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Posted to hdfs-issues@hadoop.apache.org by "Chen Liang (JIRA)" <ji...@apache.org> on 2018/10/05 17:46:00 UTC
[jira] [Updated] (HDFS-13880) Add mechanism to allow certain RPC
calls to bypass sync
[ https://issues.apache.org/jira/browse/HDFS-13880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chen Liang updated HDFS-13880:
------------------------------
Fix Version/s: HDFS-12943
> 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
> Priority: Major
> Fix For: HDFS-12943
>
> Attachments: HDFS-13880-HDFS-12943.001.patch, HDFS-13880-HDFS-12943.002.patch, HDFS-13880-HDFS-12943.003.patch, HDFS-13880-HDFS-12943.004.patch, HDFS-13880-HDFS-12943.005.patch
>
>
> 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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