On Wed, Jun 12, 2013 at 02:27:05PM +0200, Robert Schetterer wrote: > Hi @ll i have a question about feature > Shared Writeable MMAP and its relation to concurent file use. > > Background, over years i am hosting dovecot imap servers behind > loadbalancers on a drbd master/master setup shared formated storage > ocfs2 1.4.3 maildir without problems. > > the dovecot wiki says > > http://wiki2.dovecot.org/Director > > Director can be used by Dovecot's IMAP/POP3/LMTP proxy to keep a > temporary user -> mail server mapping. As long as user has simultaneous > connections, the user is always redirected to the same server. Each > proxy server is running its own director process, and the directors are > communicating the state to each others. Directors are mainly useful for > setups where all of the mail storage is seen by all servers, such as > with NFS or a cluster filesystem > > so the director service is most installed on the loadbalancers mainly > with nfs storage, proved to be a "must have" > > after online investigation and long lasting reality tests , i guess "or > a cluster filesystem " isnt true for ocfs2, cause on drbd it works fine > with concurent files use ( i.e mailbox format maildir ) by feature > Shared Writeable MMAP. > > Can sombody confirm this, or teach in easy words how it works ( or not ) > and why ?
I'm not sure what you are asking. I *think* you are saying, "ocfs2 is not a sufficient cluster filesystem for Dovecot, because it does not have shared writeable mmap(2)." If that's what you are saying, then you are incorrect. Shared writeable mmap(2) is a very standard feature of ocfs2; we can't be POSIX without it. I also don't understand how you are configured. Because it sounds like you are using ocfs2+drbd successfully, which conflicts with your statement that ocfs2 is not a sufficient cluster filesystem. Joel > > > Best Regards > MfG Robert Schetterer > > -- > [*] sys4 AG > > http://sys4.de, +49 (89) 30 90 46 64 > Franziskanerstraße 15, 81669 München > > Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 > Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer > Aufsichtsratsvorsitzender: Florian Kirstein > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > https://oss.oracle.com/mailman/listinfo/ocfs2-users -- Life's Little Instruction Book #451 "Don't be afraid to say, 'I'm sorry.'" http://www.jlbec.org/ jl...@evilplan.org _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-users