I'm using Cyrus replication. After several tests, it seems that the
single instance store facility is not replicated. I mean, the same
message sent to several recipient is stored once on the master, but
stored several times on the slave. Is there a special thing to do to
activate single instance store replication or it just doesn't exist yet?
Message UUIDs are used to replicate the single instance store (see
docs/text/install-replication). This won't have much effect when you first
replicate a mailstore as sync_server in 2.3 only tracks the last few
thousand messages that have been uploaded. It becomes much more effective
when a replica has been seeded and you switch to "rolling" replication.
After turning on "rolling" replication, 2 different hardlinks for the
same message has been created in /bulk/imap/spool/sync./ on the replica
( one per recipient ) but not the same hardlink for the same message in
the spool.
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