I found this:
Doesn't seem to have attracted much interest.
From: Suresh Srinivas [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 02, 2013 1:03 PM
To: [EMAIL PROTECTED]
Subject: Re: HDFS file section rewrite
HDFS only supports regular writes and append. Random write is not supported. I do not know of any feature/jira that is underway to support this feature.
On Tue, Jul 2, 2013 at 9:01 AM, John Lilley <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>> wrote:
I'm sure this has been asked a zillion times, so please just point me to the JIRA comments: is there a feature underway to allow for re-writing of HDFS file sections?