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From "Tim Armstrong (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-4623: Thread level file handle caching
Date Tue, 28 Mar 2017 01:28:45 GMT
Tim Armstrong has posted comments on this change.

Change subject: IMPALA-4623: Thread level file handle caching
......................................................................


Patch Set 1:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/6478/1/be/src/runtime/disk-io-mgr.h
File be/src/runtime/disk-io-mgr.h:

Line 233:   /// This is a single-threaded LRU cache for Hdfs file handles. The cache creates
and
> each thread needs its own file handle in order to get accurate io stats.
I guess I was thinking that each thread would temporarily check out a file handle from a shared
cache.

Anyway, it sounds like you may have some other ideas for tackling the problem.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ibe5ff60971dd653c3b6a0e13928cfa9fc59d078d
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Joe McDonnell <joemcdonnell@cloudera.com>
Gerrit-Reviewer: Marcel Kornacker <marcel@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-HasComments: Yes

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