[OpenAFS] Suspect AFS bottlenecks on a web server

Jason Edgecombe jason@rampaginggeek.com
Sat, 21 Nov 2009 10:45:25 -0500

Simon Wilkinson wrote:
> On 21 Nov 2009, at 15:10, Jason Edgecombe wrote:
>> 1. My web server is on solaris, currently.
> Yeh, I should learn to read. Sorry.
>> 2. How do I disable dynamic vcache support?
> If you're on Solaris, you don't need to. Ignore that bit!
>> 3. I'm rolling 1.4.10 because I already have it compiled and packaged 
>> for deployment. (using the AFS package program, if that matters). I 
>> have already tested these binaries on other machines. Recompiling 
>> would require restarting the whole test cycle.
>> I have some data that suggests I need to increase the size of the 
>> vcache. It's about a 5% miss rate vs 2% miss rate on the dcache. I'll 
>> tweak the vcache size if the upgrade doesn't improve things.
> If you're seeing a contention problem, that it's possible that a 
> larger vcache won't help. But it's worth giving it a go.

Thanks for the info about Linux. This will be very useful when we 
migrate the web server to Linux.