No we aren't caching 100%, we cache over 20 - 30 million which only starts to get a high hit rate overtime so to have a useful cache can take over a week of running.  We would love to store the complete CF in memory but know know of a server that can hold that much data in memory while still being commodity.  Our data set is currently over 100GB.

On Fri, Aug 6, 2010 at 5:54 PM, Jonathan Ellis <> wrote:
are you caching 100% of the CF?

if not this is not super useful.

On Fri, Aug 6, 2010 at 7:10 PM, Artie Copeland <> wrote:
> would it be possible to backport the 0.7 feature, the ability to safe and
> preload row caches after a restart.  i think that is a very nice and
> important feature that would help users with very large caches, that take a
> long time to get the proper hot set.  for example we can get pretty good
> cache row cache hits if we run the servers for a month or more as the data
> tends to settle down.
> --

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support