[kudu-CR] Consider the available space when selecting data dirs for blocks.

["ZhangYao (Code Review)" <ge...@cloudera.org>]

Hello Yingchun Lai, Kudu Jenkins, Andrew Wong, Adar Dembo, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/13975

to look at the new patch set (#5).

Change subject: Consider the available space when selecting data dirs for blocks.
......................................................................

Consider the available space when selecting data dirs for blocks.

Randomly select two not full dir in tablet's data dir group  and then choose
the dir which has more free space.

Change-Id: I194c4965ee64aed728e3b84e684c04d445cbe529
---
M src/kudu/fs/data_dirs.cc
M src/kudu/fs/data_dirs.h
M src/kudu/util/env_util.cc
M src/kudu/util/env_util.h
4 files changed, 59 insertions(+), 27 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/75/13975/5
-- 
To view, visit http://gerrit.cloudera.org:8080/13975
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I194c4965ee64aed728e3b84e684c04d445cbe529
Gerrit-Change-Number: 13975
Gerrit-PatchSet: 5
Gerrit-Owner: ZhangYao <tr...@gmail.com>
Gerrit-Reviewer: Adar Dembo <ad...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Yingchun Lai <40...@qq.com>
Gerrit-Reviewer: ZhangYao <tr...@gmail.com>