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From Harsh J <ha...@cloudera.com>
Subject Re: datanode write forwarding
Date Tue, 18 Dec 2012 22:13:38 GMT
Hi,

The received write packet is directly socket-written to the next
node's receiver (async process - we don't wait for it to hit the disk
there), and then written onto the disk of self().

You may see HDFS classes BlockReceiver and PacketReceiver in trunk for
more information.

On Wed, Dec 19, 2012 at 2:26 AM, Jay Vyas <jayunit100@gmail.com> wrote:
> Hi :
>
> Do data nodes, when they receive write requests, forward the request to the
> next datanode in the chain after appending to a file? Or rather, do the
> write and forward asynchronously and at the same time?
>
> --
> Jay Vyas
> http://jayunit100.blogspot.com



-- 
Harsh J

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