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Posted to hdfs-dev@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2013/10/17 01:21:42 UTC
[jira] [Created] (HDFS-5378) In CacheReport, don't send genstamp
and length on the wire
Colin Patrick McCabe created HDFS-5378:
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Summary: In CacheReport, don't send genstamp and length on the wire
Key: HDFS-5378
URL: https://issues.apache.org/jira/browse/HDFS-5378
Project: Hadoop HDFS
Issue Type: Sub-task
Components: datanode
Affects Versions: HDFS-4949
Reporter: Colin Patrick McCabe
Assignee: Colin Patrick McCabe
As discussed in HDFS-5096, we don't need genstamp and block length when processing cache reports. So let's not send them over the wire (it increases the size of cache reports by 3x).
Also, we should report the caching statistics alongside the normal DN stats in {{StorageReport}}. There's no reason for them to be separate. Since the new fields will be optional and default to 0, there will be no extra overhead in the non-caching case.
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