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https://issues.apache.org/jira/browse/HDFS-16978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17711713#comment-17711713
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Ayush Saxena commented on HDFS-16978:
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{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.
{quote}
Yahh, you use it if you push for it. If there are multiple entries shoot for
putAll() else life goes as is....
{quote}I had to migrate mount points from zk to hdfs
{quote}
hmm, yep, I too was guessing some initial setup or migration stuff could be a
use case, was curious if some user level application or service is attempting
that frequently during prod loads...
> 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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