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https://issues.apache.org/jira/browse/HDFS-9607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114633#comment-15114633
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Dinesh S. Atreya commented on HDFS-9607:
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Since Java 8 https://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html
offers the following method,
{noformat} static byte[] copyOfRange(byte[] original, int from, int to)
// Copies the specified range of the specified array into a new array.
{noformat}
we can use a simpler write signature corresponding to the read signature.
{noformat} FSDataInputStream.read(long position, byte[] buffer, int offset, int
length) {noformat}
with the assumption that the caller will only supply the exact byte array that
needs to be written without {{offset}} and {{length}}.
> 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.
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