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From Blair Zajac <bl...@orcaware.com>
Subject Re: Logging Cassandra Reads/Writes
Date Tue, 09 Jul 2013 19:30:44 GMT
On 07/09/2013 12:25 PM, hajjat wrote:
> Hi,
>
> In a quorum read, my understanding is that Cassandra gets a digest of the
> object to be read from all nodes, and then chooses the fastest node for
> retrieving the data (if the quorum is met).

According to this talk at Cassandra summit, that's incorrect.

http://www.youtube.com/watch?v=VRZk-NhfX18

It gets the real data from one node and digests from others and if 
there's a mismatch, then it gets the data from the others and repairs them.

Blair


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