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https://issues.apache.org/jira/browse/HDFS-4465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-4465:
---------------------------------
Attachment: HDFS-4465.patch
Here's a more polished patch which implements the changes I previously
described. The patch is a bit smaller than the previous one because some of the
refactoring of LightWeightGSet was already done in other unrelated JIRAs, but
the approach is still the same.
> Optimize datanode ReplicasMap and ReplicaInfo
> ---------------------------------------------
>
> Key: HDFS-4465
> URL: https://issues.apache.org/jira/browse/HDFS-4465
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: dn-memory-improvements.patch, HDFS-4465.patch
>
>
> In Hadoop a lot of optimization has been done in namenode data structures to
> be memory efficient. Similar optimizations are necessary for Datanode
> process. With the growth in storage per datanode and number of blocks hosted
> on datanode, this jira intends to optimize long lived ReplicasMap and
> ReplicaInfo objects.
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