On 04 Oct 2007, at 18:33, Vincent Fox wrote: > Interesting, but this is approximately 15K users per backend. > Which is > where we are now after 30K users per backend were crushed. I am much > more interested in exploring whether Cyrus hits some tipping point > where > a single backend cannot handle more than X users. Cyrus has lots of inherent limits, but nothing as concrete as what you're hypothesizing. From your problem description, it sounds very much like your users were demanding more IO than your systems had available. A problem like that can be addressed a number of way: throw more hardware at it; cache more data; identify users on the abusive end and help them reconfigure; etc. Each solution depends on your available resources: capital dollars; programming & sysadmin resources; user support; etc. Pin pointing exactly which bottleneck you hit is not easy to do for someone without detailed access to accounting data. Pin pointing what resource(s) you have available to address the problem(s) requires an understanding of your resources. :wes ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
