[
https://issues.apache.org/jira/browse/HADOOP-3307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12592678#action_12592678
]
Mahadev konar commented on HADOOP-3307:
---------------------------------------
>am also curious about the 'parallel creation' aspect (since that seems to be
>the main argument for using a new > achive format). how do we populate a
>single hdfs file (backing the archive) in parallel?
The archive isnt a single file backed by an index but multiple files
quoting from the design posted earlier in the comments:
The format of an archive as a filesystem path is:
/user/mahadev/foo.har/_index*
/user/mahadev/foo.har/part-*
The indexes store the filenames and the offset with the part files.
Each map would create part-$i files and a single reduce or multiple reduces
could create the index files in the archive directory. Does that help in
understanding the design?
> Archives in Hadoop.
> -------------------
>
> Key: HADOOP-3307
> URL: https://issues.apache.org/jira/browse/HADOOP-3307
> Project: Hadoop Core
> Issue Type: New Feature
> Components: fs
> Reporter: Mahadev konar
> Assignee: Mahadev konar
> Fix For: 0.18.0
>
>
> This is a new feature for archiving and unarchiving files in HDFS.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
