diff options
| author | Krutika Dhananjay <kdhananj@redhat.com> | 2014-05-21 17:47:03 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2014-06-02 03:56:46 -0700 |
| commit | db022ef7ecca77cbecbcc4c046b6d3aafd2cb86f (patch) | |
| tree | 0abb9a8bfb99ef814d1f994a60826d2a1c63b64c /xlators/features/quota/src | |
| parent | 0d26de1b0a4a0fbf7e33dab8bc46c38c179e8645 (diff) | |
cluster/dht: Fix min-free-disk calculations when quota-deem-statfs is on
PROBLEM:
As part of file creation, DHT sends a statfs call to all of its
sub-volumes and expects in return the local space consumption and
availability on each one of them. This information is used by DHT to
ensure that atleast min-free-disk amount of space is left on each
sub-volume in the event that there ARE other sub-volumes with more
space available.
But when quota-deem-statfs is enabled, quota xlator on every brick
unwinds the statfs call with volume-wide consumption of disk space.
This leads to miscalculation in min-free-disk algo, thereby misleading
DHT at some point, into thinking all sub-volumes have equal available
space, in which case DHT keeps sending new file creates to subvol-0,
causing it to become 100% full at some point although there ARE other
subvols with ample space available.
FIX:
The fix is to make quota_statfs() behave as if quota xlator weren't
enabled, thereby making every brick return only its local consumption
and disk space availability.
Change-Id: I211371a1eddb220037bd36a128973938ea8124c2
BUG: 1099890
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/7845
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/features/quota/src')
| -rw-r--r-- | xlators/features/quota/src/quota.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/xlators/features/quota/src/quota.c b/xlators/features/quota/src/quota.c index c3e730bd1fd..06ef9615a19 100644 --- a/xlators/features/quota/src/quota.c +++ b/xlators/features/quota/src/quota.c @@ -3808,16 +3808,24 @@ out: int32_t quota_statfs (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) { - quota_local_t *local = NULL; - int op_errno = 0; - int ret = -1; - quota_priv_t *priv = NULL; + int op_errno = 0; + int ret = -1; + int8_t ignore_deem_statfs = 0; + quota_priv_t *priv = NULL; + quota_local_t *local = NULL; priv = this->private; GF_ASSERT (loc); WIND_IF_QUOTAOFF (priv->is_quota_on, off); + ret = dict_get_int8 (xdata, GF_INTERNAL_IGNORE_DEEM_STATFS, + &ignore_deem_statfs); + ret = 0; + + if (ignore_deem_statfs) + goto off; + if (priv->consider_statfs && loc->inode) { local = quota_local_new (); if (!local) { |