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https://issues.apache.org/jira/browse/HBASE-24055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17076018#comment-17076018
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Duo Zhang commented on HBASE-24055:
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For WAL we need the output stream to support hflush/hsync. But by default, when
you create a file under a EC directory, the output stream will not support
hflush/hsync, as it will buffer the output locally and once we have a big
enough chunk we will calculate the EC and write them to datanodes.
So HDFS introduces a CreateFlag called SHOULD_REPLICATE, if it is specified, no
matter whether the target directory is EC or not, the file will always be a
normal file without EC support, which means it can support hflush/hsync.
> Make AsyncFSWAL can run on EC cluster
> -------------------------------------
>
> Key: HBASE-24055
> URL: https://issues.apache.org/jira/browse/HBASE-24055
> Project: HBase
> Issue Type: Improvement
> Components: wal
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
>
> We need to enable replicate when creating the file.
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