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/spa_impl.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/spa_impl.h')
| -rw-r--r-- | include/sys/spa_impl.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/sys/spa_impl.h b/include/sys/spa_impl.h index 929144017..ebe14dae4 100644 --- a/include/sys/spa_impl.h +++ b/include/sys/spa_impl.h @@ -49,6 +49,7 @@ #include <sys/dsl_crypt.h> #include <sys/zfeature.h> #include <sys/zthr.h> +#include <sys/dsl_deadlist.h> #include <zfeature_common.h> #ifdef __cplusplus @@ -317,6 +318,11 @@ struct spa { list_t spa_log_summary; uint64_t spa_log_flushall_txg; + zthr_t *spa_livelist_delete_zthr; /* deleting livelists */ + zthr_t *spa_livelist_condense_zthr; /* condensing livelists */ + uint64_t spa_livelists_to_delete; /* set of livelists to free */ + livelist_condense_entry_t spa_to_condense; /* next to condense */ + char *spa_root; /* alternate root directory */ uint64_t spa_ena; /* spa-wide ereport ENA */ int spa_last_open_failed; /* error if last open failed */ |