /dev/md2 00240 0 0
00241 /dev/md2 00241 0 0
00242 /dev/md2 00242 0 0
00243 /dev/md2 00243 0 0
00244 /dev/md2 00244 0 0
00245 /dev/md2 00245 0 0
00246 /dev/md2 00246 0 0
00247 /dev/md2 00247 0 0
00248 /dev/md2 00248 0 0
00249 /dev/md2 00249 0 0
00250 /dev/md2 00250 0 0
00251 /dev/md2 00251 0 0
00252 /dev/md2 00252 0 0
00253 /dev/md2 00253 0 0
00254 /dev/md2 00254 0 0
00255 /dev/md2 00255 0 0
00256 /dev/md2 00256 334 1092
00257 /dev/md2 00257 604 0
00258 /dev/md2 00258 935 0
00259 /dev/md2 00259 139 0
00260 /dev/md2 00260 2 0
00261 /dev/md2 00261 415 1772
00262 /dev/md2 00262 38 3713
00263 /dev/md2 00263 0 2461
00264 /dev/md2 00264 0 88
00265 /dev/md2 00265 0 0
00266 /dev/md2 00266 0 0
00267 /dev/md2 00267 0 0
00268 /dev/md2 00268 0 0
00269 /dev/md2 00269 0 0
00270 /dev/md2 00270 0 0
00271 /dev/md2 00271 0 0
00272 /dev/md2 00272 0 0
00273 /dev/md2 00273 0 0
00274 /dev/md2 00274 0 0
00275 /dev/md2 00275 0 0
00276 /dev/md2 00276 0 0
00277 /dev/md2 00277 0 0
00278 /dev/md2 00278 0 0
00279 /dev/md2 00279 0 0
00280 /dev/md2 00280 0 0
00281 /dev/md2 00281 0 0
00282 /dev/md2 00282 0 0
00283 /dev/md2 00283 0 0
00284 /dev/md2 00284 0 0
00285 /dev/md2 00285 0 0
00286 /dev/md2 00286 0 0
00287 /dev/md2 00287 0 0
00288 /dev/md2 00288 149 710
00289 /dev/md2 00289 86 0
00290 /dev/md2 00290 395 0
00291 /dev/md2 00291 12 0
00292 /dev/md2 00292 798 60
00293 /dev/md2 00293 642 1267
00294 /dev/md2 00294 1 2694
00295 /dev/md2 00295 0 1275
00296 /dev/md2 00296 0 0
00297 /dev/md2 00297 0 0
00298 /dev/md2 00298 0 0
00299 /dev/md2 00299 0 0
00300 /dev/md2 00300 0 0
00301 /dev/md2 00301 0 0
00302 /dev/md2 00302 0 0
00303 /dev/md2 00303 0 0
00304 /dev/md2 00304 0 0
00305 /dev/md2 00305 0 0
00306 /dev/md2 00306 0 0
00307 /dev/md2 00307 0 0
00308 /dev/md2 00308 0 0
00309 /dev/md2 00309 0 0
00310 /dev/md2 00310 0 0
00311 /dev/md2 00311 0 0
00312 /dev/md2 00312 0 0
00313 /dev/md2 00313 0 0
00314 /dev/md2 00314 0 0
00315 /dev/md2 00315 0 0
00316 /dev/md2 00316 0 0
00317 /dev/md2 00317 0 0
00318 /dev/md2 00318 0 0
00319 /dev/md2 00319 0 0
00320 /dev/md2 00320 119 959
00321 /dev/md2 00321 77 0
00322 /dev/md2 00322 960 0
00323 /dev/md2 00323 32 4
00324 /dev/md2 00324 969 65
00325 /dev/md2 00325 730 1603
00326 /dev/md2 00326 237 3207
00327 /dev/md2 00327 347 3565
00328 /dev/md2 00328 0 1631
00329 /dev/md2 00329 0 1024
00330 /dev/md2 00330 0 1024
00331 /dev/md2 00331 188 1341
00332 /dev/md2 00332 0 1021
00333 /dev/md2 00333 0 25
00334 /dev/md2 00334 0 0
00335 /dev/md2 00335 0 0
00336 /dev/md2 00336 0 0
00337 /dev/md2 00337 0 0
00338 /dev/md2 00338 0 0
00339 /dev/md2 00339 0 0
00340 /dev/md2 00340 0 0
00341 /dev/md2 00341 0 0
00342 /dev/md2 00342 0 0
00343 /dev/md2 00343 0 0
00344 /dev/md2 00344 0 0
00345 /dev/md2 00345 0 0
00346 /dev/md2 00346 0 0
00347 /dev/md2 00347 0 0
00348 /dev/md2 00348 0 0
00349 /dev/md2 00349 0 0
00350 /dev/md2 00350 0 0
00351 /dev/md2 00351 0 0
00352 /dev/md2 00352 137 983
00353 /dev/md2 00353 0 0
00354 /dev/md2 00354 25 5
00355 /dev/md2 00355 74 0
00356 /dev/md2 00356 833 39
00357 /dev/md2 00357 1024 0
00358 /dev/md2 00358 739 286
00359 /dev/md2 00359 22 2074
00360 /dev/md2 00360 241 2922
00361 /dev/md2 00361 21 352
00362 /dev/md2 00362 0 0
00363 /dev/md2 00363 0 0
00364 /dev/md2 00364 0 0
00365 /dev/md2 00365 0 0
00366 /dev/md2 00366 0 0
00367 /dev/md2 00367 0 0
