[
https://issues.apache.org/jira/browse/HDFS-12964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16312795#comment-16312795
]
Yang Yun commented on HDFS-12964:
---------------------------------
Yes, it's similar function with FsShel '-tail -f'.
The difference is, this is input stream API, can be used for programming, it
doesn't request Namenode every time and keep a cache for the connection to
Datanode.
> Read a opened file timely and effectively when it's being written by other
> --------------------------------------------------------------------------
>
> Key: HDFS-12964
> URL: https://issues.apache.org/jira/browse/HDFS-12964
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Reporter: Yang Yun
> Priority: Minor
> Attachments: HADOOP-12964.001.patch
>
>
> One thread opens a HDFS file and keeps writing. Another thread opens same
> file and keeps reading it at the same time, also want to get the newest
> content of file. that happens in many environments, for example, in some
> message transmission applications. And it also requires the new content can
> be read timely and effectively, for there maybe many tasks are working in
> same time.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
