While running TimeMachine on Mac OS X Server 10.6.3, some of my clients and I were experiencing problems with Open Directory. Almost every time backupd (TimeMachine) ran, slapd (OpenDirectory) would restart. Most of the time, this didn't cause any problems. However, every few days, users would be unable to login to services, some share points would be missing, etc. I believe I've found a temporary fix for the problem (until Apple releases an official fix).
Before TimeMachine would start, the process would call ServerBackup to export some service settings and Open Directory data. This is always when Open Directory would crash/restart and other services would be affected. ServerBackup runs based on plist files in /etc/server_backup. By simply moving these files, I've been able to avoid problems. (note: open directory will not back up with TImeMachine if you do this. you can manually create backups in Server Admin)
To move the files, issue the following commands in Terminal:
sudo mkdir /etc/server_backup.disabled
sudo mv /etc/server_backup/40-openDirectory.plist /etc/server_backup.disabled/
sudo mv /etc/server_backup/55-sharePoints.plist /etc/server_backup.disabled/
Moving these files back to their original location on my test server caused the problems to reoccur, so I'm confident in this temporary fix.
Tod's Blog
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