As per my understanding it's sequential. Let's wait for some experts comments.

Best Regards,
Tariq
+91-9741563634



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?