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https://issues.apache.org/jira/browse/HDFS-11939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anu Engineer updated HDFS-11939:
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Status: In Progress (was: Patch Available)
Setting this to in progress, so that we can rebase and bring this back when we
have committed the size less key writes.
> Ozone : add read/write random access to Chunks of a key
> -------------------------------------------------------
>
> Key: HDFS-11939
> URL: https://issues.apache.org/jira/browse/HDFS-11939
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Reporter: Chen Liang
> Assignee: Chen Liang
> Labels: OzonePostMerge
> Attachments: HDFS-11939-HDFS-7240.001.patch,
> HDFS-11939-HDFS-7240.002.patch, HDFS-11939-HDFS-7240.003.patch,
> HDFS-11939-HDFS-7240.004.patch
>
>
> In Ozone, the value of a key is a sequence of container chunks. Currently,
> the only way to read/write the chunks is by using ChunkInputStream and
> ChunkOutputStream. However, by the nature of streams, these classes are
> currently implemented to only allow sequential read/write.
> Ideally we would like to support random access of the chunks. For example, we
> want to be able to seek to a specific offset and read/write some data. This
> will be critical for key range read/write feature, and potentially important
> for supporting parallel read/write.
> This JIRA tracks adding support by implementing FileChannel class on top
> Chunks.
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