Nope, that's exactly how it works in Java too. On Thu, May 6, 2010 at 9:21 AM, Vick Khera <vi...@khera.org> wrote: > On Wed, May 5, 2010 at 8:08 PM, Kyusik Chung <kyu...@discovereads.com> wrote: >> if the data from the sstables hasnt already been loaded into memory by mmap, >> load it into memory; if you're out of memory on the box, swap some of the >> old mmapped data out of memory > > mmap() does not copy your data into memory; it maps your virtual > address space to the disk file, so you can treat the file as memory, > usually an array of bytes or structures. or is mmap on java different > than that in C? >
-- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
