Re: [zfs-discuss] Pathological ZFS performance

2007-03-30 Thread Robert Thurlow
Bill Sommerfeld wrote: On Fri, 2007-03-30 at 06:12 -0600, Robert Thurlow wrote: Last night, after moving the drives, I started a scrub. It's still running. At 20 hours, I was up to 57.75%, and had 14.5 hours left. Do you have any cron jobs which are creating periodic snapshots? No, not in

Re: [zfs-discuss] Pathological ZFS performance

2007-03-30 Thread Bill Sommerfeld
On Fri, 2007-03-30 at 06:12 -0600, Robert Thurlow wrote: > Last night, after moving the > drives, I started a scrub. It's still running. At 20 hours, I > was up to 57.75%, and had 14.5 hours left. Do you have any cron jobs which are creating periodic snapshots? If so, you may be hitting: 6343

Re: [zfs-discuss] Pathological ZFS performance

2007-03-30 Thread Constantin Gonzalez
Hi, If all of the four drives really hang off of one ATA-Controller, they may all be stepping on each other's feet as it is a blocking bus protocol. There's a speed discussion in the ATA article on Wikipedia: http://en.wikipedia.org/wiki/AT_Attachment My current machine (W1100z) has 4 internal

[zfs-discuss] Pathological ZFS performance

2007-03-30 Thread Robert Thurlow
Hi folks, In some prior posts, I've talked about trying to get four IDE drives in a Firewire case working. Yesterday, I bailed out due to hangs, filed 6539587, and moved the drives inside my Opteron box, hanging off one of these: http://www.newegg.com/Product/Product.asp?Item=N82E16816124001 N