On 2010-04-05 07:47, Paul Prescod wrote: > On Mon, Apr 5, 2010 at 12:01 AM, David Strauss <da...@fourkitchens.com> wrote: >> On 2010-04-05 03:42, Paul Prescod wrote: >> ... >> >> There is a difference between Cassandra allowing inc/dec on values and >> actually *knowing* the resultant value at the time of the write. It's >> likely that inc/dec support will still feature blind writes if at all >> possible. The memcached protocol returns a resultant value from inc/dec. > > Right. That's why I said that the proxy layer would need to read the > result with an appropriate consistency level before returning to the > memcached client application. The client application would need to > declare its consistency preference using a configuration file.
But your "write then read" model lacks the atomicity of the memcached API. It's possible for two clients to read the same value. -- David Strauss | da...@fourkitchens.com Four Kitchens | http://fourkitchens.com | +1 512 454 6659 [office] | +1 512 870 8453 [direct]
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