RE: reiserfs with mosix ?

RE: reiserfs with mosix ?

[Barry, Christopher]

Nope. You'll need Sistina's GFS for that. Also, do to locking semantics, I'm unsure of the effectiveness of this arrangement with Samba. You'll need to verify it with Sistina. Also, the power of MOSIX is in many small long-duration processes that can be migrated from the initial starting host to other MOSIX enabled machines. I'm not sure that the scenario you articulate would be a good fit for this. Possibly LVS or Heartbeat would be a better fit.

Regards,

--
Christopher Barry
Manager of Information Systems
InfiniCon Systems
http://www.infiniconsys.com



-----Original Message-----
From: ipguy [mailto:ipguy@optushome.com.au]
Sent: Monday, July 14, 2003 8:03 AM
To: reiserfs
Subject: reiserfs with mosix ?


hi all
i'm thinking of building a mosix cluster using the "reiserfs" and am
enquiring about weather the fs is able to be used as a global fs ?
specifically, i'm setting up two samba servers with a mosix cluster
connected to a single raid array..

-ipguy

RE: reiserfs with mosix ?

[Lars Grobe]

> Nope. You'll need Sistina's GFS for that. Also, do to locking semantics,  
> I'm unsure of the effectiveness of this arrangement with Samba. You'll  
> need to verify it with Sistina. Also, the power of MOSIX is in many  
> small long-duration processes that can be migrated from the initial  
> starting host to other MOSIX enabled machines. I'm not sure that the  
> scenario you articulate would be a good fit for this. Possibly LVS or  
> Heartbeat would be a better fit. 
 
Hi! 
 
If there is need of a shared fs, the solution is gfs or opengfs (the free 
one ;-). If it is sufficient to share a fs over the network, mosix brings 
it's own mfs which provides you with the same representation of your date 
on all cluster nodes. If it is ok to have volume A served by server A and 
volume B by server B (if you can divide your data into two sets), reiserfs 
is fine. 
 
We are currently evaluating a configuration with two servers (one samba, 
the other one netatalk and nfs) accessing a shared gfs (sistina) on a 
fibrechannel storage. If we decide not to choose this, we will divide 
data in sets and export some volumes from one, other from the second 
server - this would keep us using reiserfs on the file server ;-) 
 
I know that there have been tests with mosix in storage / file server 
applications, and I have a pdf here, if someone is interested, tell me - 
I certainly won't post it to the whole list ;-))) 
 
One last - reiserfs patches and mosix patches coexist friendly here. 
 
CU Lars. 

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New Reiser4 snapshot?

[David Nielsen]

New to the list, so I'm sorry if this has been asked previously

With the arrivial of 2.6.0-test1 can we expect a snapshot of Reiser4
anytime soon for those of us who likes to break our boxes ?

I know this is a long shot, but have ReiserFS3 on a EVMS2 based RAID0
(RAID1 for /boot)  and I would really hate to have to reinstall my
entire system - is there an easy way to convert my current FS to Reiser4
or is using a tool like Mondo or tar the only way ? 

Regards 
David Nielsen

Re: New Reiser4 snapshot?

[Yury Umanets]

David Nielsen wrote:

>New to the list, so I'm sorry if this has been asked previously
>
>With the arrivial of 2.6.0-test1 can we expect a snapshot of Reiser4
>anytime soon for those of us who likes to break our boxes ?
>
We are considering about making some.

>
>I know this is a long shot, but have ReiserFS3 on a EVMS2 based RAID0
>(RAID1 for /boot)  and I would really hate to have to reinstall my
>entire system - is there an easy way to convert my current FS to Reiser4
>or is using a tool like Mondo or tar the only way ? 
>
You probably need in-place convertation. Yes, there is one way. You need 
to do something like this:

(1) Build-in reiser4 into you kernel.
(2) Create file, that consists of holes on you reiser3 partition by 
means of using dd command. Say reiser4.img. It should have size that is 
enough for you data on /boot

(3) Create reiser4 in reiser4.img. Use reiser4progs from our ftp.
(4) Mount reiser4 to somewhere, say, /mnt/reiser4
(5) Copy all files from /boot to /mnt/reiser4
(6) When copy is finished, you have reiser3 partition with one big file 
on it and all you need to do is to remap /boot/reiser4.img to device, 
/boot lies on. I mean, say reiser4.img file starts from 345 block and 
has 3456 contiguous blocks next to 345. You need to move blocks starting 
from 345 to block 0 on your device.

Actually it may be done by some program, which uses FIBMAP ioctl for 
getting block numbers and move them to new location. Bu we have not such 
a program. May be convertfs will help you. google it :)

>
>Regards 
>David Nielsen
>
>
>
>  
>


-- 
Yury Umanets
"We're flying high, we're watching the world passes by..."