Hi,
I'm running a somewhat recent version of STABLE-13/amd64:
stable/13-n256681-0b7939d725ba: Fri Nov 10 08:48:36 NZDT 2023, and I'm
seeing some unusual behaviour with ZFS.
To reproduce:
1. one big empty disk, GPT scheme, 1 freebsd-zfs partition.
2. create a zpool, eg: tank
3. create 2 sub-filesystems, eg: tank/one, tank/two
4. fill each sub-filesystem with large files until the pool is ~80%
full. In my case I had 200 10Gb files in each.
5. in one session run 'md5 tank/one/*'
6. in another session run 'md5 tank/two/*'
For most of my runs, one of the sessions against a sub-filesystem will
be starved of I/O, while the other one is performant.
Is anyone else seeing this?
--
Jonathan Chen <[email protected]>
