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Posted to hdfs-issues@hadoop.apache.org by "Chen Liang (JIRA)" <ji...@apache.org> on 2018/08/28 21:13:00 UTC

[jira] [Created] (HDFS-13880) Add mechanism to allow certain RPC calls to bypass sync

Chen Liang created HDFS-13880:
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             Summary: Add mechanism to allow certain RPC calls to bypass sync
                 Key: HDFS-13880
                 URL: https://issues.apache.org/jira/browse/HDFS-13880
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Chen Liang
            Assignee: Chen Liang


Currently, every single call to NameNode will be synced, in the sense that NameNode will not process it until state id catches up. But in certain cases, we would like to bypass this check and allow the call to return immediately, even when the server id is not up to date. One case could be the to-be-added new API in HDFS-13749 that request for current state id. Others may include calls that do not promise real time responses such as {{getContentSummary}}. This Jira is to add the mechanism to allow certain calls to bypass sync.



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