00368 /dev/md2 00368 0 0
00369 /dev/md2 00369 0 0
00370 /dev/md2 00370 0 0
00371 /dev/md2 00371 0 0
00372 /dev/md2 00372 0 0
00373 /dev/md2 00373 0 0
00374 /dev/md2 00374 0 0
00375 /dev/md2 00375 0 0
00376 /dev/md2 00376 0 0
00377 /dev/md2 00377 0 0
00378 /dev/md2 00378 0 0
00379 /dev/md2 00379 0 0
00380 /dev/md2 00380 0 0
00381 /dev/md2 00381 0 0
00382 /dev/md2 00382 0 0
00383 /dev/md2 00383 0 0
00384 /dev/md2 00384 138 814
00385 /dev/md2 00385 50 0
00386 /dev/md2 00386 277 0
00387 /dev/md2 00387 369 0
00388 /dev/md2 00388 1018 2
00389 /dev/md2 00389 647 1
00390 /dev/md2 00390 0 0
00391 /dev/md2 00391 0 0
00392 /dev/md2 00392 0 0
00393 /dev/md2 00393 0 0
00394 /dev/md2 00394 196 1559
00395 /dev/md2 00395 201 2133
00396 /dev/md2 00396 0 446
00397 /dev/md2 00397 0 0
00398 /dev/md2 00398 0 0
00399 /dev/md2 00399 0 0
00400 /dev/md2 00400 0 0
00401 /dev/md2 00401 0 0
00402 /dev/md2 00402 0 0
00403 /dev/md2 00403 0 0
00404 /dev/md2 00404 0 0
00405 /dev/md2 00405 0 0
00406 /dev/md2 00406 0 0
00407 /dev/md2 00407 0 0
00408 /dev/md2 00408 0 0
00409 /dev/md2 00409 0 0
00410 /dev/md2 00410 0 0
00411 /dev/md2 00411 0 0
00412 /dev/md2 00412 0 0
00413 /dev/md2 00413 0 0
00414 /dev/md2 00414 0 0
00415 /dev/md2 00415 0 0
00416 /dev/md2 00416 284 4415
00417 /dev/md2 00417 566 70
00418 /dev/md2 00418 221 4050
00419 /dev/md2 00419 0 0
00420 /dev/md2 00420 1 0
00421 /dev/md2 00421 12 8458
00422 /dev/md2 00422 188 4760
00423 /dev/md2 00423 297 7840
00424 /dev/md2 00424 250 13838
00425 /dev/md2 00425 376 4103
00426 /dev/md2 00426 494 4797
00427 /dev/md2 00427 408 5309
00428 /dev/md2 00428 284 2278
00429 /dev/md2 00429 300 1940
00430 /dev/md2 00430 171 1343
00431 /dev/md2 00431 42 1226
00432 /dev/md2 00432 4 1041
00433 /dev/md2 00433 6 1062
00434 /dev/md2 00434 210 1155
00435 /dev/md2 00435 710 1153
00436 /dev/md2 00436 746 1397
00437 /dev/md2 00437 784 1163
00438 /dev/md2 00438 615 1108
00439 /dev/md2 00439 433 1110
00440 /dev/md2 00440 561 1137
00441 /dev/md2 00441 654 1201
00442 /dev/md2 00442 738 1271
00443 /dev/md2 00443 468 1346
00444 /dev/md2 00444 1 1024
00445 /dev/md2 00445 65 1097
00446 /dev/md2 00446 517 1399
00447 /dev/md2 00447 424 1768
00448 /dev/md2 00448 101 1270
00449 /dev/md2 00449 256 49
00450 /dev/md2 00450 405 75
00451 /dev/md2 00451 72 104
00452 /dev/md2 00452 650 59
00453 /dev/md2 00453 958 435
00454 /dev/md2 00454 29 3683
00455 /dev/md2 00455 305 4022
00456 /dev/md2 00456 454 3385
00457 /dev/md2 00457 687 1208
00458 /dev/md2 00458 628 995
00459 /dev/md2 00459 914 1009
00460 /dev/md2 00460 640 1005
00461 /dev/md2 00461 140 223
00462 /dev/md2 00462 0 0
00463 /dev/md2 00463 0 0
00464 /dev/md2 00464 0 0
00465 /dev/md2 00465 0 0
00466 /dev/md2 00466 0 0
00467 /dev/md2 00467 0 0
00468 /dev/md2 00468 0 0
00469 /dev/md2 00469 0 0
00470 /dev/md2 00470 0 0
00471 /dev/md2 00471 0 0
00472 /dev/md2 00472 0 0
00473 /dev/md2 00473 0 0
00474 /dev/md2 00474 0 0
00475 /dev/md2 00475 0 0
00476 /dev/md2 00476 0 0
00477 /dev/md2 00477 0 0
00478 /dev/md2 00478 0 0
00479 /dev/md2 00479 0 0
00480 /dev/md2 00480 167 1020
00481 /dev/md2 00481 227 0
00482 /dev/md2 00482 635 4
00483 /dev/md2 00483 74 0
00484 /dev/md2 00484 944 62
00485 /dev/md2 00485 638 1275
00486 /dev/md2 00486 0 3866
00487 /dev/md2 00487 307 3632
00488 /dev/md2 00488 0 4364
00489 /dev/md2 00489 0 1288
