> 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 ? There has been some discussion about using NFSv4 with cyrus on this list recently. At least on Linux I think nobody had success, and we are still waiting to test with a current Solaris version. Maybe someone tried it in the mean time and is able to report. Simon ---- 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
