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authorshishir gowda <shishirng@gluster.com>2012-02-17 19:21:07 +0530
committerVijay Bellur <vijay@gluster.com>2012-02-19 04:47:50 -0800
commit4a65356275cda45f665dfa99d3712f6fb9087aff (patch)
tree43a58dd347e770073d26c13fd54522e3825d957b /xlators/cluster/dht/src/dht-common.c
parent6123265556e54891369cc79a72b670a4b23a8a41 (diff)
cluster/dht: Support for hardlink rebalance when decommissioning
The support for hardlink rebalance is only available for decommissioning of a node. this can be triggered in two ways 1. remove-brick start 2. if decommission node value is set in vol file, then a normal rebalance command The way we handle it is- if (nlink > 1) do * if src file doesnt have linkto xattr * mark src's linkto to the dst * else * perform a link on the dst * do a look up * if nlinks = dst.nlinks * migrate data * else * continue crawling done Signed-off-by: shishir gowda <shishirng@gluster.com> Change-Id: If43b5524b872fd1413e9f7aa7f436cb244e30d8d BUG: 763844 Reviewed-on: http://review.gluster.com/2737 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.c')
-rw-r--r--xlators/cluster/dht/src/dht-common.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index f76dba4..9f364d1 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -2145,7 +2145,7 @@ dht_setxattr (call_frame_t *frame, xlator_t *this,
data_t *tmp = NULL;
uint32_t dir_spread = 0;
char value[4096] = {0,};
- int forced_rebalance = 0;
+ gf_dht_migrate_data_type_t forced_rebalance = GF_DHT_MIGRATE_DATA;
int call_cnt = 0;
data_pair_t *trav = NULL;
@@ -2214,7 +2214,11 @@ dht_setxattr (call_frame_t *frame, xlator_t *this,
(ie, 'target' subvolume given there, etc) */
memcpy (value, tmp->data, tmp->len);
if (strcmp (value, "force") == 0)
- forced_rebalance = 1;
+ forced_rebalance =
+ GF_DHT_MIGRATE_DATA_EVEN_IF_LINK_EXISTS;
+
+ if (conf->decommission_in_progress)
+ forced_rebalance = GF_DHT_MIGRATE_HARDLINK;
local->rebalance.target_node = dht_subvol_get_hashed (this, loc);
if (!local->rebalance.target_node) {