00490 /dev/md2 00490 0 479
00491 /dev/md2 00491 0 0
00492 /dev/md2 00492 0 0
00493 /dev/md2 00493 0 0
00494 /dev/md2 00494 0 0
00495 /dev/md2 00495 0 1116
00496 /dev/md2 00496 0 1005
00497 /dev/md2 00497 0 450
00498 /dev/md2 00498 0 317
00499 /dev/md2 00499 0 638
00500 /dev/md2 00500 0 1019
00501 /dev/md2 00501 0 723
00502 /dev/md2 00502 0 988
00503 /dev/md2 00503 0 3986
00504 /dev/md2 00504 0 2330
00505 /dev/md2 00505 0 161
00506 /dev/md2 00506 0 595
00507 /dev/md2 00507 0 799
00508 /dev/md2 00508 0 0
00509 /dev/md2 00509 0 0
00510 /dev/md2 00510 0 0
00511 /dev/md2 00511 0 0
00512 /dev/md2 00512 129 1268
00513 /dev/md2 00513 25 0
00514 /dev/md2 00514 394 34
00515 /dev/md2 00515 22 0
00516 /dev/md2 00516 175 5
00517 /dev/md2 00517 651 1353
00518 /dev/md2 00518 73 3250
00519 /dev/md2 00519 108 1740
00520 /dev/md2 00520 251 2706
00521 /dev/md2 00521 0 673
00522 /dev/md2 00522 0 0
00523 /dev/md2 00523 0 0
00524 /dev/md2 00524 0 0
00525 /dev/md2 00525 0 0
00526 /dev/md2 00526 0 0
00527 /dev/md2 00527 0 0
00528 /dev/md2 00528 0 0
00529 /dev/md2 00529 0 0
00530 /dev/md2 00530 0 0
00531 /dev/md2 00531 0 0
00532 /dev/md2 00532 0 0
00533 /dev/md2 00533 0 0
00534 /dev/md2 00534 0 0
00535 /dev/md2 00535 0 0
00536 /dev/md2 00536 0 0
00537 /dev/md2 00537 0 0
00538 /dev/md2 00538 0 0
00539 /dev/md2 00539 0 0
00540 /dev/md2 00540 0 0
00541 /dev/md2 00541 0 0
00542 /dev/md2 00542 0 0
00543 /dev/md2 00543 0 0
00544 /dev/md2 00544 145 159
00545 /dev/md2 00545 0 1833
00546 /dev/md2 00546 0 948
00547 /dev/md2 00547 0 0
00548 /dev/md2 00548 0 0
00549 /dev/md2 00549 0 0
00550 /dev/md2 00550 0 0
00551 /dev/md2 00551 0 0
00552 /dev/md2 00552 0 0
00553 /dev/md2 00553 0 0
00554 /dev/md2 00554 0 0
00555 /dev/md2 00555 0 0
00556 /dev/md2 00556 0 0
00557 /dev/md2 00557 0 0
00558 /dev/md2 00558 0 0
00559 /dev/md2 00559 0 0
00560 /dev/md2 00560 0 0
00561 /dev/md2 00561 0 0
00562 /dev/md2 00562 0 0
00563 /dev/md2 00563 0 0
00564 /dev/md2 00564 0 0
00565 /dev/md2 00565 0 0
00566 /dev/md2 00566 0 0
00567 /dev/md2 00567 0 0
00568 /dev/md2 00568 0 0
00569 /dev/md2 00569 0 0
00570 /dev/md2 00570 0 0
00571 /dev/md2 00571 0 0
00572 /dev/md2 00572 0 0
00573 /dev/md2 00573 0 0
00574 /dev/md2 00574 0 0
00575 /dev/md2 00575 0 0
00576 /dev/md2 00576 157 412
00577 /dev/md2 00577 77 1
00578 /dev/md2 00578 10 0
00579 /dev/md2 00579 20 0
00580 /dev/md2 00580 887 38
00581 /dev/md2 00581 987 463
00582 /dev/md2 00582 1407 6701
00583 /dev/md2 00583 1977 5266
00584 /dev/md2 00584 3121 4728
00585 /dev/md2 00585 3141 4096
00586 /dev/md2 00586 3129 4096
00587 /dev/md2 00587 3141 4096
00588 /dev/md2 00588 3141 4100
00589 /dev/md2 00589 3147 4100
00590 /dev/md2 00590 3125 4098
00591 /dev/md2 00591 3125 4096
00592 /dev/md2 00592 3125 4100
00593 /dev/md2 00593 3121 4100
00594 /dev/md2 00594 3105 3150
00595 /dev/md2 00595 3131 3072
00596 /dev/md2 00596 3125 3072
00597 /dev/md2 00597 3117 3074
00598 /dev/md2 00598 3125 3070
00599 /dev/md2 00599 3121 3074
00600 /dev/md2 00600 3153 3072
00601 /dev/md2 00601 3137 3072
00602 /dev/md2 00602 3125 3076
00603 /dev/md2 00603 3135 3074
00604 /dev/md2 00604 3125 3074
00605 /dev/md2 00605 3171 3074
00606 /dev/md2 00606 3141 3076
00607 /dev/md2 00607 3105 3074
00608 /dev/md2 00608 162 1071
00609 /dev/md2 00609 131 0
00610 /dev/md2 00610 421 0
00611 /dev/md2 00611 44 0
