Migrating Spamassassin Bayes DB

Question

I am migrating a 10.5 mailserver to new hardware running 10.6.
The old mailserver uses a global spamassassin db stored in /var/amavis/.spamassassin and the files in this dir are as follows:
-rw------- 1 _amavisd _amavisd 42123264 Dec 8 22:42 auto-whitelist
-rw------- 1 _amavisd _amavisd 25272 Dec 8 22:42 bayes_journal
-rw------- 1 _amavisd _amavisd 41549824 Dec 8 22:25 bayes_seen
-rw------- 1 _amavisd _amavisd 5115904 Dec 8 22:25 bayes_toks
What is the best way to migrate this bayes db to the new server?
I thought:
sa-learn --backup > backup.txt
might work, but this yields basically an empty output file.
Tips?
Rusty
Message was edited by: Rusty Ross

Answer 1

Thanks, Alex.
I used spamtrainer.
A couple questions on that. The first time I ran spamtrainer -r on the new machine, I got a message from spamtrainer that /var/amavis/.spamassassin did not exist, and then spamtrainer went ahead to create the following two files in /var/amavis:
-rw------- 1 _amavisd _amavisd 41582592 Dec 9 13:21 .spamassassin_seen
-rw------- 1 _amavisd _amavisd 4202496 Dec 9 13:21 .spamassassin_toks
So then, I created /var/amavis/.spamassassin and rain spamtrainer -r again.
This time, spamtrainer created the following two files in /var/amavis/.spamassassin:
-rw------- 1 _amavisd _amavisd 41582592 Dec 9 13:26 bayes_seen
-rw------- 1 _amavisd _amavisd 4202496 Dec 9 13:26 bayes_toks
...which seems right to me.
Two questions.
(1) Can I safely delete .spamassassin_seen and .spamassassin_toks in /var/amavis now?
(2) Should I be concerned that spamtrainer didn't seem to migrate bayes_journal and auto-whitelist?
Thanks.