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https://issues.apache.org/jira/browse/HBASE-16398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15753793#comment-15753793
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Hudson commented on HBASE-16398:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2140 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2140/])
HBASE-16398 optimize HRegion computeHDFSBlocksDistribution (binlijin: rev
6acbee179feca63d12ea3fff6e9f25a5c044c467)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSUtils.java
> optimize HRegion computeHDFSBlocksDistribution
> ----------------------------------------------
>
> Key: HBASE-16398
> URL: https://issues.apache.org/jira/browse/HBASE-16398
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver
> Affects Versions: 2.0.0, 1.4.0
> Reporter: binlijin
> Assignee: binlijin
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-16398.branch-1.v1.patch, HBASE-16398.patch,
> HBASE-16398_v2.patch, HBASE-16398_v3.patch, HBASE-16398_v4.patch,
> HBASE-16398_v5.patch, LocatedBlockStatusComparison.java
>
>
> First i assume there is no reference and link in a region family's directory.
> Without the patch to computeHDFSBlocksDistribution for a region family, there
> is 1+2*N rpc call, N is hfile numbers, The first rpc call is to
> DistributedFileSystem#listStatus to get hfiles, for every hfile there is two
> rpc call DistributedFileSystem#getFileStatus(path) and then
> DistributedFileSystem#getFileBlockLocations(status, start, length).
> With the patch to computeHDFSBlocksDistribution for a region family, there is
> 2 rpc call, they are DistributedFileSystem#getFileStatus(path) and
> DistributedFileSystem#listLocatedStatus(final Path p, final PathFilter
> filter).
> So if there is at least one hfile, with the patch, the rpc call will less.
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