00612 /dev/md2 00612 241 14
00613 /dev/md2 00613 939 1574
00614 /dev/md2 00614 2089 5413
00615 /dev/md2 00615 753 4027
00616 /dev/md2 00616 3171 4393
00617 /dev/md2 00617 3157 3076
00618 /dev/md2 00618 3141 3072
00619 /dev/md2 00619 3138 3072
00620 /dev/md2 00620 3132 3070
00621 /dev/md2 00621 3129 3074
00622 /dev/md2 00622 3149 3074
00623 /dev/md2 00623 3105 3072
00624 /dev/md2 00624 3125 3072
00625 /dev/md2 00625 3141 3074
00626 /dev/md2 00626 3145 3072
00627 /dev/md2 00627 3117 3074
00628 /dev/md2 00628 3129 3074
00629 /dev/md2 00629 3133 3072
00630 /dev/md2 00630 3167 3078
00631 /dev/md2 00631 3161 3078
00632 /dev/md2 00632 3141 3076
00633 /dev/md2 00633 3129 3076
00634 /dev/md2 00634 3117 3076
00635 /dev/md2 00635 3143 3074
00636 /dev/md2 00636 3121 3072
00637 /dev/md2 00637 3153 3074
00638 /dev/md2 00638 3133 3074
00639 /dev/md2 00639 3125 3076
00640 /dev/md2 00640 83 915
00641 /dev/md2 00641 157 0
00642 /dev/md2 00642 47 0
00643 /dev/md2 00643 61 0
00644 /dev/md2 00644 81 0
00645 /dev/md2 00645 391 0
00646 /dev/md2 00646 40 0
00647 /dev/md2 00647 20 0
00648 /dev/md2 00648 0 0
00649 /dev/md2 00649 71 0
00650 /dev/md2 00650 1947 3673
00651 /dev/md2 00651 3225 5271
00652 /dev/md2 00652 3123 5161
00653 /dev/md2 00653 3133 3076
00654 /dev/md2 00654 3109 3070
00655 /dev/md2 00655 3125 3070
00656 /dev/md2 00656 3121 3070
00657 /dev/md2 00657 3147 3080
00658 /dev/md2 00658 3121 3074
00659 /dev/md2 00659 3141 3078
00660 /dev/md2 00660 3117 3076
00661 /dev/md2 00661 3149 3078
00662 /dev/md2 00662 3133 3072
00663 /dev/md2 00663 3111 3078
00664 /dev/md2 00664 3121 3074
00665 /dev/md2 00665 3137 3072
00666 /dev/md2 00666 3143 3074
00667 /dev/md2 00667 3129 3074
00668 /dev/md2 00668 3121 3074
00669 /dev/md2 00669 3133 3074
00670 /dev/md2 00670 3113 3070
00671 /dev/md2 00671 3125 3074
00672 /dev/md2 00672 112 294
00673 /dev/md2 00673 164 0
00674 /dev/md2 00674 70 0
00675 /dev/md2 00675 118 18
00676 /dev/md2 00676 15 0
00677 /dev/md2 00677 2 0
00678 /dev/md2 00678 37 21
00679 /dev/md2 00679 18 18
00680 /dev/md2 00680 356 0
00681 /dev/md2 00681 29 27
00682 /dev/md2 00682 27 27
00683 /dev/md2 00683 57 0
00684 /dev/md2 00684 0 0
00685 /dev/md2 00685 156 18
00686 /dev/md2 00686 649 0
00687 /dev/md2 00687 36 36
00688 /dev/md2 00688 0 0
00689 /dev/md2 00689 0 0
00690 /dev/md2 00690 0 0
00691 /dev/md2 00691 0 0
00692 /dev/md2 00692 22 21
00693 /dev/md2 00693 0 0
00694 /dev/md2 00694 260 36
00695 /dev/md2 00695 3109 3044
00696 /dev/md2 00696 3105 3072
00697 /dev/md2 00697 3139 3074
00698 /dev/md2 00698 3125 3080
00699 /dev/md2 00699 3125 3072
00700 /dev/md2 00700 3141 3074
00701 /dev/md2 00701 3153 3078
00702 /dev/md2 00702 3145 3072
00703 /dev/md2 00703 3117 3074
00704 /dev/md2 00704 255 1706
00705 /dev/md2 00705 157 0
00706 /dev/md2 00706 388 17
00707 /dev/md2 00707 51 8
00708 /dev/md2 00708 901 35
00709 /dev/md2 00709 1020 1525
00710 /dev/md2 00710 1597 4679
00711 /dev/md2 00711 1406 2791
00712 /dev/md2 00712 3251 6783
00713 /dev/md2 00713 3146 3126
00714 /dev/md2 00714 3135 3072
00715 /dev/md2 00715 3129 3070
00716 /dev/md2 00716 3144 3596
00717 /dev/md2 00717 3120 3717
00718 /dev/md2 00718 3141 3203
00719 /dev/md2 00719 3109 4079
00720 /dev/md2 00720 3123 4094
00721 /dev/md2 00721 3116 3404
00722 /dev/md2 00722 3101 3933
00723 /dev/md2 00723 3135 5123
