"clebert.suconic(a)jboss.com" wrote : Another thing.. about the 300 msg/second with NIO. | | I have a workstation with a SCSI (or as they call it now.. SAS) disk... and that is very fast at write, and it seems slow at sync. (maybe something on the OS?) That's why I got this rate of 350 messages / second. On the laptop where I have a regular disk I got about 1000 messages / second. Maybe because it actually syncs! On some cheaper disks/OS combinations when you sync it doesn't actually sync, just writes to the disks cache (note not the OS cache) for performance: http://www.sr5tech.com/write_back_cache_experiments.htm View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4153136#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...