dht/rebalance: Throttle rebalance

Throttle value will be "normal" by default. For throttling down,
a thread will be put in to sleep. And for throttling up,
gf_defrag_process_dir will wake up the sleeping threads.

Change-Id: I74d530e3effd6e60e6eec81ccc8ff65789fa9c13
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/10526
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Tested-by: Raghavendra G <rgowdapp@redhat.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/tests/basic/distribute/throttle-rebal.t b/tests/basic/distribute/throttle-rebal.t
new file mode 100644
index 00000000000..89495aee71b
--- /dev/null
+++ b/tests/basic/distribute/throttle-rebal.t
@@ -0,0 +1,42 @@
+#!/bin/bash
+# Test to check
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+#Check rebal-throttle set option sanity
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/brick1 $H0:$B0/brick2
+TEST $CLI volume start $V0
+
+function set_throttle {
+        local level=$1
+        $CLI volume set $V0 cluster.rebal-throttle $level 2>&1 |grep -oE 'success|failed'
+}
+
+
+THROTTLE_LEVEL="lazy"
+EXPECT "success" set_throttle $THROTTLE_LEVEL
+EXPECT "$THROTTLE_LEVEL" echo `$CLI volume info | grep rebal-throttle | awk '{print $2}'`
+
+THROTTLE_LEVEL="normal"
+EXPECT "success" set_throttle $THROTTLE_LEVEL
+EXPECT "$THROTTLE_LEVEL" echo `$CLI volume info | grep rebal-throttle | awk '{print $2}'`
+
+
+THROTTLE_LEVEL="aggressive"
+EXPECT "success" set_throttle $THROTTLE_LEVEL
+EXPECT "$THROTTLE_LEVEL" echo `$CLI volume info | grep rebal-throttle | awk '{print $2}'`
+
+THROTTLE_LEVEL="garbage"
+EXPECT "failed" set_throttle $THROTTLE_LEVEL
+
+#check if throttle-level is still aggressive
+EXPECT "aggressive" echo `$CLI volume info | grep rebal-throttle | awk '{print $2}'`
+
+TEST $CLI volume stop $V0;
+TEST $CLI volume delete $V0;
+
+cleanup;