00724 /dev/md2 00724 3146 4324
00725 /dev/md2 00725 3129 4218
00726 /dev/md2 00726 3111 3178
00727 /dev/md2 00727 3136 3970
00728 /dev/md2 00728 3111 3072
00729 /dev/md2 00729 3109 3074
00730 /dev/md2 00730 3141 3070
00731 /dev/md2 00731 3117 3076
00732 /dev/md2 00732 3137 3072
00733 /dev/md2 00733 3127 3078
00734 /dev/md2 00734 3133 3076
00735 /dev/md2 00735 3137 3074
00736 /dev/md2 00736 131 1237
00737 /dev/md2 00737 187 20
00738 /dev/md2 00738 230 0
00739 /dev/md2 00739 65 0
00740 /dev/md2 00740 910 82
00741 /dev/md2 00741 1041 1583
00742 /dev/md2 00742 2173 5459
00743 /dev/md2 00743 502 3371
00744 /dev/md2 00744 3282 5326
00745 /dev/md2 00745 3236 4891
00746 /dev/md2 00746 3119 4104
00747 /dev/md2 00747 3117 3070
00748 /dev/md2 00748 3109 3479
00749 /dev/md2 00749 3137 3893
00750 /dev/md2 00750 3163 5477
00751 /dev/md2 00751 3129 4693
00752 /dev/md2 00752 3141 4033
00753 /dev/md2 00753 3117 3505
00754 /dev/md2 00754 3109 3072
00755 /dev/md2 00755 3097 4378
00756 /dev/md2 00756 3121 5301
00757 /dev/md2 00757 3135 3923
00758 /dev/md2 00758 3127 3072
00759 /dev/md2 00759 3129 3906
00760 /dev/md2 00760 3147 3072
00761 /dev/md2 00761 3125 3076
00762 /dev/md2 00762 3147 3076
00763 /dev/md2 00763 3129 3074
00764 /dev/md2 00764 3113 3072
00765 /dev/md2 00765 3141 3070
00766 /dev/md2 00766 3099 3074
00767 /dev/md2 00767 3115 3070
00768 /dev/md2 00768 60 180
00769 /dev/md2 00769 1 0
00770 /dev/md2 00770 33 0
00771 /dev/md2 00771 758 0
00772 /dev/md2 00772 167 0
00773 /dev/md2 00773 0 0
00774 /dev/md2 00774 0 0
00775 /dev/md2 00775 0 0
00776 /dev/md2 00776 0 0
00777 /dev/md2 00777 0 0
00778 /dev/md2 00778 0 0
00779 /dev/md2 00779 0 0
00780 /dev/md2 00780 1421 678
00781 /dev/md2 00781 3131 3072
00782 /dev/md2 00782 3123 3070
00783 /dev/md2 00783 3137 3074
00784 /dev/md2 00784 3133 3074
00785 /dev/md2 00785 3125 3072
00786 /dev/md2 00786 3097 3074
00787 /dev/md2 00787 3133 3078
00788 /dev/md2 00788 3129 3074
00789 /dev/md2 00789 3147 3074
00790 /dev/md2 00790 3129 3076
00791 /dev/md2 00791 3129 3072
00792 /dev/md2 00792 3145 3070
00793 /dev/md2 00793 3135 3070
00794 /dev/md2 00794 3139 3072
00795 /dev/md2 00795 3141 3072
00796 /dev/md2 00796 3125 3070
00797 /dev/md2 00797 3125 3074
00798 /dev/md2 00798 3137 3076
00799 /dev/md2 00799 3117 3070
00800 /dev/md2 00800 424 1591
00801 /dev/md2 00801 978 0
00802 /dev/md2 00802 498 0
00803 /dev/md2 00803 278 46
00804 /dev/md2 00804 1046 1621
00805 /dev/md2 00805 2006 6127
00806 /dev/md2 00806 1013 5629
00807 /dev/md2 00807 3109 3508
00808 /dev/md2 00808 3101 3072
00809 /dev/md2 00809 3141 3076
00810 /dev/md2 00810 3128 3074
00811 /dev/md2 00811 3118 3076
00812 /dev/md2 00812 3122 3072
00813 /dev/md2 00813 3124 3076
00814 /dev/md2 00814 3119 3074
00815 /dev/md2 00815 3141 3074
00816 /dev/md2 00816 3121 3072
00817 /dev/md2 00817 3109 3074
00818 /dev/md2 00818 3122 3080
00819 /dev/md2 00819 3128 3074
00820 /dev/md2 00820 3149 3076
00821 /dev/md2 00821 3141 3074
00822 /dev/md2 00822 3121 3070
00823 /dev/md2 00823 3129 3074
00824 /dev/md2 00824 3151 3072
00825 /dev/md2 00825 3129 3072
00826 /dev/md2 00826 3131 3074
00827 /dev/md2 00827 3137 3080
00828 /dev/md2 00828 3117 3076
00829 /dev/md2 00829 3107 3074
00830 /dev/md2 00830 3121 3074
00831 /dev/md2 00831 3153 3078
00832 /dev/md2 00832 238 82
00833 /dev/md2 00833 1946 1615
