[zfs-discuss] When is it okay to turn off the verify option.

2010-10-04 Thread Peter Taps
Folks, As I understand, the hash generated by sha256 is almost guaranteed not to collide. I am thinking it is okay to turn off verify property on the zpool. However, if there is indeed a collision, we lose data. Scrub cannot recover such lost data. I am wondering in real life when is it okay

Re: [zfs-discuss] When is it okay to turn off the verify option.

2010-10-04 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Peter Taps As I understand, the hash generated by sha256 is almost guaranteed not to collide. I am thinking it is okay to turn off verify property on the zpool. However, if there is indeed a

Re: [zfs-discuss] When is it okay to turn off the verify option.

2010-10-04 Thread Scott Meilicke
Why do you want to turn verify off? If performance is the reason, is it significant, on and off? On Oct 4, 2010, at 2:28 PM, Edward Ned Harvey wrote: From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Peter Taps As I understand, the hash

Re: [zfs-discuss] When is it okay to turn off the verify option.

2010-10-04 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Scott Meilicke Why do you want to turn verify off? If performance is the reason, is it significant, on and off? Under most circumstances, verify won't hurt performance. It won't hurt reads