On Thu, May 5, 2011 at 6:16 PM, aaron morton <aa...@thelastpickle.com> wrote: > Hannes, > To get a baseline of behaviour set disk_access to standard. You will > probably want to keep it like that if you want better control over the memory > on the box.
Changing disk access mode just gives you the illusion of more control; the same buffering is happening except now you force Cassandra to do extra copies: http://wiki.apache.org/cassandra/FAQ#mmap The ONLY reason non-mmap'd i/o is still around is to support testing on 32bit machines. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