00834 /dev/md2 00834 3143 3072
00835 /dev/md2 00835 3129 3072
00836 /dev/md2 00836 3141 3070
00837 /dev/md2 00837 3165 3076
00838 /dev/md2 00838 3125 3070
00839 /dev/md2 00839 3137 3074
00840 /dev/md2 00840 3139 3072
00841 /dev/md2 00841 3133 3072
00842 /dev/md2 00842 3125 3074
00843 /dev/md2 00843 3131 3076
00844 /dev/md2 00844 3167 3074
00845 /dev/md2 00845 3109 3074
00846 /dev/md2 00846 3121 3070
00847 /dev/md2 00847 3119 3074
00848 /dev/md2 00848 3133 3072
00849 /dev/md2 00849 3117 3076
00850 /dev/md2 00850 3157 3074
00851 /dev/md2 00851 3151 3078
00852 /dev/md2 00852 3147 3082
00853 /dev/md2 00853 3129 3072
00854 /dev/md2 00854 3133 3074
00855 /dev/md2 00855 3105 3072
00856 /dev/md2 00856 3141 3074
00857 /dev/md2 00857 3127 3072
00858 /dev/md2 00858 3152 3072
00859 /dev/md2 00859 3112 3072
00860 /dev/md2 00860 3101 3070
00861 /dev/md2 00861 3141 3076
00862 /dev/md2 00862 3147 3072
00863 /dev/md2 00863 3165 3076
00864 /dev/md2 00864 214 1008
00865 /dev/md2 00865 62 0
00866 /dev/md2 00866 377 0
00867 /dev/md2 00867 128 3
00868 /dev/md2 00868 895 48
00869 /dev/md2 00869 1855 3015
00870 /dev/md2 00870 614 3169
00871 /dev/md2 00871 2919 4249
00872 /dev/md2 00872 3124 3204
00873 /dev/md2 00873 3136 3072
00874 /dev/md2 00874 3127 3074
00875 /dev/md2 00875 3093 3072
00876 /dev/md2 00876 3133 3074
00877 /dev/md2 00877 3137 3074
00878 /dev/md2 00878 3129 3074
00879 /dev/md2 00879 3153 3078
00880 /dev/md2 00880 3101 3070
00881 /dev/md2 00881 3113 3070
00882 /dev/md2 00882 3149 3078
00883 /dev/md2 00883 3117 3072
00884 /dev/md2 00884 3125 3070
00885 /dev/md2 00885 3137 3070
00886 /dev/md2 00886 3133 3074
00887 /dev/md2 00887 3127 3078
00888 /dev/md2 00888 3100 3070
00889 /dev/md2 00889 3140 3074
00890 /dev/md2 00890 3153 3076
00891 /dev/md2 00891 3131 3072
00892 /dev/md2 00892 3129 3074
00893 /dev/md2 00893 3135 3072
00894 /dev/md2 00894 3147 3076
00895 /dev/md2 00895 3133 3072
00896 /dev/md2 00896 116 113
00897 /dev/md2 00897 3037 3414
00898 /dev/md2 00898 3141 3074
00899 /dev/md2 00899 3113 3074
00900 /dev/md2 00900 3141 3072
00901 /dev/md2 00901 3127 3070
00902 /dev/md2 00902 3133 3076
00903 /dev/md2 00903 3145 3074
00904 /dev/md2 00904 3139 3072
00905 /dev/md2 00905 3121 3072
00906 /dev/md2 00906 3113 3072
00907 /dev/md2 00907 3137 3074
00908 /dev/md2 00908 3117 3070
00909 /dev/md2 00909 3123 3076
00910 /dev/md2 00910 3129 3070
00911 /dev/md2 00911 3145 3072
00912 /dev/md2 00912 3125 3070
00913 /dev/md2 00913 3137 3070
00914 /dev/md2 00914 3133 3070
00915 /dev/md2 00915 3133 3074
00916 /dev/md2 00916 3139 3070
00917 /dev/md2 00917 3129 3070
00918 /dev/md2 00918 3125 3070
00919 /dev/md2 00919 3141 3078
00920 /dev/md2 00920 3101 3072
00921 /dev/md2 00921 3101 3070
00922 /dev/md2 00922 2924 3072
00923 /dev/md2 00923 3129 3074
00924 /dev/md2 00924 3101 3074
00925 /dev/md2 00925 3137 3078
00926 /dev/md2 00926 3133 3072
00927 /dev/md2 00927 3117 3076
00928 /dev/md2 00928 104 180
00929 /dev/md2 00929 506 0
00930 /dev/md2 00930 1024 0
00931 /dev/md2 00931 1484 666
00932 /dev/md2 00932 3101 3072
00933 /dev/md2 00933 3127 3076
00934 /dev/md2 00934 3152 3074
00935 /dev/md2 00935 3132 3072
00936 /dev/md2 00936 3151 3080
00937 /dev/md2 00937 3125 3074
00938 /dev/md2 00938 3141 3072
00939 /dev/md2 00939 3139 3072
00940 /dev/md2 00940 3139 3070
