You are viewing a plain text version of this content. The canonical link for it is here.
Posted to hdfs-issues@hadoop.apache.org by "Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org> on 2019/02/27 23:34:00 UTC
[jira] [Commented] (HDDS-372) There are three buffer copies in
BlockOutputStream
[ https://issues.apache.org/jira/browse/HDDS-372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16779903#comment-16779903 ]
Tsz Wo Nicholas Sze commented on HDDS-372:
------------------------------------------
[~shashikant], it is great that you have picked this up. Thanks.
> There are three buffer copies in BlockOutputStream
> --------------------------------------------------
>
> Key: HDDS-372
> URL: https://issues.apache.org/jira/browse/HDDS-372
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Client
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Shashikant Banerjee
> Priority: Major
> Attachments: HDDS-372.20180829.patch
>
>
> Currently, there are three buffer copies in ChunkOutputStream
> # from byte[] to ByteBuffer, and
> # from ByteBuffer to ByteString.
> # from ByteString to ByteBuffer for checskum computation
> We should eliminate the ByteBuffer in the middle.
> For zero copy io, we should support WritableByteChannel instead of OutputStream. It won't be done in this JIRA.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org