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authorJeff Darcy <jdarcy@redhat.com>2016-03-31 17:15:37 -0400
committerJeff Darcy <jdarcy@redhat.com>2016-04-07 08:07:55 -0700
commit6602376e3e9e6d9f4f695475569322b61ccc2411 (patch)
tree58d4352c641b43615cccce363ce9f764e4cdd8eb /tests
parente6c7da3769105f0e6fc8b6627f3b11727a2a216d (diff)
dht: add "nuke" functionality for efficient server-side deletion
This turns a special xattr into an rmdir with flags set. When that hits the posix translator on the server side, that causes the file/directory to be moved into the special "landfill" directory. From there, the posix janitor thread will take care of deleting it entirely on the server side - traversing it recursively if necessary. A couple of secondary issues were fixed to make this effective. * FUSE now ensures that setxattr values are NUL terminated. * The janitor thread now gets woken up immediately when something is placed in 'landfill' instead of only when file descriptors need to be closed. * The default landfill-emptying interval was reduced to 10s. To use the feature, issue a setxattr something like this: setfattr -n glusterfs.dht.nuke -v "" /mnt/glusterfs/vol/some_dir The value doesn't actually matter; the mere receipt of a request with this key is sufficient. Some day it might be useful to allow setting a required value as a sort of password, so that only those who know it can access the underlying special functionality. Change-Id: I8a343c2cdb40a76d5a06c707191fb67babb8514f Signed-off-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-on: http://review.gluster.org/13878 Smoke: Gluster Build System <jenkins@build.gluster.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'tests')
-rwxr-xr-xtests/features/nuke.t41
1 files changed, 41 insertions, 0 deletions
diff --git a/tests/features/nuke.t b/tests/features/nuke.t
new file mode 100755
index 00000000000..ad9479ffaa5
--- /dev/null
+++ b/tests/features/nuke.t
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+
+create_files () {
+ mkdir $1
+ for i in $(seq 0 99); do
+ mkdir $1/dir$i
+ for j in $(seq 0 99); do
+ touch $1/dir$i/file$j
+ done
+ done
+}
+
+count_files () {
+ ls $1 | wc -l
+}
+
+LANDFILL=$B0/${V0}1/.glusterfs/landfill
+
+TEST glusterd
+
+TEST $CLI volume create $V0 $H0:$B0/${V0}1
+TEST $CLI volume start $V0
+TEST $GFS -s $H0 --volfile-id $V0 $M0
+
+TEST create_files $M0/foo
+TEST [ $(count_files $LANDFILL) = "0" ]
+
+# This should immediately send the whole directory to the landfill.
+TEST setfattr -n glusterfs.dht.nuke -v trinity $M0/foo
+
+# Make sure the directory's not visible on the mountpoint, and is visible in
+# the brick's landfill.
+TEST ! ls $M0/foo
+TEST [ $(count_files $LANDFILL) = "1" ]
+
+# Make sure the janitor thread cleans it up in a timely fashion.
+EXPECT_WITHIN 20 "0" count_files $LANDFILL
+
+cleanup