00941 /dev/md2 00941 3165 3074
00942 /dev/md2 00942 3117 3074
00943 /dev/md2 00943 3125 3074
00944 /dev/md2 00944 3137 3070
00945 /dev/md2 00945 3137 3072
00946 /dev/md2 00946 3129 3070
00947 /dev/md2 00947 3117 3072
00948 /dev/md2 00948 3117 3070
00949 /dev/md2 00949 3127 3074
00950 /dev/md2 00950 3125 3070
00951 /dev/md2 00951 3121 3072
00952 /dev/md2 00952 3109 3074
00953 /dev/md2 00953 3133 3072
00954 /dev/md2 00954 3165 3078
00955 /dev/md2 00955 3141 3072
00956 /dev/md2 00956 3157 3074
00957 /dev/md2 00957 3163 3076
00958 /dev/md2 00958 3117 3072
00959 /dev/md2 00959 3169 3074
00960 /dev/md2 00960 104 590
00961 /dev/md2 00961 29 0
00962 /dev/md2 00962 688 0
00963 /dev/md2 00963 5 0
00964 /dev/md2 00964 1 0
00965 /dev/md2 00965 1 0
00966 /dev/md2 00966 1 0
00967 /dev/md2 00967 909 1197
00968 /dev/md2 00968 3376 5258
00969 /dev/md2 00969 3125 3695
00970 /dev/md2 00970 3129 3072
00971 /dev/md2 00971 3169 3078
00972 /dev/md2 00972 3113 3074
00973 /dev/md2 00973 3117 3076
00974 /dev/md2 00974 3121 3072
00975 /dev/md2 00975 3133 3072
00976 /dev/md2 00976 3165 3072
00977 /dev/md2 00977 3149 3074
00978 /dev/md2 00978 3101 3074
00979 /dev/md2 00979 3109 3072
00980 /dev/md2 00980 3125 3072
00981 /dev/md2 00981 3133 3076
00982 /dev/md2 00982 3137 3076
00983 /dev/md2 00983 3143 3070
00984 /dev/md2 00984 3137 3074
00985 /dev/md2 00985 3105 3072
00986 /dev/md2 00986 3109 3072
00987 /dev/md2 00987 3125 3076
00988 /dev/md2 00988 3117 3076
00989 /dev/md2 00989 3117 3074
00990 /dev/md2 00990 3115 3074
00991 /dev/md2 00991 3147 3074
00992 /dev/md2 00992 160 872
00993 /dev/md2 00993 91 0
00994 /dev/md2 00994 216 0
00995 /dev/md2 00995 19 0
00996 /dev/md2 00996 940 79
00997 /dev/md2 00997 968 63
00998 /dev/md2 00998 442 2423
00999 /dev/md2 00999 1533 5016
01000 /dev/md2 01000 3133 3883
01001 /dev/md2 01001 3119 3070
01002 /dev/md2 01002 3109 3072
01003 /dev/md2 01003 3171 3074
01004 /dev/md2 01004 3139 3072
01005 /dev/md2 01005 3133 3074
01006 /dev/md2 01006 3120 3072
01007 /dev/md2 01007 3110 3072
01008 /dev/md2 01008 3109 3072
01009 /dev/md2 01009 3117 3072
01010 /dev/md2 01010 3101 3072
01011 /dev/md2 01011 3135 3074
01012 /dev/md2 01012 3133 3074
01013 /dev/md2 01013 3145 3072
01014 /dev/md2 01014 3132 3074
01015 /dev/md2 01015 3124 3072
01016 /dev/md2 01016 3147 3070
01017 /dev/md2 01017 3157 3076
01018 /dev/md2 01018 3169 3072
01019 /dev/md2 01019 3125 3076
01020 /dev/md2 01020 3161 3072
01021 /dev/md2 01021 3143 3070
01022 /dev/md2 01022 3135 3074
01023 /dev/md2 01023 3117 3070
01024 /dev/md2 01024 1865 3361
01025 /dev/md2 01025 3579 5588
01026 /dev/md2 01026 3392 4411
01027 /dev/md2 01027 3367 4220
01028 /dev/md2 01028 3149 3512
01029 /dev/md2 01029 3141 3076
01030 /dev/md2 01030 3147 3074
01031 /dev/md2 01031 3160 3081
01032 /dev/md2 01032 3121 3071
01033 /dev/md2 01033 3125 3072
01034 /dev/md2 01034 3117 3074
01035 /dev/md2 01035 2885 3072
01036 /dev/md2 01036 2890 3074
01037 /dev/md2 01037 2541 3070
01038 /dev/md2 01038 2091 3074
01039 /dev/md2 01039 2332 3074
01040 /dev/md2 01040 2680 3070
01041 /dev/md2 01041 2122 3072
01042 /dev/md2 01042 2142 3074
01043 /dev/md2 01043 2106 3072
01044 /dev/md2 01044 2114 3074
01045 /dev/md2 01045 2385 3076
01046 /dev/md2 01046 2123 3074
01047 /dev/md2 01047 2559 3072
Maybe I should reboot, run bonnie and then [lp]vdisplay?
