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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14612) Reduce memory copy in BlobOutputStreamInternal::dispatchWrite
Date Tue, 19 Dec 2017 16:49:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated HADOOP-14612:
------------------------------------
    Parent Issue: HADOOP-15132  (was: HADOOP-14552)

> Reduce memory copy in BlobOutputStreamInternal::dispatchWrite
> -------------------------------------------------------------
>
>                 Key: HADOOP-14612
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14612
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/azure
>            Reporter: Rajesh Balamohan
>            Priority: Minor
>
> Currently in {{BlobOutputStreamInternal::dispatchWrite}}, buffer is copied internally
for every write. During large uploads this can be around 4 MB. This can be avoided if there
is internal class which extends ByteArrayOutputStream with additional method "ByteArrayInputStream
getInputStream()".



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