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From David Strauss <da...@fourkitchens.com>
Subject Re: Replicating data over the wan?
Date Wed, 31 Mar 2010 01:51:36 GMT
On 2010-03-31 01:42, Erik Holstad wrote:
> I'm not too worried about inconsistency in data too much more if things
> like the gossip protocol would saturate the wan and things like that.

I haven't tried inter-DC replication, but I would be surprised if gossip
saturated a line with any decent bandwidth.

> In that case is the replication to the other datacenter be treated as
> that node is down and you start replicating to a different note using hinted hand off?

Assuming you're using RF >= 2 and a RackAware strategy, there should be
a node to properly write to for any row in either DC without need for
hinted hand-off. Writes should then succeed if you use SL.ONE, even with
a disconnect between DCs.

-- 
David Strauss
   | david@fourkitchens.com
Four Kitchens
   | http://fourkitchens.com
   | +1 512 454 6659 [office]
   | +1 512 870 8453 [direct]


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