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What is dovecot-ceph-plugin?

The goal of this project is the creation of a storage plugin for Dovecot, which enables the storage of emails in Ceph RADOS objects. The focus is currently on a hybrid model where the emails are stored in RADOS objects, while all other metadata (lists, index, cache) are stored in a file system that is located locally on the Dovecot server or on shared CephFS volumes. The latter allows the operation of Dovecot completely on Ceph.

As a bonus, a dictionary plugin is included, which allows the storage of Dovecot dictionaries in Ceph OMAPs.