[LU-1956] Test failure on test suite sanity, subtest test_156 Created: 16/Sep/12  Updated: 19/Nov/12  Resolved: 19/Nov/12

Status: Resolved
Project: Lustre
Component/s: None
Affects Version/s: Lustre 2.4.0
Fix Version/s: Lustre 2.4.0

Type: Bug Priority: Blocker
Reporter: Maloo Assignee: Nathaniel Clark
Resolution: Fixed Votes: 0
Labels: NFBlocker, USE_OFD, zfs

Severity: 3
Rank (Obsolete): 5119

 Description   

This issue was created by maloo for Li Wei <liwei@whamcloud.com>

This issue relates to the following test suite run: https://maloo.whamcloud.com/test_sets/f1cbcf24-fe85-11e1-b4cd-52540035b04c.

The sub-test test_156 failed with the following error:

NOT IN CACHE: before: , after:

Info required for matching: sanity 156



 Comments   
Comment by Li Wei (Inactive) [ 16/Sep/12 ]

https://maloo.whamcloud.com/test_sets/29df0cfe-fedc-11e1-b4cd-52540035b04c

This was b2_3 with OFD and ZFS OSTs.

Comment by Jian Yu [ 19/Sep/12 ]

Lustre Build: http://build.whamcloud.com/job/lustre-b2_3/19
USE_OFD=yes
OSTFSTYPE=zfs
LOAD_MODULES_REMOTE=true
https://maloo.whamcloud.com/test_sets/ff130926-0241-11e2-ab94-52540035b04c

Comment by Li Wei (Inactive) [ 09/Oct/12 ]

https://maloo.whamcloud.com/test_sets/9d098640-11fc-11e2-a663-52540035b04c

Comment by Li Wei (Inactive) [ 16/Oct/12 ]

https://maloo.whamcloud.com/test_sets/1813180e-172c-11e2-afe1-52540035b04c

Comment by Li Wei (Inactive) [ 16/Oct/12 ]

Prompted to Blocker for 2.4.

Comment by Andreas Dilger [ 19/Oct/12 ]

Li Wei, in the future can you please include more of the test output details of the test failure. Otherwise it is more difficult to understand the problem and do bug triage than needed.

Comment by Nathaniel Clark [ 01/Nov/12 ]

The osd code for ZFS code does not count cache hits, misses or accesses. Adding that all cache accesses are misses will still cause test 156 to fail since it expects cache_hits to increase when readcache is enabled.

Is this really a blocker? Should it be recharacterized as a feature enhancement to add read/write cache stats to ZFS?

Comment by Andreas Dilger [ 02/Nov/12 ]

If the problem is understood, then all that is needed is to skip the test case for ZFS, checking $(facet_fstype ost1) == ZFS, with a comment explaining why, and referencing this bug.

Comment by Nathaniel Clark [ 02/Nov/12 ]

master: http://review.whamcloud.com/4448

Also created LU-2261 enhancement to add caching stats to osd-zfs

Comment by Peter Jones [ 19/Nov/12 ]

Landed for 2.4

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