diff options
| author | Sara Hartse <[email protected]> | 2019-07-26 10:54:14 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2019-07-26 10:54:14 -0700 |
| commit | 37f03da8ba6e1ab074b503e1dd63bfa7199d0537 (patch) | |
| tree | 987b03643c33cd43b246a20aea28b8750f7b4ee6 /include/sys/dmu_objset.h | |
| parent | d274ac54609894d00a49c0a0da89abd3a7f3998d (diff) | |
Fast Clone Deletion
Deleting a clone requires finding blocks are clone-only, not shared
with the snapshot. This was done by traversing the entire block tree
which results in a large performance penalty for sparsely
written clones.
This is new method keeps track of clone blocks when they are
modified in a "Livelist" so that, when it’s time to delete,
the clone-specific blocks are already at hand.
We see performance improvements because now deletion work is
proportional to the number of clone-modified blocks, not the size
of the original dataset.
Reviewed-by: Sean Eric Fagan <[email protected]>
Reviewed-by: Matt Ahrens <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Serapheim Dimitropoulos <[email protected]>
Signed-off-by: Sara Hartse <[email protected]>
Closes #8416
Diffstat (limited to 'include/sys/dmu_objset.h')
| -rw-r--r-- | include/sys/dmu_objset.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sys/dmu_objset.h b/include/sys/dmu_objset.h index c0650bcde..9b6614e98 100644 --- a/include/sys/dmu_objset.h +++ b/include/sys/dmu_objset.h @@ -126,7 +126,7 @@ struct objset { zfs_cache_type_t os_secondary_cache; zfs_sync_type_t os_sync; zfs_redundant_metadata_type_t os_redundant_metadata; - int os_recordsize; + uint64_t os_recordsize; /* * The next four values are used as a cache of whatever's on disk, and * are initialized the first time these properties are queried. Before |