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| author | Heinz Mauelshagen <mauelshagen@redhat.com> | 2013-03-01 22:45:52 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-03-01 22:45:52 +0000 |
| commit | 8735a8134786fa4ef36dee65d7fa779b99ba5fe3 (patch) | |
| tree | 0049cda7a855a2ba7d3e0c4628d983a8466fafbc /Documentation/device-mapper | |
| parent | f283635281132af7bc7b90af3c105b8c0f73b9c7 (diff) | |
| download | lwn-8735a8134786fa4ef36dee65d7fa779b99ba5fe3.tar.gz lwn-8735a8134786fa4ef36dee65d7fa779b99ba5fe3.zip | |
dm cache: add cleaner policy
A simple cache policy that writes back all data to the origin.
This is used to decommission a dm cache by emptying it.
Signed-off-by: Heinz Mauelshagen <mauelshagen@redhat.com>
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'Documentation/device-mapper')
| -rw-r--r-- | Documentation/device-mapper/cache-policies.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/device-mapper/cache-policies.txt b/Documentation/device-mapper/cache-policies.txt index 731879f97b80..d7c440b444cc 100644 --- a/Documentation/device-mapper/cache-policies.txt +++ b/Documentation/device-mapper/cache-policies.txt @@ -53,6 +53,11 @@ since spindles tend to have good bandwidth. The io_tracker counts contiguous I/Os to try to spot when the io is in one of these sequential modes. +cleaner +------- + +The cleaner writes back all dirty blocks in a cache to decommission it. + Examples ======== |