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https://issues.apache.org/jira/browse/HADOOP-8649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435110#comment-13435110
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Daryn Sharp commented on HADOOP-8649:
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I'm just generally concerned about the implications of stacking filesystems.
Ie. a {{FilterFileSystem}} over a {{ChRootedFileSystem}} over a
{{FilterFileSystem}}, etc. I'm not sure it's a problem, but you should make
sure there are tests that prove the stacking works.
I conceptually like the approach suggested. Throw something up and let's see
how it looks!
> ChecksumFileSystem should have an overriding implementation of
> listStatus(Path, PathFilter) for improved performance
> --------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-8649
> URL: https://issues.apache.org/jira/browse/HADOOP-8649
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 1.0.3, 2.0.0-alpha
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Attachments: branch1-HADOOP-8649.patch, branch1-HADOOP-8649.patch,
> HADOOP-8649_branch1.patch, HADOOP-8649_branch1.patch,
> HADOOP-8649_branch1.patch_v2, HADOOP-8649_branch1.patch_v3,
> TestChecksumFileSystemOnDFS.java, trunk-HADOOP-8649.patch,
> trunk-HADOOP-8649.patch
>
>
> Currently, ChecksumFileSystem implements only listStatus(Path).
> The other form of listStatus(Path, customFilter) results in parsing the list
> twice to apply each of the filters - custom and checksum filter.
> By using a composite filter instead, we limit the parsing to once.
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