[
https://issues.apache.org/jira/browse/HDFS-15119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026774#comment-17026774
]
Ahmed Hussein commented on HDFS-15119:
--------------------------------------
Thanks [~ayushtkn]. I agree with you.
I will try to benchmark the tradeoff between the two options and follow up with
another patch if I see significant performance improvement.
[~kihwal], Thanks for committing the patch to trunk. I have uploaded patch for
branch-2.10.
> Allow expiration of cached locations in DFSInputStream
> ------------------------------------------------------
>
> Key: HDFS-15119
> URL: https://issues.apache.org/jira/browse/HDFS-15119
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: dfsclient
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Minor
> Fix For: 3.3.0, 3.1.4, 3.2.2
>
> Attachments: HDFS-15119-branch-2.10.003.patch, HDFS-15119.001.patch,
> HDFS-15119.002.patch, HDFS-15119.003.patch
>
>
> Staleness and other transient conditions can affect reads for a long time
> since the block locations may not be re-fetched. It makes sense to make
> cached locations to expire.
> For example, we may not take advantage of local-reads since the nodes are
> blacklisted and have not been updated.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
