Hi, I am currently trying to gather informations on the cyrus vs NFS situation. I'm sorry if this has been asked several times on the mailing list, what I need is some details, to understand correctly the situation and evaluate the viability of some projects. The FAQ and some messages mention that it is unsafe, for ex: http://www.irbs.net/internet/info-cyrus/0503/0238.html http://kolab.org/pipermail/kolab-devel/2005-July/004033.html As I understand, there are two problems: * using locks is unsafe on NFS, especially for db files * some problems with mmap It seems that recent changes (say, last 4-6 months) in the linux kernel have been made to try to solve this problem. Some informations: - linux/debian etch (kernel 2.6.18) - postfix (2.3) + cyrus-murder + cyrus imap (2.2.10) - backend would be connected to a NAS. It could get up to 10k IMAP connections (simultaneous), while the postfix could receive 500k mails per day So, here are my questions: - did the situation change ? - is it possible to know precisely if a backend will work or not with NFS ? Known working (or not-working) situations ? - is there a way to avoid the problem, or to test if it is still present ? Thanks Regards, Pierre ---- 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
