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https://issues.apache.org/jira/browse/HDFS-16978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17711710#comment-17711710
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Viraj Jasani commented on HDFS-16978:
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Reg the usecase, I had to migrate mount points from zk to hdfs (due to zk being
hotspot for multiple usecases and adding router is just additional load) and
during that time, I realized that we have no way to bulk add all mount points
in one shot, hence I thought of adding this improvement.
{quote}anyway, should be adjusted in an existing commands like router -add
<MountEntry1> ; <MountEntry2> and like -update <MountEntry1>, <MountEntry2> and
so on
{quote}
That still adds each point separately right? We are still not adding/updating
mount points in one shot. It's all about using putAll() at state store level
impl.
If you are not fine with me pursuing this, please let me know and I will not
create PR.
> RBF: New Router admin command to support bulk add of mount points
> -----------------------------------------------------------------
>
> Key: HDFS-16978
> URL: https://issues.apache.org/jira/browse/HDFS-16978
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Minor
>
> All state store implementations support adding multiple state store records
> using single putAll() implementation. We should provide new router admin API
> to support bulk addition of mount table entries that can utilize this build
> add implementation at state store level.
> For more than one mount point to be added, the goal of bulk addition should be
> # To reduce frequent router calls
> # To avoid frequent state store cache refreshers with each single mount
> point addition
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