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authorSusant Palai <spalai@redhat.com>2018-01-18 13:06:12 +0530
committerRaghavendra G <rgowdapp@redhat.com>2018-02-02 15:24:38 +0000
commit545a7ce6762a1b3a7b989b43a9d18b5b1b299df0 (patch)
tree0f2c3015697553914cb520dbda107f3843521f53 /xlators/mgmt/glusterd
parentd9f773ba719397c12860f494a8cd38109e4b2fe3 (diff)
cluster/dht: avoid overwriting client writes during migration
For more details on this issue see https://github.com/gluster/glusterfs/issues/308 Solution: This is a restrictive solution where a file will not be migrated if a client writes to it during the migration. This does not check if the writes from the rebalance and the client actually do overlap. If dht_writev_cbk finds that the file is being migrated (PHASE1) it will set an xattr on the destination file indicating the file was updated by a non-rebalance client. Rebalance checks if any other client has written to the dst file and aborts the file migration if it finds the xattr. updates gluster/glusterfs#308 Change-Id: I73aec28bc9dbb8da57c7425ec88c6b6af0fbc9dd Signed-off-by: Susant Palai <spalai@redhat.com> Signed-off-by: Raghavendra G <rgowdapp@redhat.com> Signed-off-by: N Balachandran <nbalacha@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd')
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-volume-set.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-volume-set.c b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
index 50827caaa0a..e293acfa2cc 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volume-set.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
@@ -1349,6 +1349,14 @@ struct volopt_map_entry glusterd_volopt_map[] = {
.flags = VOLOPT_FLAG_CLIENT_OPT,
},
+ { .key = "cluster.force-migration",
+ .voltype = "cluster/distribute",
+ .option = "force-migration",
+ .value = "off",
+ .op_version = GD_OP_VERSION_4_0_0,
+ .flags = VOLOPT_FLAG_CLIENT_OPT,
+ },
+
/* NUFA xlator options (Distribute special case) */
{ .key = "cluster.nufa",
.voltype = "cluster/distribute",