Jan 14 09:32:32 [aixsyd] i decided to use that problem 2950 as a VM hypervisor - and im getting TERRIBLE read/writes. like.. sub-MB/s
Jan 14 09:32:42 [aixsyd] so something's fucked. not sure what
Jan 14 09:32:54 [rkeene] What filesystem are you using ?
Jan 14 09:33:00 [rkeene] Or just LVM ?
Jan 14 09:33:03 [aixsyd] ext3
Jan 14 09:33:37 [linedash] hrm; okay so it's a 2950 - how many drives and in what configuration and with what raid card (if any) ?
Jan 14 09:33:57 [aixsyd] 2 drives in a raid1 perc6i integrated
Jan 14 09:34:20 [linedash] do you have omreport installed?
Jan 14 09:34:25 [linedash] i.e; the dell OMSA stuff
Jan 14 09:34:29 [aixsyd] negative not familiar
Jan 14 09:34:32 [linedash] what OS?
Jan 14 09:34:35 [aixsyd] Debian
Jan 14 09:34:37 [rkeene] Are you using hardware RAID ?
Jan 14 09:34:41 [aixsyd] rkeene: yar
Jan 14 09:34:42 [Sp00n] perc6 is hardware yes
Jan 14 09:34:45 [rkeene] (Hardware RAID is terrible, never use it)
Jan 14 09:34:54 [linedash] aixsyd : http://linux.dell.com/repo/community/deb/
Jan 14 09:34:59 [aixsyd] rkeene: if you say ZFS im going to beat you
Jan 14 09:35:04 [linedash] this will let you poll the state of the array
Jan 14 09:35:14 [linedash] and lol @ hardware RAID being terrible
Jan 14 09:35:16 [tcpsyn] if you say Reiser, he's going to kill you.
Jan 14 09:35:32 [linedash] hardware is not terrible
Jan 14 09:35:38 [linedash] hardware raid*
Jan 14 09:36:02 [linedash] aixsyd, I got the link wrong there - http://linux.dell.com/repo/community/ubuntu/ (it'll work under debian fine)
Jan 14 09:36:14 [rkeene] linedash, Yes, it is (*EXCEPT* on the REALLY high end, i.e., as part of a SAN on a high-end device like a Hitachi USP-V)
Jan 14 09:36:25 [toshalot] How so?
Jan 14 09:36:28 [toshalot] Why is it terrible?
Jan 14 09:36:29 [linedash] rkeene, what's your rationale?
Jan 14 09:36:50 [rkeene] linedash, It's slow, tied to a particular implementation, less featureful, really there's nothing good about it
Jan 14 09:36:52 [tcpsyn] it's not terrible. He's prolly thinking of fakeraid in consumer level bioses.
Jan 14 09:36:59 [linedash] no doubt
Jan 14 09:37:03 [linedash] rkeene, flat out - you are wrong.
Jan 14 09:37:08 * Sp00n grabs popcorn
Jan 14 09:37:21 [rkeene] linedash, I'm not wrong.
Jan 14 09:37:23 [linedash] hardware raid has many purposes - we make heavy use of it for medium end database servers
Jan 14 09:37:30 [linedash] where software raid would have long prior crapped itself
Jan 14 09:37:39 [tcpsyn] rkeene: yeah, he's right. You are wrong.
Jan 14 09:37:58 [linedash] and slow? It's faster than software and that's all you can really compare it to
Jan 14 09:38:11 [aixsyd] heres what we should ask
Jan 14 09:38:13 [linedash] tied to a particular implementation, yes - no denying that
Jan 14 09:38:16 [aixsyd] rkeene: - whats better?
Jan 14 09:38:35 * aixsyd gets a lawn chair
Jan 14 09:38:36 [linedash] again? Did I argue with him about something else previously?
Jan 14 09:38:44 [tcpsyn] argued with me
Jan 14 09:38:51 [tcpsyn] and he was right
Jan 14 09:38:54 [tcpsyn] like he is now
Jan 14 09:38:54 [linedash] lol:)
Jan 14 09:38:56 [rkeene] linedash, Software RAID is definitely faster.
Jan 14 09:39:00 * linedash blinks
Jan 14 09:39:01 [aixsyd] LOOOOOOOOL
Jan 14 09:39:09 [linedash] rkeene; go back to the helldesk
Jan 14 09:39:10 [aixsyd] hes gonna say ZFS
Jan 14 09:39:20 [tcpsyn] troll
Jan 14 09:39:23 [aixsyd] rkeene: say ZFS
Jan 14 09:39:24 [rkeene] aixsyd, ZFS is slow (it's point is reliability, not speed)
Jan 14 09:39:31 [linedash] software raid is not faster than hardware raid - especially once you start pushing high amounts of IO and the cpu load rises
Jan 14 09:39:37 [aixsyd] ^^^^^^^^^^^
Jan 14 09:39:45 [linedash] in fact, once you start getting near the higher IO usage - software raid craps itself
Jan 14 09:39:53 [linedash] where hardware will happily keep ticking along
Jan 14 09:40:09 [Kum0rigoe] ...did I just see what I think I saw?
Jan 14 09:40:23 * Shoh is now known as Shohheueh
Jan 14 09:40:29 [rkeene] linedash, Software RAID has faster CPUs which you can upgrade.
Jan 14 09:40:29 [Shohheueh] See Kum0rigoe, I aint as bad as rkeene
Jan 14 09:40:31 * Shohheueh is now known as Shoh
Jan 14 09:40:40 * linedash beats head off desk
Jan 14 09:40:44 [tcpsyn] if you want fast reliable storage, you want software raid and zfs. Duh.
Jan 14 09:40:48 * aixsyd slits wrist
Jan 14 09:40:52 [Kum0rigoe] Oh, this shit's DEFINITELY going in the blog...
Jan 14 09:41:02 [linedash] rkeene; you fundamentally do not understand how hardware raid works. I'm not going to have a technical argument with someone ignorant to that.
Jan 14 09:41:19 [Kum0rigoe] Someone call Nexsan, tell them they're out of business.
Jan 14 09:41:20 [rkeene] linedash, As someone who has implemented RAID drivers, I definitely understand how it works.
Jan 14 09:41:25 [tcpsyn] there's no argument.
Jan 14 09:41:29 [tcpsyn] he's a fool.
Jan 14 09:42:00 [rkeene] http://rkeene.org/projects/info/wiki/213
Jan 14 09:42:18 [Kum0rigoe] And his proof is a link to a personal site.
Jan 14 09:42:22 [Kum0rigoe] That's legit
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