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https://issues.apache.org/jira/browse/HDFS-11939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156211#comment-16156211
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Hadoop QA commented on HDFS-11939:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s{color}
| {color:red} HDFS-11939 does not apply to HDFS-7240. Rebase required? Wrong
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-11939 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12872799/HDFS-11939-HDFS-7240.004.patch
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| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/21030/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> 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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