[ceph.git] / ceph / doc / dev / delayed-delete.rst

=========================
 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.
Commit	Line	Data
7c673cae FG	1	=========================
	2	CephFS delayed deletion
	3	=========================
	4
	5	When you delete a file, the data is not immediately removed. Each
	6	object in the file needs to be removed independently, and sending
	7	``size_of_file / stripe_size * replication_count`` messages would slow
	8	the client down too much, and use a too much of the clients
	9	bandwidth. Additionally, snapshots may mean some objects should not be
	10	deleted.
	11
	12	Instead, the file is marked as deleted on the MDS, and deleted lazily.