Christopher Chan wrote: >>> >>> 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/ > > Yeah, well, I guess the Fedora Directory server is unlikely to drop its > entire datastore and will actually keep running but hey, are you going > to migrate back to ldap if you have a system that is distributed across > different mysql boxes running on cheap boxes and does its job? Yes, I've had enough trouble with mysql that I'd look for any alternative, but to be far that was a few years back too. >> 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...) > > There you go. If you have the hardware, you can do openldap. 480Gigs? > Did you add an extra zero? I copied it from this email post. http://www.redhat.com/archives/fedora-directory-users/2007-July/msg00113.html >>>> 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? >> > > Huh? This is just rsync for the vpopmail maildir, user home directories, > pervasive database files and scp for an Exchange backup file and then > snapshotting on the zfs volume for the vpopmail and user home > directories. Nothing heavy. What is this incremental send/receive > operation that you are talking about? zfs has the ability to make filesystem snapshots, then back them up with a send/receive operation. See bottom of this page http://docs.sun.com/app/docs/doc/819-5461/ftyxi?a=view. I haven't used it myself but it sounds handy. -- Les Mikesell lesmikesell at gmail.com