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authorSusant Palai <spalai@redhat.com>2018-01-18 13:06:12 +0530
committerRaghavendra G <rgowdapp@redhat.com>2018-02-02 15:24:38 +0000
commit545a7ce6762a1b3a7b989b43a9d18b5b1b299df0 (patch)
tree0f2c3015697553914cb520dbda107f3843521f53 /tests/basic/distribute/force-migration.t
parentd9f773ba719397c12860f494a8cd38109e4b2fe3 (diff)
cluster/dht: avoid overwriting client writes during migration
For more details on this issue see https://github.com/gluster/glusterfs/issues/308 Solution: This is a restrictive solution where a file will not be migrated if a client writes to it during the migration. This does not check if the writes from the rebalance and the client actually do overlap. If dht_writev_cbk finds that the file is being migrated (PHASE1) it will set an xattr on the destination file indicating the file was updated by a non-rebalance client. Rebalance checks if any other client has written to the dst file and aborts the file migration if it finds the xattr. updates gluster/glusterfs#308 Change-Id: I73aec28bc9dbb8da57c7425ec88c6b6af0fbc9dd Signed-off-by: Susant Palai <spalai@redhat.com> Signed-off-by: Raghavendra G <rgowdapp@redhat.com> Signed-off-by: N Balachandran <nbalacha@redhat.com>
Diffstat (limited to 'tests/basic/distribute/force-migration.t')
-rw-r--r--tests/basic/distribute/force-migration.t50
1 files changed, 50 insertions, 0 deletions
diff --git a/tests/basic/distribute/force-migration.t b/tests/basic/distribute/force-migration.t
new file mode 100644
index 0000000..f6c4997
--- /dev/null
+++ b/tests/basic/distribute/force-migration.t
@@ -0,0 +1,50 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+#This tests checks if the file migration fails with force-migration
+#option set to off.
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/${V0}0 $H0:$B0/${V0}1
+TEST $CLI volume set $V0 performance.quick-read off
+TEST $CLI volume set $V0 performance.io-cache off
+TEST $CLI volume set $V0 performance.write-behind off
+TEST $CLI volume set $V0 performance.stat-prefetch off
+TEST $CLI volume set $V0 performance.read-ahead off
+TEST $CLI volume start $V0
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0
+TEST touch $M0/file
+#This rename creates a link file for tile in the other brick.
+TEST mv $M0/file $M0/tile
+#Lets keep writing to the file which will have a open fd
+dd if=/dev/zero of=$M0/tile bs=1b &
+bg_pid=$!
+#Now rebalance will try to skip the file
+TEST $CLI volume set $V0 force-migration off
+TEST $CLI volume rebalance $V0 start force
+EXPECT_WITHIN $REBALANCE_TIMEOUT "completed" rebalance_status_field $V0
+skippedcount=`gluster v rebalance $V0 status | awk 'NR==3{print $6}'`
+TEST [[ $skippedcount -eq 1 ]]
+#file should be migrated now
+TEST $CLI volume set $V0 force-migration on
+TEST $CLI volume rebalance $V0 start force
+EXPECT_WITHIN $REBALANCE_TIMEOUT "completed" rebalance_status_field $V0
+skippedcount=`gluster v rebalance $V0 status | awk 'NR==3{print $6}'`
+rebalancedcount=`gluster v rebalance $V0 status | awk 'NR==3{print $2}'`
+TEST [[ $skippedcount -eq 0 ]]
+TEST [[ $rebalancedcount -eq 1 ]]
+kill -9 $bg_pid > /dev/null 2>&1
+wait > /dev/null 2>&1
+cleanup
+#Bad test because we are not sure writes are happening at the time of
+#rebalance. We need to write a test case which makes sure client
+#writes happen during rebalance. One way would be to set S+T bits on
+#src and write to file from client and then start rebalance. Currently
+#marking this as bad test.
+#G_TESTDEF_TEST_STATUS_CENTOS6=BAD_TEST,BUG=000000
+