[HDFS-8760] Erasure Coding: reuse BlockReader when reading the same block in pread - ASF JIRA

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Type: Sub-task
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: HDFS-7285
Component/s: None
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Description

Currently in pread, we create a new block reader for each aligned stripe even though these stripes belong to the same block. It's better to reuse them to avoid unnecessary block reader creation overhead. This can also avoid reading from the same bad DataNode.

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HDFS-8760-HDFS-7285.001.patch
20/Jul/15 19:03
36 kB
Jing Zhao
HDFS-8760.000.patch
16/Jul/15 01:12
30 kB
Jing Zhao

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Assignee:: Jing Zhao

Reporter:: Jing Zhao

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Dates

Created:: 10/Jul/15 23:55

Updated:: 30/Sep/15 19:38

Resolved:: 21/Jul/15 22:48