cyrus imapd cluster with LVS

Hello i'm planing a mail cluster with loadbalancing and high availability. I made some test with linux virtual server and apache. And that looks good for me. But i don't know how to share the database from cyrus on more servers. Maybe this is possible with Global file system from Sistina ? I have

upgrade from 2.0.16 to 2.1.12

Hello i tried to take the mailboes.db from an 2.0.16 version and reconstruct it on the 2.1.12 whithout success. i dumped it with ctl_mboxlist ./ctl_mboxlist -d > list and import it with cat list | ctl_mbox_list -u on the new server also whithout success. when i run chk_cyrus he always says chdi