[LU-8150] Track creates in MDS stats

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.8.0
• Labels: patch
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Matt Ezell

Description

File creates are not tracked on the MDS in the md_stats file:

# lctl set_param mdt.*.md_stats=clear
mdt.lustre-MDT0000.md_stats=clear
# touch /mnt/lustre/newfile1
# lctl get_param mdt.*.md_stats
mdt.lustre-MDT0000.md_stats=
snapshot_time             1463430465.508409 secs.usecs
open                      1 samples [reqs]
close                     1 samples [reqs]
getattr                   1 samples [reqs]
setattr                   1 samples [reqs]
getxattr                  1 samples [reqs]
setxattr                  1 samples [reqs]

If you call mknod() with S_IFREG to create a file, it is tracked as a mknod. Most file creates are from open with create intent.

Issue Links

• is related to: LU-8335 Interop - b2_8<->master : sanity test_133a: The mknod counter on mds1 is wrong - expected 1