[lustre-discuss] zfs -- mds/mdt -- ssd model / type recommendation

[Isaac Huang]

On Tue, May 05, 2015 at 05:16:14PM +0000, Alexander I Kulyavtsev wrote:
> ......
> Shall we use smaller ZFS record size on MDT, say 8KB or 16KB? If inode is ~10KB and zfs record 128KB, we are dropping caches and read data we do not need.

The ZFS recordsize does not affect Lustre OST/MDT. The Lustre osd-zfs
driver sets block sizes for its objects regardless of the ZFS
recordsize. See:
https://jira.hpdd.intel.com/browse/LU-4865
https://jira.hpdd.intel.com/browse/LU-5391

-Isaac