On Fri, Jul 9, 2010 at 4:32 AM, Jonathan Ellis <jbellis@gmail.com> wrote:
> If the coordinator knows it can't achieve the requested CL it won't do
> any writes, hinted or otherwise, and will immediately report
> UnavailableException to the client.

> To summarize: hinted writes are only generated when Cassandra (a)
> knows a target is down ahead of time and (b) still has enough UP
> targets to satisfy the requested CL.

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?

Thanks.

Shen