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https://issues.apache.org/jira/browse/HDFS-4645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhengchenyu reassigned HDFS-4645:
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Assignee: zhengchenyu (was: Arpit Agarwal)
> Move from randomly generated block ID to sequentially generated block ID
> ------------------------------------------------------------------------
>
> Key: HDFS-4645
> URL: https://issues.apache.org/jira/browse/HDFS-4645
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.0.0-alpha1
> Reporter: Suresh Srinivas
> Assignee: zhengchenyu
> Priority: Major
> Fix For: 2.1.0-beta
>
> Attachments: HDFS-4645.001.patch, HDFS-4645.002.patch,
> HDFS-4645.003.patch, HDFS-4645.004.patch, HDFS-4645.005.patch,
> HDFS-4645.006.patch, HDFS-4645.branch-2.patch,
> SequentialblockIDallocation.pdf, editsStored
>
>
> Currently block IDs are randomly generated. This means there is no pattern to
> block ID generation and no guarantees such as uniqueness of block ID for the
> life time of the system can be made. I propose using SequentialNumber for
> block ID generation.
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