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https://issues.apache.org/jira/browse/HDFS-16283?focusedWorklogId=788285&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-788285
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ASF GitHub Bot logged work on HDFS-16283:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 06/Jul/22 14:44
Start Date: 06/Jul/22 14:44
Worklog Time Spent: 10m
Work Description: ayushtkn commented on PR #4524:
URL: https://github.com/apache/hadoop/pull/4524#issuecomment-1176312209
@Hexiaoqiao I am ok with using path, but if I catch correct, the only save
with using path will be like we won't be exposing the namespaces to the end
client? but in exchange we will be saving I think a bunch of RPCs, especially
in case of multi destination mount points.
May be from the performance point of view, it might be better with
namespaces( the present approach). But I don't have any strong objections, if
you feel we shouldn't expose the namespaces to end client.
if there is a particular use case where we shouldn't expose namespace to end
client, in that case we may hide this change behind a config, and this
optimisation won't work in that case, but in general ViewFs also knows about
all namespaces and usually a lot of clients too have these namespaces defined
in their configs. so, that is not a big secret, and this namespace info will
also be their in back-end and I even don't think exposing them via this route
can have any security issue?
But I am Ok, with whichever approach you folks feel better..
Issue Time Tracking
-------------------
Worklog Id: (was: 788285)
Time Spent: 5h 10m (was: 5h)
> RBF: improve renewLease() to call only a specific NameNode rather than make
> fan-out calls
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-16283
> URL: https://issues.apache.org/jira/browse/HDFS-16283
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: rbf
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Priority: Major
> Labels: pull-request-available
> Attachments: RBF_ improve renewLease() to call only a specific
> NameNode rather than make fan-out calls.pdf
>
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> Currently renewLease() against a router will make fan-out to all the
> NameNodes. Since renewLease() call is so frequent and if one of the NameNodes
> are slow, then eventually the router queues are blocked by all renewLease()
> and cause router degradation.
> We will make a change in the client side to keep track of NameNode Id in
> additional to current fileId so routers understand which NameNodes the client
> is renewing lease against.
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