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From aaron morton <aa...@thelastpickle.com>
Subject Re: Force a node to form part of quorum
Date Thu, 16 Jun 2011 10:57:15 GMT
Short answer:  No. 

Medium answer: No all nodes are equal. It could create a single point of failure if a QUOURM
could not be formed without a specific node. 

Writes are sent to every replica. Reads with Read Repair enabled are also sent to every replica.
For reads the "closest" UP node as determined by the snitch and possibly re-ordered by the
Dynamic Snitch  is asked to return the actual data. This replica must respond for the request
to complete. 

If it's a question about maximising cache hits see https://github.com/apache/cassandra/blob/cassandra-0.8.0/conf/cassandra.yaml#L308

Cheers
   
-----------------
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com

On 16 Jun 2011, at 05:58, A J wrote:

> Is there a way to favor a node to always participate (or never
> participate) towards fulfillment of read consistency as well as write
> consistency ?
> 
> Thanks
> AJ


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