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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2017/11/01 10:20:00 UTC
[jira] [Commented] (HADOOP-15000) s3a new getdefaultblocksize be
called in getFileStatus which has not been implemented in s3afilesystem yet
[ https://issues.apache.org/jira/browse/HADOOP-15000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16233888#comment-16233888 ]
Steve Loughran commented on HADOOP-15000:
-----------------------------------------
Its deprecated more at the caller level, than the implementor. We, FS implementors, always have to implement it.
Why don't we want callers to use it? Because with aggregate filesystems (viewfs) the blocksize may vary depending on which bit of the path you are looking at. Same for different storage layers, where SSD may have a different policy from HDD.
> s3a new getdefaultblocksize be called in getFileStatus which has not been implemented in s3afilesystem yet
> ----------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-15000
> URL: https://issues.apache.org/jira/browse/HADOOP-15000
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Affects Versions: 2.9.0
> Reporter: Yonger
> Priority: Minor
>
> new implementation of getting block size has been called in getFileStatus method:
> {code:java}
> return new S3AFileStatus(meta.getContentLength(),
> dateToLong(meta.getLastModified()),
> path,
> getDefaultBlockSize(path),
> username);
> }
> {code}
> while we don't implement it in our s3afilesystem currently, also we need to implement this new method as the old one deprecated.
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