Berkeley DB upgrade?
simon.matter at ch.sauter-bc.com
Tue Jul 11 13:58:08 EDT 2006
> Paul Boven wrote:
>> Hi everyone,
>> I'm planning an upgrade from a Cyrus-2.2.8 to Cyrus-2.2.12. However, we
>> will also be upgrading Berkeley from 4.1.25 to 4.4.20 because of some
>> performance issues with the first.
>> So now I'm wondering: should I call db_upgrade from Berkeley on each of
>> these databases? And which databases exactly would that be? This is a
>> stock standard 2.2.8, with no specific backends mentioned in the
>> imapd.conf or compiled in. What are the filenames/locations where I
>> should find Berkeley db files?
>> Some candidates:
>> /var/imap/mailboxes.db - but Berkeley-db fails to recognise that file,
>> so I can't dump it.
>> /var/imap/annotations.db - same problem.
>> /var/imap/tls_sessions.db is a Berkeley db-file, but one I could afford
>> to wipe during the upgrade.
>> /var/imap/deliver.db is a Berkeley db-file, but also one I could affort
>> to wipe.
> If it where me I would downgrade your bdb back to 4.1.25 so that you can
> read the files then export them to text format. Once you upgrade cyrus,
> import them into skiplist format and be done with bdb.
> I have a fairly large system and was always bumping into bdb problems so
> about a week ago I finally decided to go to skiplist format and haven't
> looked back.
> Skiplist should also make things easier next time you upgrade since it
> doesn't depend on external libraries and their versions.
I can second that. People using my rpms are using skiplist by default now
and I didn't get any negative feedback about it. But I got alot of
feedback from people who messed up with BDB.
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