[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Scaling UP tests

[timfox]

"clebert.suconic at 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



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