diff options
| author | Brian Foster <bfoster@redhat.com> | 2012-05-07 13:53:31 -0400 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2012-06-07 19:07:52 -0700 |
| commit | cd439e79ca7b3b26b11fb894220550156936c354 (patch) | |
| tree | 45a4db5abd538348e21502ff828f0fe0b6dac916 /xlators/mgmt | |
| parent | ed648c3b393ec06d0da7c1a9af42286fb3cc978e (diff) | |
cluster/stripe: implement the coalesce stripe file format
The coalesce file format for cluster/stripe condenses the striped
files to a contiguous layout. The elimination of holes in striped
files eliminates space wasted via local filesystem preallocation
heuristics and significantly improves read performance.
Coalesce mode is implemented with a new 'coalesce' xlator option,
which is user-configurable and disabled by default. The format of
newly created files is marked with a new 'stripe-coalesce' xattr.
Cluster/stripe handles/preserves the format of files regardless
of the current mode of operation (i.e., a volume can
simultaneously consist of coalesced and non-coalesced files).
Files without the stripe-coalesce attribute are assumed to have
the traditional format to provide backward compatibility.
extras/stripe-merge: support traditional and coalesce stripe formats
Update the stripe-merge recovery tool to handle the traditional
and coalesced file formats. The format of the file is detected
automatically (and verified) via the stripe-coalesce attributes.
BUG: 801887
Change-Id: I682f0b4e819f496ddb68c9a01c4de4688280fdf8
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.com/3282
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mgmt')
| -rw-r--r-- | xlators/mgmt/glusterd/src/glusterd-volgen.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c index 2a97e40522a..a01d2a773eb 100644 --- a/xlators/mgmt/glusterd/src/glusterd-volgen.c +++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c @@ -141,6 +141,7 @@ static struct volopt_map_entry glusterd_volopt_map[] = { {"cluster.choose-local", "cluster/replicate", NULL, NULL, DOC, 0}, {"cluster.stripe-block-size", "cluster/stripe", "block-size", NULL, DOC, 0}, + {"cluster.stripe-coalesce", "cluster/stripe", "coalesce", NULL, DOC, 0}, {VKEY_DIAG_LAT_MEASUREMENT, "debug/io-stats", "latency-measurement", "off", NO_DOC, 0}, {"diagnostics.dump-fd-stats", "debug/io-stats", NULL, NULL, NO_DOC, 0}, |