[SLUG] raid1 mdadm or lvm mirror's
Hi I am in the process of rebuilding my server and I am planning my disk usage. I have 2 drives. Traditionally I would do 4 partitions to make up 4 md's md0 /boot ( ~ 500M - I like have space here) sda1 + sdb1 md1 / (~10G) sda2 + sdb2 md2 swap sda3 + sdb3 md3 LVM PV sda4 + sdb4 from the PV I make a VG and then lots of LV's I have used this sort of set for a while, but what I would like to do is not make md3 and instead use sda4 + sdb4 as 2 PV and then I get the chance to decide which pv is made up of mirrored space and which is not. I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? Alex signature.asc Description: Digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Wed, Oct 17, 2007 at 07:47:35PM +1000, Alex Samad wrote: [ ...] I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? I think if I was to mirror on my home machine now, I would do lv mirroring for the reason you mention; you just don't need everything mirrored. In fact I don't mirror at all at the moment; I just rsync the more valuable stuff. Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Wed, Oct 17, 2007 at 10:32:02PM +1000, Matthew Hannigan wrote: On Wed, Oct 17, 2007 at 07:47:35PM +1000, Alex Samad wrote: [ ...] I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? I think if I was to mirror on my home machine now, I would do lv mirroring for the reason you mention; you just don't need everything mirrored. but how stable is lvm mirror any one using this in production In fact I don't mirror at all at the moment; I just rsync the more valuable stuff. oh I sing as well, both on site and offsite (hate trying to find stuff or recreate it and 500Gb drives for $120...) Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html signature.asc Description: Digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Thu, Oct 18, 2007 at 07:08:25AM +1000, Alex Samad wrote: but how stable is lvm mirror any one using this in production I dunno. I'm taking the fact that it's standard in major distros as an indication that it's pretty mature and reliable. I could be wrong! Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
Matthew == Matthew Hannigan [EMAIL PROTECTED] writes: Matthew On Thu, Oct 18, 2007 at 07:08:25AM +1000, Alex Samad wrote: but how stable is lvm mirror any one using this in production Matthew I dunno. I'm taking the fact that it's standard in major Matthew distros as an indication that it's pretty mature and Matthew reliable. We've been doing a few performance measurements (as part of our research). LVM underperforms compared with the same mirroring/striping arrangement set up with md. We're still trying to work out why... (and fix it, of course). The data is still *very* preliminary, and may change as we do more experiments. Peter C -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
