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This document is for a development version of Ceph.

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CephFS delayed deletion

When you delete a file, the data is not immediately removed. Each object in the file needs to be removed independently, and sending size_of_file / stripe_size * replication_count messages would slow the client down too much, and use a too much of the clients bandwidth. Additionally, snapshots may mean some objects should not be deleted.

Instead, the file is marked as deleted on the MDS, and deleted lazily.