[LU-9365] Sync data before get df data

• Status: Closed
• Project: Lustre
• Type: Bug
• Priority: Minor
• Reporter: Yang Sheng
• Assignee: Yang Sheng
• Resolution: Not a Bug
• Severity: 3

Description

== sanity test 311: disable OSP precreate, and unlink should destroy objs ============================ 22:16:56 (1481926616)
total: 1000 creates in 3.08 seconds: 325.07 creates/second
 - unlinked 0 (time 1481926620 ; total 0 ; last 0)
total: 1000 unlinks in 2 seconds: 500.000000 unlinks/second
waited 120 sec, old Iused 5991, new Iused 9110
 sanity test_311: @@@@@@ FAIL: objs not destroyed after unlink 
  Trace dump:
  = /usr/lib64/lustre/tests/test-framework.sh:4970:error()
  = /usr/lib64/lustre/tests/sanity.sh:14395:test_311()
  = /usr/lib64/lustre/tests/test-framework.sh:5230:run_one()
  = /usr/lib64/lustre/tests/test-framework.sh:5268:run_one_logged()
  = /usr/lib64/lustre/tests/test-framework.sh:5072:run_test()
  = /usr/lib64/lustre/tests/sanity.sh:14397:main()
Dumping lctl log to /tmp/test_logs/1481926605/sanity.test_311.*.1481926744.log

After investigating i think statfs doesn't update in timely manner. So first 'lfs df' may not reflect real filesystem statistic. So we should consider doing a sync action while 'lfs df' in first place. Will push a patch for it.

Issue Links

• is related to: LU-5788 recovery-double-scale test_pairwise_f...

Comments

[Gerrit Updater]

Yang Sheng ([e-mail]) uploaded a new patch: https://review.whamcloud.com/26762
Subject: LU-9365 tests: sync data before get df data
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 1519303eced864f1bf9726bc34ab553af30433ce

[Andreas Dilger]

I don't think "sync" will affect the inode counts on the ldiskfs MDS, since they are not cached by the clients. All file creates are done immediately on the MDS so "lfs df -i" should always be accurate.