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https://issues.apache.org/jira/browse/HDFS-9260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Staffan Friberg updated HDFS-9260:
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Attachment: HDFS-7435.005.patch
Fix the last todos
Handles New NN and Old DN (unsorted entries), it is ineffiecient since the NN
needs to sort entries. However it should only be a problem during the upgrade
cycle, and avoidable if DNs are updated first.
StorageInfoMonitor thread that can compact the TreeSet if the fill ratio gets
too low.
Added test to check that unsorted entries are handled correctly.
> Improve performance and GC friendliness of startup and FBRs
> -----------------------------------------------------------
>
> Key: HDFS-9260
> URL: https://issues.apache.org/jira/browse/HDFS-9260
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, namenode, performance
> Affects Versions: 2.7.1
> Reporter: Staffan Friberg
> Assignee: Staffan Friberg
> Attachments: HDFS Block and Replica Management 20151013.pdf,
> HDFS-7435.001.patch, HDFS-7435.002.patch, HDFS-7435.003.patch,
> HDFS-7435.004.patch, HDFS-7435.005.patch
>
>
> This patch changes the datastructures used for BlockInfos and Replicas to
> keep them sorted. This allows faster and more GC friendly handling of full
> block reports.
> Would like to hear peoples feedback on this change and also some help
> investigating/understanding a few outstanding issues if we are interested in
> moving forward with this.
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