[CalendarServer-users] Migration question

Jason Miller jmiller at red-abstract.com
Tue Sep 20 07:19:47 PDT 2011

Good morning!

First off, I hope there's not an issue with asking Apple server-specific questions on this list. If that's an issue, I apologize, but this is somewhat documentation-related :)

What is the "preferred" method for migration of calendar data?

I have two use cases that I'm studying:

- Migration of users in an enterprise from local calendars or another server to a Snow or Lion calendar server

- Migration of users from Snow to Lion without using the upgrade installation (a migration installation instead)

In both cases, we've tried to use iCal to either back up a copy of the local client store to copy into the new server store. That generally works, but both calendar servers (Snow and Lion) will try to mail out new invitations. I've mitigated that before by disabling iMIP temporarily in serveradmin, which generally seems to work, but then there are some errors when the calendar server tries to resolve users on the invites:

HTTP/1.1: 500 Internal Server Error to operation CalDAVWriteEntityQueueableOperation

...after which you can revert to server or go offline. Revert to server's not a very good choice because it will revert to the non-existence of the item.

All in all, what is a good way to approach this migration? If you can provide some clues/pointers, I'm sure we can figure out the rest. This will be a very good migration document in the end, I'm sure. Unless I'm missing something, there's not a lot of information about this in the Lion server documentation.


Jason Miller
jmiller at red-abstract.com

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