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by shrubble 544 days ago
The open-source Cyrus IMAP server which they mention using, has replication built-in. ZFS also has built-in replication available.

Deletion of files depends on how they have configured the message store - they may be storing a lot of data into a database, for example.
1 comments
mastax 544 days ago
ZFS replication is quite unreliable when used with ZFS native encryption, in my experience. Didn't lose data but constant bugs.
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brongondwana 543 days ago
Yeah, we're only using ZFS replication for logs; we're using the Cyrus replication for emails because it has other sanity checks and data model consistency enforcement which is really valuable.

(And both are async. We'd need something like drbd for real synchronous replication)

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