Re: [zfs-discuss] Very poor small-block random write performance

2012-07-21 Thread Jim Klimov
2012-07-20 5:11, Bob Friesenhahn wrote: On Fri, 20 Jul 2012, Jim Klimov wrote: Zfs data block sizes are fixed size! Only tail blocks are shorter. This is the part I am not sure is either implied by the docs nor confirmed by my practice. But maybe I've missed something... This is something

Re: [zfs-discuss] Very poor small-block random write performance

2012-07-21 Thread Bob Friesenhahn
On Sat, 21 Jul 2012, Jim Klimov wrote: During this quick test I did not manage to craft a test which would inflate a file in the middle without touching its other blocks (other than using a text editor which saves the whole file - so that is irrelevant), in order to see if ZFS can "insert" smalle

Re: [zfs-discuss] Very poor small-block random write performance

2012-07-21 Thread Jim Klimov
2012-07-22 1:24, Bob Friesenhahn пишет: On Sat, 21 Jul 2012, Jim Klimov wrote: During this quick test I did not manage to craft a test which would inflate a file in the middle without touching its other blocks (other than using a text editor which saves the whole file - so that is irrelevant), i