From 2209f6d49bc8d16beed52b1d145be936d2da941a Mon Sep 17 00:00:00 2001 From: N Balachandran Date: Tue, 6 Sep 2016 11:13:20 +0530 Subject: cluster/dht: Skip layout overlap maximization on weighted rebalance dht_selfheal_layout_maximize_overlap () does not consider chunk sizes while calculating overlaps. Temporarily enabling this operation if only if weighted rebalance is disabled or all bricks are the same size. Change-Id: I5ed16cdff2551b826a1759ca8338921640bfc7b3 BUG: 1366494 Signed-off-by: N Balachandran Reviewed-on: http://review.gluster.org/15403 Smoke: Gluster Build System CentOS-regression: Gluster Build System Reviewed-by: Raghavendra G NetBSD-regression: NetBSD Build System --- xlators/cluster/dht/src/dht-selfheal.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) (limited to 'xlators') diff --git a/xlators/cluster/dht/src/dht-selfheal.c b/xlators/cluster/dht/src/dht-selfheal.c index ca7522442f1..bd4c236ffcd 100644 --- a/xlators/cluster/dht/src/dht-selfheal.c +++ b/xlators/cluster/dht/src/dht-selfheal.c @@ -1702,6 +1702,7 @@ dht_fix_layout_of_directory (call_frame_t *frame, loc_t *loc, dht_local_t *local = NULL; uint32_t subvol_down = 0; int ret = 0; + gf_boolean_t maximize_overlap = _gf_true; this = frame->this; priv = this->private; @@ -1748,9 +1749,18 @@ dht_fix_layout_of_directory (call_frame_t *frame, loc_t *loc, "subvolume %d (%s): %u chunks", i, priv->subvolumes[i]->name, priv->du_stats[i].chunks); + + /* Maximize overlap if the bricks are all the same + * size. + * This is probably not going to be very common on + * live setups but will benefit our regression tests + */ + if (i && (priv->du_stats[i].chunks + != priv->du_stats[0].chunks)) { + maximize_overlap = _gf_false; + } } - } - else { + } else { gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_NO_DISK_USAGE_STATUS, "no du stats ?!?"); } @@ -1760,9 +1770,16 @@ dht_fix_layout_of_directory (call_frame_t *frame, loc_t *loc, dht_layout_sort_volname (new_layout); dht_selfheal_layout_new_directory (frame, loc, new_layout); - /* Now selectively re-assign ranges only when it helps */ - dht_selfheal_layout_maximize_overlap (frame, loc, new_layout, layout); + /* Maximize overlap if weighted-rebalance is disabled */ + if (!priv->do_weighting) + maximize_overlap = _gf_true; + + /* Now selectively re-assign ranges only when it helps */ + if (maximize_overlap) { + dht_selfheal_layout_maximize_overlap (frame, loc, new_layout, + layout); + } done: if (new_layout) { /* Now that the new layout has all the proper layout, change the -- cgit