Andrew Wong has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/7028

Change subject: disk failure: make DataDirManager failure-aware
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disk failure: make DataDirManager failure-aware

The DataDirManager must record what directories are unhealthy in order
to avoid placing new data on failed disks. This patch achieves this by
maintaining a set of UUID indices in the DataDirManager that correspond
to failed directories.

Tests are added to data_dirs-test to ensure that failed directories are
not used and are not returned as part of newly created DataDirGroups. If
no healthy directories exist, callers will return an IOError with posix
code ENODEV.

Change-Id: Iee212793152de5de5198751d649ab34fb97f6aa2
---
M src/kudu/fs/data_dirs-test.cc
M src/kudu/fs/data_dirs.cc
M src/kudu/fs/data_dirs.h
3 files changed, 126 insertions(+), 8 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/28/7028/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iee212793152de5de5198751d649ab34fb97f6aa2
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Andrew Wong <aw...@cloudera.com>

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