[horde] memcache sessions question

[Kevin Konowalec]

We've just switched over to using memcached sessions.  It's SMOKING  
fast and working well so far but in my logs I'm seeing a LOT of  
"Error retrieving session data" errors.  We did have a  
misconfiguration this morning where the /tmp directory wasn't  
properly permitted and so the session lock files weren't writing so  
could this just be an artifact from that or could there be more going  
on here?

We're running a 12 machine cluster with PF round robining.  Users  
only have the chance of being redirected to a different server if  
they sit inactive for 10 minutes - in that case I can see this error  
making sense since the lockfile is on a different machine.

So if anyone else is doing it similarly and can tell me if this is  
normal or if there's something else that needs to be tweaked that'd  
be great!

OH... also if anyone is doing any regular session cleanup with  
memcached I'd also like to know about that too....

Thanks!!

Kevin