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https://issues.apache.org/jira/browse/HDFS-5704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arpit Agarwal updated HDFS-5704:
--------------------------------
Description:
Currently every time a block a allocated, the entire list of blocks are written
in the editlog in OP_UPDATE_BLOCKS operation. This has n^2 growth issue. The
total size of editlog records for a file with large number of blocks could be
huge.
The goal of this jira is discuss adding a different editlog record that only
records allocation of block and not the entire block list, on every block
allocation.
> Change OP_UPDATE_BLOCKS with a new OP_ADD_BLOCK
> ------------------------------------------------
>
> Key: HDFS-5704
> URL: https://issues.apache.org/jira/browse/HDFS-5704
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
>
> Currently every time a block a allocated, the entire list of blocks are
> written in the editlog in OP_UPDATE_BLOCKS operation. This has n^2 growth
> issue. The total size of editlog records for a file with large number of
> blocks could be huge.
> The goal of this jira is discuss adding a different editlog record that only
> records allocation of block and not the entire block list, on every block
> allocation.
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