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https://issues.apache.org/jira/browse/HDFS-3924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455020#comment-13455020
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Aaron T. Myers commented on HDFS-3924:
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Hey Andrew, this does indeed increase the size of the valid range of unique
volume identifiers by interpreting the bytes on the wire as ints instead of
bytes, but to make this identifier truly opaque, I think we should not
interpret the byte[] sent at all. Instead, HdfsVolumeId should store and
compare the values in the byte array directly.
> Multi-byte id in HdfsVolumeId
> -----------------------------
>
> Key: HDFS-3924
> URL: https://issues.apache.org/jira/browse/HDFS-3924
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Affects Versions: 2.0.3-alpha
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: hdfs-3924-1.patch
>
>
> Currently, the {{id}} in {{HdfsVolumeId}} is just a single byte. It'd be nice
> to make this larger, for situations where there's a large number of disks.
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