[EMAIL PROTECTED] wrote:
Actually there are three alternativesOn Sun, 10 Nov 2002, [iso-8859-1] [EMAIL PROTECTED] wrote:hello, howto cluster for load balancing cyrus imap server ?There is doc/install-murder.html, but I suspect that isn't really what you want.
:) yes isn't what i want. I mean it is possible to split across several
server the same mailboxdb (shared file system? CXFS?).
a)client/server distributed FS (e.g. NFS)
b)symmetric shared FS (e.g. GFS)
c)asymmetric shared FS (e.g. C-XFS, QFS4.0)
In any case you ll have problems with the provided locking mechanisms and memory mapped files [mmap]. Even if the FS provides the same local unix semantics, you will notice, serious performance degrade due to the email-imap-cyrus I/O profile witch is random, write-heavy with small avg file sizes.
Despite the rumors, and if you are insist on trying a shared FS (like me), get ready for a SSD (Solid State Disk) solution for the Metadata server.
BTW:CMU guys, have you ever thought of using/testing Shared FS before going on Murder? (I dont mean NFS...)
Nikos Voutsinas
Network Operations Center
University Of Athens
