[CC the xrootd list and some others who might be interested..] Hi Andy, On Mon, Feb 28, 2005 at 10:19:03PM -0800, Andrew Hanushevsky wrote: > We've just completed our performance tests with memory mapped I/O. The > results were excellent. Server overhead decreased by 50% and client > latency was decreased by at least 20%. 100% network utilization can > now be easily reached. This is very good news for systems like proof. > > While memory mapped I/O produces excellent results it can only be used > in specific circumstances where you have a lot of memory and a 64-bit > address space. So, it is not on be default. Configuration is trivial > and you have a lot of options, including being able to specify precisely > which files should be memory mapped independently of the configuration > file. Very nice: a network-attached distributed memory cache... Pete ------------------------------------------------------------------------- Peter Elmer E-mail: [log in to unmask] Phone: +41 (22) 767-4644 Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland -------------------------------------------------------------------------