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authorMatt Ahrens <[email protected]>2011-07-26 12:23:00 -0700
committerBrian Behlendorf <[email protected]>2011-08-01 12:09:11 -0700
commitf5fc4acaa77e2c1782a9495bbf1a39884b4c3940 (patch)
tree1d562e2608deaf93b5b65042f72e7e0f6b992750 /module/zfs/dsl_dataset.c
parent6d974228ef05366c546bb04198dafcb38785c16d (diff)
Illumos #1092: zfs refratio property
Add a "REFRATIO" property, which is the compression ratio based on data referenced. For snapshots, this is the same as COMPRESSRATIO, but for filesystems/volumes, the COMPRESSRATIO is based on the data "USED" (ie, includes blocks in children, but not blocks shared with the origin). This is needed to figure out how much space a filesystem would use if it were not compressed (ignoring snapshots). Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Richard Elling <[email protected]> Reviewed by: Mark Musante <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Approved by: Garrett D'Amore <[email protected]> References to Illumos issue and patch: - https://www.illumos.org/issues/1092 - https://github.com/illumos/illumos-gate/commit/187d6ac08a Signed-off-by: Brian Behlendorf <[email protected]> Issue #340
Diffstat (limited to 'module/zfs/dsl_dataset.c')
-rw-r--r--module/zfs/dsl_dataset.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c
index c34ac2a76..26362c95c 100644
--- a/module/zfs/dsl_dataset.c
+++ b/module/zfs/dsl_dataset.c
@@ -20,6 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
*/
#include <sys/dmu_objset.h>
@@ -2153,7 +2154,7 @@ dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
void
dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv)
{
- uint64_t refd, avail, uobjs, aobjs;
+ uint64_t refd, avail, uobjs, aobjs, ratio;
dsl_dir_stats(ds->ds_dir, nv);
@@ -2180,6 +2181,11 @@ dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv)
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY,
DS_IS_DEFER_DESTROY(ds) ? 1 : 0);
+ ratio = ds->ds_phys->ds_compressed_bytes == 0 ? 100 :
+ (ds->ds_phys->ds_uncompressed_bytes * 100 /
+ ds->ds_phys->ds_compressed_bytes);
+ dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRATIO, ratio);
+
if (ds->ds_phys->ds_next_snap_obj) {
/*
* This is a snapshot; override the dd's space used with
@@ -2187,10 +2193,7 @@ dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv)
*/
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED,
ds->ds_phys->ds_unique_bytes);
- dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO,
- ds->ds_phys->ds_compressed_bytes == 0 ? 100 :
- (ds->ds_phys->ds_uncompressed_bytes * 100 /
- ds->ds_phys->ds_compressed_bytes));
+ dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, ratio);
}
}