Re: sync_log_chain - is it always needed?
"ellie timoney" <[email protected]>
| Newsgroups | gmane.mail.imap.cyrus |
|---|---|
| Message-ID | <[email protected]> |
On Thu, Apr 30, 2020, at 12:29 AM, Olaf Frączyk wrote: > However why the sync_log_chain could be not always active? As the server > catches all changes from LMTP, IMAP, POP anyway, why to use a special > option for the synchronization protocol? Why to treat replication > changes differently from LMTP/IMAP? If we want replication - we want to > catch all changes - regardless of the source, if we don't do replication > - we don't need to catch any changes. The rolling sync_client takes care of cleaning up each sync_log file as it finishes replicating it downstream. Now consider the case where your replica is an end point, not a link in a chain: it does not have a rolling sync_client forwarding replications on, so if it automatically logged incoming replications to the sync_log, the sync_log would simply grow forever and fill the disk. You would need to set up a special job to delete it.... Better to simply not write it in the first place! Thus, the default is to sync_log_chain: off, and if you need the special-case chaining behaviour, you turn it on. Cheers, ellie ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus