Todd Lipcon has posted comments on this change. ( http://gerrit.cloudera.org:8080/11190 )
Change subject: file_cache: stop using sync_on_close when reopening evicted files ...................................................................... Patch Set 2: (2 comments) http://gerrit.cloudera.org:8080/#/c/11190/2//COMMIT_MSG Commit Message: http://gerrit.cloudera.org:8080/#/c/11190/2//COMMIT_MSG@11 PS2, Line 11: However, with its removal in commit 9a07b2fed, sync_on_close=true : should no longer be necessary for correctness. > Yes, that is the expectation, but I can't imagine how it would have been sa Yea, that makes sense. I forgot that the file cache doesn't allow a way for an "opener" to specify sync_on_close. Recently I've seen a few cases where it oddly looked like blocks weren't getting fsynced where I thought they might have. Is it possible we are missing Sync somewhere because in a pre-filecache-world we relied on sync_on_close? http://gerrit.cloudera.org:8080/#/c/11190/2//COMMIT_MSG@16 PS2, Line 16: An unnecessary fdatasync system call should no-op, but maybe : that's not the case on older kernels? > Yeah that's a conceivable explanation. Or maybe on old kernels an fdatasync possible, yea -- To view, visit http://gerrit.cloudera.org:8080/11190 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I845f39ea202ec0cb46ce8e841c6cfb6c3a8dad2c Gerrit-Change-Number: 11190 Gerrit-PatchSet: 2 Gerrit-Owner: Adar Dembo <[email protected]> Gerrit-Reviewer: Adar Dembo <[email protected]> Gerrit-Reviewer: Alexey Serbin <[email protected]> Gerrit-Reviewer: Kudu Jenkins Gerrit-Reviewer: Todd Lipcon <[email protected]> Gerrit-Comment-Date: Fri, 10 Aug 2018 22:28:17 +0000 Gerrit-HasComments: Yes
