Hallo Klaus, 2008/6/6 Klaus Steinberger <klaus.steinberger@xxxxxxxxxxxxxxxxxxxxxx>: >> I'm seeing some weird behaviour with the pop3 daemon on a GFS HA >> cluster with load balancing. > > I would not advise running cyrus-imapd on top of GFS. GFS is even with the > best tuning possible very slow regarding small files (the typical load type > of a cyrus-imapd). GFS runs into heavy locking with that type of load. So > don't do it. Thanks for the advice, but currently I am tied to that setup, due that we are operating on a schedule, and are nearly going live with that. And I just can't afford to redo everything at the moment. But I will monitor performance very closely, will have a fallback plan if it just doesn't do what I expect it to do, and I will start with a low load on it. If you guys are interested in that setup, I will keep you updated how the things progress :) > Current size of my Imap Server is 2500 users and currently 250 GByte of > Mailboxes used (growing and growing). Well, we will be talking about something in the range of above 50k mailboxes, so a single machine is just out of question. And some sort of standby will be needed. I didn't do the concept for this system, though, I'm just the one who has to implement it ;) > I don't see how to avoid a murder setup if you need more than one machine > running cyrus-imapd in parallel. Well, there are other possibilities I have seen, especially together with perdition and an LDAP server (which we have here anyways). But that is more in the region of an active-passive setup instead of an active-active setup. And I must admit that I don't know murder that well, only that it logs very little into the logfiles when delivering a mail ;) I don't think I can easily go away from the current setup I'm working on, but I will monitor it very closely. As I said in the other mail, I have solved the problem I had, but the performance is behind my expectations. So I will need to do some more testing to confirm if I can go live with that cluster. Regards, Jens ---- 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
