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https://issues.apache.org/jira/browse/HDDS-284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16701249#comment-16701249
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Hanisha Koneru commented on HDDS-284:
-------------------------------------
Thanks [~shashikant]. I will wait till tomorrow to commit patch v06.
> CRC for ChunksData
> ------------------
>
> Key: HDDS-284
> URL: https://issues.apache.org/jira/browse/HDDS-284
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Bharat Viswanadham
> Assignee: Hanisha Koneru
> Priority: Major
> Attachments: CRC and Error Detection for Containers.pdf,
> HDDS-284.00.patch, HDDS-284.005.patch, HDDS-284.006.patch, HDDS-284.01.patch,
> HDDS-284.02.patch, HDDS-284.03.patch, HDDS-284.04.patch, Interleaving CRC and
> Error Detection for Containers.pdf
>
>
> This Jira is to add CRC for chunks data.
> Right now a Chunk Info structure looks like this:
> _message ChunkInfo {_
> _required string chunkName =_ _1__;_
> _required uint64 offset =_ _2__;_
> _required uint64 len =_ _3__;_
> _optional string checksum =_ _4__;_
> _repeated KeyValue metadata =_ _5__;_
> _}_
>
> Proposal is to change ChunkInfo structure as below:
> _message ChunkInfo {_
> _required string chunkName = 1 ;_
> _required uint64 offset = 2 ;_
> _required uint64 len = 3 ;_
> _repeated KeyValue metadata = 4;_
> _required ChecksumData checksumData = 5;_
> _}_
>
> The ChecksumData structure would be as follows:
> _message ChecksumData {_
> _required ChecksumType type = 1;_
> _required uint32 bytesPerChecksum = 2;_
> _repeated bytes checksums = 3;_
> _}_
>
> Instead of changing disk format, we put the checksum into chunkInfo.
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