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Diffstat (limited to 'doc/dev/delayed-delete.rst')
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diff --git a/doc/dev/delayed-delete.rst b/doc/dev/delayed-delete.rst new file mode 100644 index 000000000..31f3e6b97 --- /dev/null +++ b/doc/dev/delayed-delete.rst @@ -0,0 +1,13 @@ +========================= + CephFS delayed deletion +========================= + +The deletion of a file does not immediately remove its data. Each of the file's +underlying objects must be removed independently. If these objects were removed +immediately, the client would have to send ``size_of_file / stripe_size * +replication_count`` messages. This would consume significant bandwith and would +slow the client unacceptably. If snapshots exist, their existence can prevent +the deletion of objects associated with them. + +In these cases, such files are (1) marked as deleted on the MDS and (2) deleted +lazily. |