[LU-2325] ZFS object creation is slow, causing many "Slow creates" messages

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Affects Version/s: Lustre 2.4.0
• Labels: shh
• Severity: 3
• Assignee: Alex Zhuravlev
• Reporter: Prakash Surya (Inactive)

Description

What is the usefulness of these messages:

Nov 13 16:29:07 grove402 kernel: Lustre: lstest-OST0192: Slow creates, 128/512 objects created at a rate of 2/s
Nov 13 16:42:05 grove402 kernel: Lustre: lstest-OST0192: Slow creates, 128/256 objects created at a rate of 2/s
Nov 13 16:48:25 grove501 kernel: Lustre: lstest-OST01f5: Slow creates, 128/512 objects created at a rate of 2/s

We see them constantly, and my assumption is they're due to normal load on the system. If that's the case, they should be removed.

Issue Links

• is duplicated by: LU-2122 Test failure on test suite parallel-scale, subtest test_compilebench
• is duplicated by: LU-2125 Test failure on test suite parallel-scale-nfsv4, subtest test_compilebench