Christopher Chan wrote: >>>> I thought the usual ways of doing this were to either use a >>>> high-performance NFS server (netapp filer...) and maildir format so >>>> you can run imap from any client facing server, or to keep the >>>> delivery host information in an LDAP attribute that you find when >>>> validating the address. >>>> >>> >>> This is the 'I have the money' way of doing this ;-) >> >> There are at least 2 free ldap servers. Or if you are stuck with >> mysql you can probably add your own field for delivery host. > > The service provider I used to work for tried openldap in 98. They got > burned big time. Maybe it is up to the task today. What kind of > hardware, though, would you use for one that the OP indicates will get a > lot of writes? Everything I have read says LDAP is not for high write > problems. 1998 was a long time ago. Red Hat (fedora) directory server has claimed good performce for several years now. http://directory.fedoraproject.org/ But the openldap guys think they are better - see page 33 of the pdf linked from this page: http://www.mail-archive.com/ldap@umich.edu/msg01151.html (22000 queries/sec, 4800 updates/sec on a terabyte database with 150 million entries - but I think the test box had 480Gigs of RAM...) >> Does anyone have enough faith in a free NFS server to use it in this >> scenaro these days? How about opensolaris on top of zfs? >> > > I would say. No comment on opensolaris in this scenario but I am happy > with zfs as an offsite online backup solution. Are you using the incremental send/receive operation for this? -- Les Mikesell lesmikesell at gmail.com