[LU-4009] Add ZIL support to osd-zfs

• Type: Improvement
• Resolution: Unresolved
• Priority: Critical
• Affects Version/s: Lustre 2.4.1
• Labels: llnl prz zfs

Epic/Theme

Performance prz zfs

• Assignee: Alex Zhuravlev
• Reporter: Brian Behlendorf

Description

In order to improve sync performance on ZFS based OSDs Lustre must be updated to utilize a ZFS ZIL device. This performance work was originally planned as part of Lustre/ZFS integration but has not yet been completed. I'm opening this issue to track it.

Issue Links

• is blocked by: LU-4215 Some expected improvements for OUT
• is blocking: LU-2887 sanity-quota test_12a: slow due to ZFS VMs sharing single disk
• is blocking: LU-7895 zfs metadata performance improvements
• is related to: LU-2716 DNE on ZFS create remote directory suffers from long sync.
• is related to: LU-6836 sanity-quota test_4a: Passed grace time 12, 1436542665, 1436542679
• is related to: LU-10392 LustreError: 82980:0:(fid_handler.c:329:__seq_server_alloc_meta()) srv-lglossy-MDT0002: Allocated super-sequence failed: rc = -115
• is related to: LU-2085 sanityn test_16 (fsx) ran over its Autotest time
• is related to: LU-7426 DNE3: Current llog format for remote update llog
• is related to: LU-14678 ldiskfs fast commit feature