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From "Dinesh S. Atreya (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9607) Advance Hadoop Architecture (AHA) - HDFS Update (write-in-place)
Date Sun, 14 Feb 2016 15:47:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15146619#comment-15146619
] 

Dinesh S. Atreya commented on HDFS-9607:
----------------------------------------

What I meant to say is that users can exercise the liberty to copy a portion of the array
and fill it with *_spaces_* for example; if users want to update/replace  
{noformat}
"Hello HDFS"
{noformat}
with 
{noformat}
"Hi HDFS"
{noformat}
they can do so using {{fill}} and {{copyOf}} methods from https://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html.

> Advance Hadoop Architecture (AHA) - HDFS Update (write-in-place)
> ----------------------------------------------------------------
>
>                 Key: HDFS-9607
>                 URL: https://issues.apache.org/jira/browse/HDFS-9607
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Dinesh S. Atreya
>
> Link to Umbrella JIRA
> https://issues.apache.org/jira/browse/HADOOP-12620 
> Provide capability to carry out in-place writes/updates. Only writes in-place are supported
where the existing length does not change.
> For example, "Hello World" can be replaced by "Hello HDFS!"
> See https://issues.apache.org/jira/browse/HADOOP-12620?focusedCommentId=15046300&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15046300
for more details.
> Currently following are supported.
> # Sequential writes
> # Append (HADOOP-1700, HDFS-265)
> # Snapshots (HDFS-2802)
> # Truncate (HDFS-3107)
> This JIRA is for random updates (write-in-place).



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