Re: [zfs-discuss] Performance problems with Thumper and 7TB ZFS pool using RAIDZ2

2009-10-26 Thread Marion Hakanson
opensolaris-zfs-disc...@mlists.thewrittenword.com said: Is it really pointless? Maybe they want the insurance RAIDZ2 provides. Given the choice between insurance and performance, I'll take insurance, though it depends on your use case. We're using 5-disk RAIDZ2 vdevs. . . . Would love to

Re: [zfs-discuss] Performance problems with Thumper and 7TB ZFS pool using RAIDZ2

2009-10-25 Thread Jeff Savit
On 10/24/09 12:31 PM, Jim Mauro wrote: Posting to zfs-discuss. There's no reason this needs to be kept confidential. okay. 5-disk RAIDZ2 - doesn't that equate to only 3 data disks? Seems pointless - they'd be much better off using mirrors, which is a better choice for random IO... Hmm,

Re: [zfs-discuss] Performance problems with Thumper and 7TB ZFS pool using RAIDZ2

2009-10-24 Thread Jim Mauro
Posting to zfs-discuss. There's no reason this needs to be kept confidential. 5-disk RAIDZ2 - doesn't that equate to only 3 data disks? Seems pointless - they'd be much better off using mirrors, which is a better choice for random IO... Looking at this now... /jim Jeff Savit wrote: Hi all,

Re: [zfs-discuss] Performance problems with Thumper and 7TB ZFS pool using RAIDZ2

2009-10-24 Thread Albert Chin
On Sat, Oct 24, 2009 at 03:31:25PM -0400, Jim Mauro wrote: Posting to zfs-discuss. There's no reason this needs to be kept confidential. 5-disk RAIDZ2 - doesn't that equate to only 3 data disks? Seems pointless - they'd be much better off using mirrors, which is a better choice for random

Re: [zfs-discuss] Performance problems with Thumper and 7TB ZFS pool using RAIDZ2

2009-10-24 Thread Bob Friesenhahn
On Sat, 24 Oct 2009, Albert Chin wrote: 5-disk RAIDZ2 - doesn't that equate to only 3 data disks? Seems pointless - they'd be much better off using mirrors, which is a better choice for random IO... Is it really pointless? Maybe they want the insurance RAIDZ2 provides. Given the choice