Mailbox Metadata Partitions — Cyrus IMAP 3.0.9 (stable) documentation

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# Mailbox Metadata Partitions

In addition to the mailbox and message data, Cyrus stores various metadata in the mail spool, such as indexes, annotations, etc. It may be useful in some circumstances to separate this metadata into its own partitions. For each partition to be split in this way, one must define a metadata partition for each data partition, using the same name, so Cyrus knows how to relate them to each other.

As well as specifying locations for the metadata, one must also tell Cyrus which metadata files to place in these special partitions. The default behaviour is to locate all metadata in the data partition(s).

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