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From Rob Coli <rc...@digg.com>
Subject Re: Is ReplicationFactor (eventually) guaranteed?
Date Sat, 27 Mar 2010 01:12:26 GMT
On 3/26/10 5:57 PM, Jianing Hu wrote:
> In a cluster with ReplicationFactor>  1, if one server goes down, will
> new replicas be created on other servers to satisfy the set
> ReplicationFactor?

Yes, via Anti-Entropy.

http://wiki.apache.org/cassandra/AntiEntropy
http://wiki.apache.org/cassandra/ArchitectureAntiEntropy

It's worth noting that "hot" keys are likely to be re-replicated by Read 
Repair before Anti Entropy is triggered.

http://wiki.apache.org/cassandra/ReadRepair

=Rob




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