You are viewing a plain text version of this content. The canonical link for it is here.
Posted to hdfs-issues@hadoop.apache.org by "Hanisha Koneru (JIRA)" <ji...@apache.org> on 2019/03/01 08:33:00 UTC
[jira] [Updated] (HDDS-1175) Serve read requests directly from
RocksDB
[ https://issues.apache.org/jira/browse/HDDS-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hanisha Koneru updated HDDS-1175:
---------------------------------
Attachment: HDDS-1175.001.patch
> Serve read requests directly from RocksDB
> -----------------------------------------
>
> Key: HDDS-1175
> URL: https://issues.apache.org/jira/browse/HDDS-1175
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Attachments: HDDS-1175.001.patch
>
>
> We can directly server read requests from the OM's RocksDB instead of going through the Ratis server. OM should first check its role and only if it is the leader can it server read requests.
> There can be a scenario where an OM can lose its Leader status but not know about the new election in the ring. This OM could server stale reads for the duration of the heartbeat timeout but this should be acceptable (similar to how Standby Namenode could possibly server stale reads till it figures out the new status).
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org