> I don't feel sure about your MD configuration either.
>
Which part are you unsure about? I configured partitions on both
disks identically, and combined identical partitions into RAID-1
devices.
> Hope that spots some light on those numbers which differ from mine
> (typically LVM gives a performamce enhancement for sequential input).
> The mapping overhead of the LVM1 driver is in the sub percent order.
>
Well, I suspected it must have been something I've done wrong,
but how do I fix this? Should I? Can it be?
Thanks,
Ron Arts
> Regards,
> Heinz -- The LVM Guy --
>
>
>>Regards,
>>Ron Arts
>>
>>
>>Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
>> -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
>>Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
>>nbs-126.offic 2008M 24005 99 66015 49 16148 7 27430 98 86915 15 369.0 1 single disk
>>nbs-126.offic 2G 23422 99 70919 58 23800 11 25289 86 101485 17 433.4 1 s/w RAID-1
>>nbs-126.offic 2G 8152 99 49897 94 23092 27 9122 92 78056 38 331.1 2 s/w RAID-1 + LVM
>>nbs-126.offic 4032M 19695 99 44056 42 14179 9 21526 94 86450 16 344.3 1 h/w RAID-1
>>nbs-126.offic 4032M 19916 99 24033 22 13343 9 22794 99 111662 30 388.5 1 h/w RAID-5
>> ------Sequential Create------ --------Random Create--------
>> -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
>>files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
>>nbs-126.office.n 16 2481 99 +++++ +++ +++++ +++ 2424 99 +++++ +++ 5508 98 single disk
>>nbs-126.office.n 16 2530 99 +++++ +++ +++++ +++ 2437 99 +++++ +++ 6062 100 s/w RAID-1 soft
>>nbs-126.office.n 16 800 99 +++++ +++ 12848 98 807 99 +++++ +++ 2591 99 s/w RAID-1 + LVM
>>nbs-126.office.n 16 2138 98 +++++ +++ 31126 98 2200 99 +++++ +++ 5322 98 h/w RAID-1
>>nbs-126.office.n 16 2182 99 +++++ +++ 27238 86 2172 98 +++++ +++ 5261 97 h/w RAID-5
>>
>>
>>Notes:
>>
>>The last two are with hardware RAID (GDT 4513RZ), and 2Gb RAM instead of 1, but I adjusted
>>the -s parameter for bonnie++ accordingly.
>>
>>commandline:
>># ./bonnie++ -d /tmp -s 2048 -x2 -uroot
>>Results shown are for the second run. Machines were otherwise inactive, and carried a
>>minimum install.
>
>
> *** Software bugs are stupid.
> Nevertheless it needs not so stupid people to solve them ***
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> Heinz Mauelshagen Sistina Software Inc.
> Senior Consultant/Developer Am Sonnenhang 11
> 56242 Marienrachdorf
> Germany
> Mauelshagen@Sistina.com +49 2626 141200
> FAX 924446
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
--
Netland Internet Services
bedrijfsmatige internetoplossingen
http://www.netland.nl Kruislaan 419 1098 VA Amsterdam
info: 020-5628282 servicedesk: 020-5628280 fax: 020-5628281
Look out for #1. Don't step in #2 either.
[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/x-pkcs7-signature, Size: 3291 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2002-10-17 10:51 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2002-10-15 17:39 [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Ron Arts
2002-10-16 3:28 ` Heinz J . Mauelshagen
2002-10-17 10:51 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad (LONG) Ron Arts
2002-10-16 3:57 ` [linux-lvm] performance comparison soft-hardware RAID + LVM: bad Jon Bendtsen
2002-10-16 11:04 ` Ron Arts
2002-10-17 4:19 ` [linux-lvm] performance comparison soft-hardware RAID + LVM:bad Jon Bendtsen
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.