Thank you everyone for your input. My dataset is ~100G of size with 1 or 2 read intensive column families. The cluster has plenty of RAM. I'll start off small with 4G of row cache and monitor the success rate.
Katriel On Thu, Jan 23, 2014 at 9:17 PM, Robert Coli <rc...@eventbrite.com> wrote: > On Wed, Jan 22, 2014 at 11:13 PM, Katriel Traum <katr...@google.com>wrote: > >> I was if anyone has any pointers or some advise regarding using row cache >> vs leaving it up to the OS buffer cache. >> >> I run cassandra 1.1 and 1.2 with JNA, so off-heap row cache is an option. >> > > Many people have had bad experiences with Row Cache, I assert more than > have had a good experience. > > https://issues.apache.org/jira/browse/CASSANDRA-5357 > > Is the 2.1 era re-design of the row cache into something more conceptually > appropriate. > > The rule of thumb for row cache is that if your data is : > > 1) very hot > 2) very small > 3) very uniform in size > > You may win with it. IMO if you meet all of those criteria you should try > A/B the on-heap cache vs. off-heap in 1.1/1.2, especially if your cached > rows are frequently updated. > > > https://issues.apache.org/jira/browse/CASSANDRA-5348?focusedCommentId=13794634&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13794634 > > =Rob > >
