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Posted to common-dev@hadoop.apache.org by "Raghu Angadi (JIRA)" <ji...@apache.org> on 2008/01/29 23:20:33 UTC
[jira] Commented: (HADOOP-2154) Non-interleaved checksums would
optimize block transfers.
[ https://issues.apache.org/jira/browse/HADOOP-2154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12563695#action_12563695 ]
Raghu Angadi commented on HADOOP-2154:
--------------------------------------
Rajgopal, I am planning to implement this. Let me know if you have already made progress. My approach to to have multiple "checksum chunks" in each DATA_CHUNK as discussed in multiple comments above.
> Non-interleaved checksums would optimize block transfers.
> ---------------------------------------------------------
>
> Key: HADOOP-2154
> URL: https://issues.apache.org/jira/browse/HADOOP-2154
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.14.0
> Reporter: Konstantin Shvachko
> Assignee: Rajagopal Natarajan
>
> Currently when a block is transfered to a data-node the client interleaves data chunks with the respective checksums.
> This requires creating an extra copy of the original data in a new buffer interleaved with the crcs.
> We can avoid extra copying if the data and the crc are fed to the socket one after another.
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