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Posted to hdfs-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2013/06/22 00:18:21 UTC
[jira] [Updated] (HDFS-4645) Move from randomly generated block ID
to sequentially generated block ID
[ https://issues.apache.org/jira/browse/HDFS-4645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arpit Agarwal updated HDFS-4645:
--------------------------------
Attachment: HDFS-4645.001.patch
SequentialblockIDallocation.pdf
Initial patch to get Jenkins results.
Updated patch with more tests to follow.
> 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
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: HDFS-4645.001.patch, SequentialblockIDallocation.pdf
>
>
> 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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