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https://issues.apache.org/jira/browse/HDFS-7661?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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GAO Rui updated HDFS-7661:
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Attachment: HDFS-7661-unitTest-wip-trunk.patch
Hi [~szetszwo], I have witten a unitTest to illustrate the goal of hflush() for
Erasure Coding file. Could you review it and see if it make sense to you when
you got some time. In the unit test code, I write some of my concerns in the
code comment. Currently, I think EC file hflush() is similar to replica file
hflush(), only we need to flush all the data in {{FSOutputSummer#buf}} into the
{{dataQueue}} of nine(in R-S-6-3) {{StripedDataStreamer}} instead of one
{{DataStreamer}}, and wait for the ack.
On the other hand, in the case of the user/client write again into the Output
Stream, we just over write the last block group to the new length. Dose this
make sense?
> Support read when a EC file is being written
> --------------------------------------------
>
> Key: HDFS-7661
> URL: https://issues.apache.org/jira/browse/HDFS-7661
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Tsz Wo Nicholas Sze
> Assignee: GAO Rui
> Attachments: HDFS-7661-unitTest-wip-trunk.patch
>
>
> We also need to support hflush/hsync and visible length.
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