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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Some questions about the write operation and hinted handoff
Date Fri, 09 Jul 2010 04:45:20 GMT
On Thu, Jul 8, 2010 at 10:45 PM, ChingShen <chingshenchen@gmail.com> wrote:
> Ok, If so, I suppose that A sends requests to B, C and D nodes(RF=3) at
> CL.QUORUM, but D is down, then return success message to the client, and A
> write a hint to E node? until D comes back up then E forwards the data to D?

If it knows that D is down before it starts, then it will tag the
write to B or C with a "replay this row to D" hint.  Otherwise, it
will attempt to write to D, which will fail.  Either way a QUORUM
write would succeed.

-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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