A few: https://issues.apache.org/jira/browse/CASSANDRA-4914
https://issues.apache.org/jira/browse/CASSANDRA-5184 https://issues.apache.org/jira/browse/CASSANDRA-6704 https://issues.apache.org/jira/browse/CASSANDRA-6167 On Thu, Feb 27, 2014 at 7:50 AM, David Semeria <da...@lmframework.com>wrote: > Hi List, > > I was wondering whether there have been any past proposals for > implementing node side processing (NSP) in C*. By NSP, I mean the passing a > reference to a Java class which would then process the result set before it > being returned to the client. > > In our particular use case our clients typically loop through result sets > of a million or more rows to produce a tiny amount of output (sums, means, > variance, etc). The bottleneck -- quite obviously -- is the need to > transfer a million rows to the client before processing can take place. It > would be extremely useful to execute this processing on the coordinator > node and only transfer the results to the client. > > I mention this here because I can imagine other C* users having similar > requirements. > > Thanks > > D. >
