summaryrefslogtreecommitdiffstats
path: root/xlators/mgmt/glusterd
diff options
context:
space:
mode:
authorBrian Foster <bfoster@redhat.com>2012-05-07 13:53:31 -0400
committerAnand Avati <avati@redhat.com>2012-06-07 19:07:52 -0700
commitcd439e79ca7b3b26b11fb894220550156936c354 (patch)
tree45a4db5abd538348e21502ff828f0fe0b6dac916 /xlators/mgmt/glusterd
parented648c3b393ec06d0da7c1a9af42286fb3cc978e (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/glusterd')
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-volgen.c1
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},