om: Dhruba Borthakur
To: common-dev@hadoop.apache.org
Date: Mon, 2 Nov 2009 22:31:03 -0800
Subject: Re: datanode ack behavior for block receive
Hi Bin,
I think that your observation is correct. The act of sending a SUCCESS
status ack can be avoided by intelligently looking at the seqno. However, my
Hi Bin,
I think that your observation is correct. The act of sending a SUCCESS
status ack can be avoided by intelligently looking at the seqno. However, my
opinion is that returning the extra bit of information is not impacting
performance/correctness at all, do you agree?
thank,
dhruba
On Mo
Hi All,
I observed that there are two kinds of ack'ing going on when a
datanode receives a data block packet: 1. ack by sending the sequence
number of the received block to upstream datanode; 2. also send
operation status (e.g. SUCCESS, ERROR);
The seqno is chained, that is, a node will not a
