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https://issues.apache.org/jira/browse/HDFS-17875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18053170#comment-18053170
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ASF GitHub Bot commented on HDFS-17875:
---------------------------------------
ivandika3 opened a new pull request, #8197:
URL: https://github.com/apache/hadoop/pull/8197
### Description of PR
We found that AtomicFileOutputStream write is slow because the `write(byte
b[], int off, int len)` uses FilterOutputStream implementation which calls
write(byte b) for each byte.
We should override this API and forward it to the underlying OutputStream
instead.
### How was this patch tested?
Existing CI
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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> AtomicFileOutputStream should override FilterOutputStream batch write API
> -------------------------------------------------------------------------
>
> Key: HDFS-17875
> URL: https://issues.apache.org/jira/browse/HDFS-17875
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ivan Andika
> Priority: Major
>
> [~XiChen] found that AtomicFileOutputStream write is slow because the
> `write(byte b[], int off, int len)` uses FilterOutputStream implementation
> which calls write(byte b) for each byte.
>
> We should override this API and forward it to the underlying OutputStream
> instead.
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