tier/ctr: Providing option to record or ignore metadata heat

Currently we heat up a file for both data and metadata write.
Here we provide a ctr xlator option called "ctr-record-metadata-heat"
were the admin can decide on recording metadata heat i.e heatup a
file on metadata writes or not.
Metadata data operation are
a. setattr: explicit changing of atime/mtime using utimes,
            changing of posix permissions of the file
b. rename: Renaming a file,
c. unlink, link: adding or deleting hardlinks
d. xattrs: setting or removal of xattrs.

NOTE: atime, mtime and ctime change through writev, readv, truncate, mknod
and create will not be considered here as these fops are data and primary
metadata fops.

Defaultly "ctr-record-metadata-heat" is off. Admin can
switch it on using gluster volume set command.

Change-Id: I91157509255dd5cb429cda2b6d4f64582e155e7b
BUG: 1279166
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Reviewed-on: http://review.gluster.org/12540
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/tests/basic/tier/record-metadata-heat.t b/tests/basic/tier/record-metadata-heat.t
new file mode 100755
index 00000000000..d36ed80591a
--- /dev/null
+++ b/tests/basic/tier/record-metadata-heat.t
@@ -0,0 +1,101 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+. $(dirname $0)/../../tier.rc
+
+NUM_BRICKS=3
+DEMOTE_FREQ=5
+DEMOTE_TIMEOUT=10
+PROMOTE_FREQ=5
+
+FILE="file1.txt"
+FILE_LINK="file2.txt"
+
+# Creates a tiered volume with pure distribute hot and cold tiers
+# Both hot and cold tiers will have an equal number of bricks.
+
+function create_dist_tier_vol () {
+        mkdir $B0/cold
+        mkdir $B0/hot
+        TEST $CLI volume create $V0 $H0:$B0/cold/${V0}{0..$1}
+        TEST $CLI volume set $V0 performance.quick-read off
+        TEST $CLI volume set $V0 performance.io-cache off
+        TEST $CLI volume set $V0 features.ctr-enabled on
+        TEST $CLI volume start $V0
+        TEST $CLI volume attach-tier $V0 $H0:$B0/hot/${V0}{0..$1}
+        TEST $CLI volume set $V0 cluster.tier-demote-frequency $DEMOTE_FREQ
+        TEST $CLI volume set $V0 cluster.tier-promote-frequency $PROMOTE_FREQ
+        TEST $CLI volume set $V0 cluster.read-freq-threshold 4
+        TEST $CLI volume set $V0 cluster.write-freq-threshold 4
+}
+
+
+cleanup;
+
+#Basic checks
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume info
+
+
+#Create and start a tiered volume
+create_dist_tier_vol $NUM_BRICKS
+
+# Mount FUSE
+TEST glusterfs -s $H0 --volfile-id $V0 $M0
+
+
+# The file will be created on the hot tier
+touch "$M0/$FILE"
+
+# Get the path of the file on the hot tier
+HPATH=`find $B0/hot/ -name  "$FILE"`
+echo "File path on hot tier: "$HPATH
+
+# Expecting the file to be on the hot tier
+EXPECT "yes" exists_and_regular_file $HPATH
+
+sleep_until_mid_cycle $DEMOTE_FREQ
+
+# Try to heat the file using 5 metadata operations
+# WITHOUT setting ctr-record-metadata-heat on
+touch "$M0/$FILE"
+chmod +x "$M0/$FILE"
+chown root "$M0/$FILE"
+ln "$M0/$FILE" "$M0/$FILE_LINK"
+rm -rf "$M0/$FILE_LINK"
+
+# Wait for the tier process to demote the file
+sleep $DEMOTE_TIMEOUT
+
+# Get the path of the file on the cold tier
+CPATH=`find $B0/cold/ -name  "$FILE"`
+echo "File path on cold tier: "$CPATH
+
+# Expecting the file to be on cold tier
+EXPECT "yes" exists_and_regular_file $CPATH
+
+#Set ctr-record-metadata-heat on
+TEST $CLI volume set $V0 ctr-record-metadata-heat on
+
+sleep_until_mid_cycle $DEMOTE_FREQ
+
+# Heating the file using 5 metadata operations
+touch "$M0/$FILE"
+chmod +x "$M0/$FILE"
+chown root "$M0/$FILE"
+ln "$M0/$FILE" "$M0/$FILE_LINK"
+rm -rf "$M0/$FILE_LINK"
+
+# Wait for the tier process to demote the file
+sleep $DEMOTE_TIMEOUT
+
+# Get the path of the file on the hot tier
+echo "File path on hot tier: "$HPATH
+
+# Expecting the file to be on the hot tier
+EXPECT "yes" exists_and_regular_file $HPATH
+
+cleanup;
+