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| author | Susant Palai <spalai@redhat.com> | 2018-01-18 13:06:12 +0530 |
|---|---|---|
| committer | Shyamsundar Ranganathan <srangana@redhat.com> | 2018-02-06 14:33:30 +0000 |
| commit | a6aaf29d57274c452de057cb8d7b4bf4da0466b1 (patch) | |
| tree | 40c8f167a5e7428f8fa8345d56a6d30dd4ce60e9 /xlators/cluster/dht/src/dht-common.h | |
| parent | 0e6e25ae9e11a15771da796eff211ef1f1c43684 (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>
(cherry picked from commit 545a7ce6762a1b3a7b989b43a9d18b5b1b299df0)
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.h')
| -rw-r--r-- | xlators/cluster/dht/src/dht-common.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h index 91ba3418643..9671bbe1cbe 100644 --- a/xlators/cluster/dht/src/dht-common.h +++ b/xlators/cluster/dht/src/dht-common.h @@ -695,6 +695,8 @@ struct dht_conf { synclock_t link_lock; gf_boolean_t use_fallocate; + + gf_boolean_t force_migration; }; typedef struct dht_conf dht_conf_t; |