features/shard: Perform shards deletion in the background

A synctask is created that would scan the indices from
.shard/.remove_me, to delete the shards associated with the
gfid corresponding to the index bname and the rate of deletion
is controlled by the option features.shard-deletion-rate whose
default value is 100.
The task is launched on two accounts:
1. when shard receives its first-ever lookup on the volume
2. when a rename or unlink deleted an inode

Change-Id: Ia83117230c9dd7d0d9cae05235644f8475e97bc3
updates: bz#1568521
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/bugs/shard/bug-1568521.t b/tests/bugs/shard/bug-1568521.t
new file mode 100644
index 00000000000..167fb635ac8
--- /dev/null
+++ b/tests/bugs/shard/bug-1568521.t
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+
+
+function delete_files {
+        local mountpoint=$1;
+        local success=0;
+        local value=$2
+        for i in {1..500}; do
+                unlink $mountpoint/file-$i 2>/dev/null 1>/dev/null
+                if [ $? -eq 0 ]; then
+                        echo $2 >> $B0/output.txt
+                fi
+        done
+        echo $success
+}
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{0,1}
+TEST $CLI volume set $V0 features.shard on
+TEST $CLI volume set $V0 shard-block-size 4MB
+TEST $CLI volume start $V0
+
+TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0
+TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M1
+
+for i in {1..500}; do
+        dd if=/dev/urandom of=$M0/file-$i bs=1M count=2
+done
+
+for i in {1..500}; do
+        stat $M1/file-$i > /dev/null
+done
+
+delete_files $M0 0 &
+delete_files $M1 1 &
+wait
+
+success1=$(grep 0 $B0/output.txt | wc -l);
+success2=$(grep 1 $B0/output.txt | wc -l);
+
+echo "Success1 is $success1";
+echo "Success2 is $success2";
+
+success_total=$((success1 + success2));
+
+EXPECT 500 echo $success_total
+
+cleanup