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Re: Performance Tests

by Stephan Böni :: Rate this Message:

>
> >>>Stephan Böni wrote:
> >>>- One system as single node OpenSSI cluster (not usable) has a
> >>>terrible r/w performance.
> >>>- Two systems (nodes) in a OpenSSI cluster have a good read
> >>>but still a terrible write performace.
> >>>
> >>>
> >>John Hughes [mailto:john@...] wrote:
> >>Do you have failover? Are you using "chard"?
> >>
> >Stephan Böni wrote:
> >
> >No failover. ext3 as root filesystem and reiserfs as data
> filesystem. The interconnection between the nodes is a
> separte GBit-LAN, but only on one single node the performance
> is poor (and on both filesystem types). I think it's a problem of CFS.
> >
>
> John Hughes [mailto:john@...] wrote:
>
> Interesting.
>
> How are you mesuring performance.

It's an own performance test application within a database system. (Intersystems Caaché)

> How big is the difference between standard kernel and OpenSSI kernel?

The OpenSSI kernel is 2,5 x slower than a standard kernel

> Which non-ssi kernel are you using?

2.6.8-24.19-bigsmp (SUSE 9.2)

Stephan

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