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Illumos 4976-4984 - metaslab improvements

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4976 zfs should only avoid writing to a failing non-redundant top-level vdev
4978 ztest fails in get_metaslab_refcount()
4979 extend free space histogram to device and pool
4980 metaslabs should have a fragmentation metric
4981 remove fragmented ops vector from block allocator
4982 space_map object should proactively upgrade when feature is enabled
4983 need to collect metaslab information via mdb
4984 device selection should use fragmentation metric
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  https://www.illumos.org/issues/4976
  https://www.illumos.org/issues/4978
  https://www.illumos.org/issues/4979
  https://www.illumos.org/issues/4980
  https://www.illumos.org/issues/4981
  https://www.illumos.org/issues/4982
  https://www.illumos.org/issues/4983
  https://www.illumos.org/issues/4984
  https://github.com/illumos/illumos-gate/commit/2e4c998

Notes:
    The "zdb -M" option has been re-tasked to display the new metaslab
    fragmentation metric and the new "zdb -I" option is used to control
    the maximum number of in-flight I/Os.

    The new fragmentation metric is derived from the space map histogram
    which has been rolled up to the vdev and pool level and is presented
    to the user via "zpool list".

    Add a number of module parameters related to the new metaslab weighting
    logic.

Ported by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2595
This commit is contained in:
George Wilson
2014-07-19 12:19:24 -08:00
committed by Brian Behlendorf
parent f67d709080
commit f3a7f6610f
18 changed files with 839 additions and 246 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zpool/zpool_main.c
+13 -5
View File
@@ -2998,10 +2998,16 @@ print_one_column(zpool_prop_t prop, uint64_t value, boolean_t scripted)
boolean_t fixed;
size_t width = zprop_width(prop, &fixed, ZFS_TYPE_POOL);
zfs_nicenum(value, propval, sizeof (propval));
if (prop == ZPOOL_PROP_EXPANDSZ && value == 0)
(void) strlcpy(propval, "-", sizeof (propval));
else if (prop == ZPOOL_PROP_FRAGMENTATION && value == ZFS_FRAG_INVALID)
(void) strlcpy(propval, "-", sizeof (propval));
else if (prop == ZPOOL_PROP_FRAGMENTATION)
(void) snprintf(propval, sizeof (propval), "%llu%%",
(unsigned long long)value);
else
zfs_nicenum(value, propval, sizeof (propval));
if (scripted)
(void) printf("\t%s", propval);
@@ -3034,9 +3040,9 @@ print_list_stats(zpool_handle_t *zhp, const char *name, nvlist_t *nv,
/* only toplevel vdevs have capacity stats */
if (vs->vs_space == 0) {
if (scripted)
(void) printf("\t-\t-\t-");
(void) printf("\t-\t-\t-\t-");
else
(void) printf(" - - -");
(void) printf(" - - - -");
} else {
print_one_column(ZPOOL_PROP_SIZE, vs->vs_space,
scripted);
@@ -3044,6 +3050,8 @@ print_list_stats(zpool_handle_t *zhp, const char *name, nvlist_t *nv,
scripted);
print_one_column(ZPOOL_PROP_FREE,
vs->vs_space - vs->vs_alloc, scripted);
print_one_column(ZPOOL_PROP_FRAGMENTATION,
vs->vs_fragmentation, scripted);
}
print_one_column(ZPOOL_PROP_EXPANDSZ, vs->vs_esize,
scripted);
@@ -3128,8 +3136,8 @@ zpool_do_list(int argc, char **argv)
int ret = 0;
list_cbdata_t cb = { 0 };
static char default_props[] =
"name,size,allocated,free,capacity,dedupratio,"
"health,altroot";
"name,size,allocated,free,fragmentation,capacity,"
"dedupratio,health,altroot";
char *props = default_props;
unsigned long interval = 0, count = 0;
zpool_list_t *list;