From: "Mathias Burén" <mathias.buren@gmail.com>
To: Roberto Spadim <roberto@spadim.com.br>
Cc: Steven Haigh <netwiz@crc.id.au>, linux-raid@vger.kernel.org
Subject: Re: debian software raid1
Date: Tue, 19 Apr 2011 23:05:27 +0100 [thread overview]
Message-ID: <BANLkTik02c1OOvq8TBisfo4+KXFBCgNKzA@mail.gmail.com> (raw)
In-Reply-To: <BANLkTin8MgBDixExj+qygshM_oMjTS1emg@mail.gmail.com>
On 19 April 2011 23:01, Roberto Spadim <roberto@spadim.com.br> wrote:
> hum, some doubts....
> what´s better (faster / secure)?
> swap over one disk (no raid)
> swap over one md raid1
> swap over one md raid0
> swap over one md raid10
> swap over one md raid5
> swap over one md raid6
>
>
>
> 2011/4/19 Steven Haigh <netwiz@crc.id.au>:
>> On 20/04/2011 7:10 AM, Gordon Henderson wrote:
>>>
>>> I'm actually of the opinion that to NOT put swap on RAID in an otherwise
>>> RAIDed system is just plain silly. Do it. You know it makes sense!
>>
>> I think the preferred method at the moment (and at least for 2010/2011) is
>> to have a smallish RAID1 partition for /boot then create a second RAID array
>> for everything else and use LVM on top of that.
>>
>> That allows you to have the host on the same RAID1 and use the flexibility
>> to use LVM for all your other requirements.
>>
>> I personally run a Xen virtualisation server - it has the following:
>> /dev/md0 - /boot - 512Mb - RAID1
>> /dev/md1 - VG 'RAID1' - rest of disk - RAID1
>> /dev/md2 - VG 'RAID5' - 3 x 1Tb whole disks - RAID5
>>
>> Then the majority of the 7 VMs on that machine live on the RAID5 VG (with
>> one special case that is on the RAID1 VG) and it runs very happily.
>>
>> The swap and root of Dom0 is on the RAID1 VG. This seems to be the best way
>> I've found to have the most flexibility and not have to change things as
>> time progresses.
>>
>> --
>> Steven Haigh
>>
>> Email: netwiz@crc.id.au
>> Web: http://www.crc.id.au
>> Phone: (03) 9001 6090 - 0412 935 897
>> Fax: (03) 8338 0299
>>
>> There are no great men, only great challenges that ordinary men are forced
>> by circumstances to meet. -- Admiral William Halsey
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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>>
>
>
>
> --
> Roberto Spadim
> Spadim Technology / SPAEmpresarial
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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>
You can't say "faster/secure", it's mostly either one. Swap over raid0
or some raid10 implementation would probably be the fastest. Swap on
raid456 would be incredibly slow write wise...
// M
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next prev parent reply other threads:[~2011-04-19 22:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-19 12:12 debian software raid1 b2
2011-04-19 12:25 ` Mathias Burén
2011-04-19 16:03 ` Iordan Iordanov
2011-04-19 21:10 ` Gordon Henderson
2011-04-19 21:33 ` Steven Haigh
2011-04-19 22:01 ` Roberto Spadim
2011-04-19 22:05 ` Mathias Burén [this message]
2011-04-19 22:51 ` NeilBrown
2011-04-20 0:33 ` Joe Landman
2011-04-20 1:12 ` NeilBrown
2011-04-20 14:59 ` Iordan Iordanov
2011-04-20 14:51 ` Iordan Iordanov
2011-04-21 6:15 ` Luca Berra
2011-04-21 14:50 ` Iordan Iordanov
2011-04-22 5:59 ` Luca Berra
2011-04-22 19:19 ` Iordan Iordanov
2011-04-22 19:28 ` Mikael Abrahamsson
2011-04-23 0:07 ` Iordan Iordanov
2011-04-20 10:28 ` Asdo
2011-04-20 12:40 ` NeilBrown
2011-04-23 8:33 ` Jan Ceuleers
2011-04-22 19:21 ` Iordan Iordanov
2011-04-22 22:12 ` NeilBrown
2011-04-23 0:05 ` Iordan Iordanov
2011-04-23 12:54 ` David Brown
2011-04-23 14:23 ` Keld Jørn Simonsen
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