[Gluster-users] client-side cpu usage, performance issue

John Madden jmadden at ivytech.edu
Tue Dec 8 14:53:23 UTC 2009

> you could study the hints and configurations that MUST be tweaked for YOUR hw,
> sw, network, and app behaviour. 
> It was used for php sessions for a groupware:
> http://www.techforce.com.br/news/linux_blog/glusterfs_tuning_small_files
> The client side and server caches, the flush periods, and io-threads count are
> *critically* dependent of hw, net, and app behaviour.

I hear you, I had followed this article specifically in an attempt to 
improve performance.  I suppose I'm hoping for more specifics on how 
these values correspond to an application, a number of cpu's, a brand of 
network card, etc.  io-threads counts, for example, only seem to drive 
load average higher, as they all sit there chewing up cpu anyway, so you 
lower them and get lower overall system load but higher latency.  But 
why would the glusterfs process need cpu time anyway?


John Madden
Sr UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden at ivytech.edu

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