[jira] [Commented] (HDFS-6634) inotify in HDFS

["Benoit Perroud (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-6634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390537#comment-14390537 ] 

Benoit Perroud commented on HDFS-6634:
--------------------------------------

[~cmccabe] you probably meant {{EventList}}. But this class is not available outside of {{DFSInotifyEventInputStream}}, i.e. {{poll}} and {{take}} both return {{Event}} which does not contains the txid.
I understand CONCAT_DELETE for instance can have multiple {{Event}}s with the same txId, but from my perspective the txId should be embedded in the {{Event}}. There's no easy way to compute it otherwise apart from incrementing a counter.

> inotify in HDFS
> ---------------
>
>                 Key: HDFS-6634
>                 URL: https://issues.apache.org/jira/browse/HDFS-6634
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs-client, namenode, qjm
>            Reporter: James Thomas
>            Assignee: James Thomas
>             Fix For: 2.6.0
>
>         Attachments: HDFS-6634.2.patch, HDFS-6634.3.patch, HDFS-6634.4.patch, HDFS-6634.5.patch, HDFS-6634.6.patch, HDFS-6634.7.patch, HDFS-6634.8.patch, HDFS-6634.9.patch, HDFS-6634.patch, inotify-design.2.pdf, inotify-design.3.pdf, inotify-design.4.pdf, inotify-design.pdf, inotify-intro.2.pdf, inotify-intro.pdf
>
>
> Design a mechanism for applications like search engines to access the HDFS edit stream.



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