Need guidelines on how to migrate a Cyrus-Imapd server

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Hello,

I'm trying to migrate a Cyrus-Imapd serveur running on an old machine to 
a new virtual machine environement and I'd like to have to guidelines on 
how to proceed.

I've first thought about using the Cyrus-Imapd replication feature, but 
the first import using sync_client was causing he target server to use 
far more space on disk that the used space ont he original serveur. My 
guess is that the hardlinks dedeuplication was not preserved during this 
transfer. I don't know if this is due to the way I'v ran the tool or if 
this is a limitation of sync_client itself. Can someone answer me on 
this ? If sync_client is able to preserve hardlinks deduplication, what 
would be the correct way to run it (I've not found the syntax expected 
for the <client-list-file> in the command "sync_client -u -f 
<client-list-files>" so I used a "for" loop and ran sync_client 
indicidually on each user).

Then, I've tried the rsync solution (synching the mailbox directory and 
config directory), but I'm switching to a 64bits OS so I'll have to 
convert the databases and import them. Is it a recommended solution ?

Thanks in advance for your help,
Thibault
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