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https://issues.apache.org/jira/browse/HDFS-13346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16416762#comment-16416762
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Yiqun Lin commented on HDFS-13346:
----------------------------------
Thanks [~elgoiri] for sharing the comments.
{quote}
You would have the same issue if A sets it to 200 and B later sets it to 300.
You have two admins doing conflicting operations.
{quote}
Agreed. Actually these should be the conflicting operations. Even though one
admin set quota successfully, but after this the other admin do the new
updating. The previous admin will see the false quota value. So I mean
following way should be still okay:
{code}
One better way is that we invoke update operation this.rpcServer.setQuota in
RouterAdminServer, not in RouterQuotaUpdateService.
{code}
[~liuhongtong], I think you can go ahead by this way, :).
> RBF: Fix synchronization of router quota and ns quota
> -----------------------------------------------------
>
> Key: HDFS-13346
> URL: https://issues.apache.org/jira/browse/HDFS-13346
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: liuhongtong
> Assignee: liuhongtong
> Priority: Major
> Attachments: HDFS-13346.001.patch, HDFS-13346.002.patch
>
>
> Check Router Quota and ns Quota:
> {code}
> $ hdfs dfsrouteradmin -ls /ns10t
> Mount Table Entries:
> Source Destinations Owner
> Group Mode Quota/Usage
> /ns10t ns10->/ns10t hadp
> hadp rwxr-xr-x [NsQuota: 150/319,
> SsQuota: -/-]
> /ns10t/ns1mountpoint ns1->/a/tt hadp
> hadp rwxr-xr-x [NsQuota: -/-, SsQuota:
> -/-]
> $ hdfs dfs -count -q hdfs://ns10/ns10t
> 150 -155 none inf 3
> 302 0 hdfs://ns10/ns10t
> {code}
> Update Router Quota:
> {code:java}
> $ hdfs dfsrouteradmin -setQuota /ns10t -nsQuota 400
> Successfully set quota for mount point /ns10t
> {code}
> Check Router Quota and ns Quota:
> {code:java}
> $ hdfs dfsrouteradmin -ls /ns10t
> Mount Table Entries:
> Source Destinations Owner
> Group Mode Quota/Usage
> /ns10t ns10->/ns10t hadp
> hadp rwxr-xr-x [NsQuota: 400/319,
> SsQuota: -/-]
> /ns10t/ns1mountpoint ns1->/a/tt hadp
> hadp rwxr-xr-x [NsQuota: -/-, SsQuota:
> -/-]
> $ hdfs dfs -count -q hdfs://ns10/ns10t
> 150 -155 none inf 3
> 302 0 hdfs://ns10/ns10t
> {code}
> Now Router Quota has updated successfully, but ns Quota not.
>
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