[Test] Check perfromance of ls on distributed volumes

Test case:
1. Create a volume of type distributed-replicated or
   distributed-arbiter or distributed-dispersed and start it.
2. Mount the volume to clients and create 2000 directories
   and 10 files inside each directory.
3. Wait for I/O to complete on mount point and perform ls
   (ls should complete within 10 seconds).

Change-Id: I5c08c185f409b23bd71de875ad1d0236288b0dcc
Signed-off-by: kshithijiyer <kshithij.ki@gmail.com>

1 files changed, 105 insertions, 0 deletions

diff --git a/tests/functional/dht/test_time_taken_for_ls.py b/tests/functional/dht/test_time_taken_for_ls.py
new file mode 100644
index 000000000..7c9653999
--- /dev/null
+++ b/tests/functional/dht/test_time_taken_for_ls.py
@@ -0,0 +1,105 @@
+#  Copyright (C) 2020 Red Hat, Inc. <http://www.redhat.com>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along`
+#  with this program; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+from glusto.core import Glusto as g
+from glustolibs.gluster.gluster_base_class import GlusterBaseClass, runs_on
+from glustolibs.gluster.exceptions import ExecutionError
+
+
+@runs_on([['distributed-replicated', 'distributed-arbiter',
+           'distributed-dispersed'], ['glusterfs']])
+class TestTimeForls(GlusterBaseClass):
+
+    def setUp(self):
+
+        self.get_super_method(self, 'setUp')()
+
+        # Setup Volume
+        if not self.setup_volume_and_mount_volume(self.mounts):
+            raise ExecutionError("Failed to Setup and mount volume")
+
+        self.is_io_running = False
+
+    def tearDown(self):
+
+        if self.is_io_running:
+            self._validate_io()
+
+        if not self.unmount_volume_and_cleanup_volume(self.mounts):
+            raise ExecutionError("Failed to Cleanup Volume")
+
+        # Calling GlusterBaseClass tearDown
+        self.get_super_method(self, 'tearDown')()
+
+    def _validate_io(self):
+        """Validare I/O threads running on mount point"""
+        io_success = []
+        for proc in self.proc_list:
+            try:
+                ret, _, _ = proc.async_communicate()
+                if ret:
+                    io_success.append(False)
+                    break
+                io_success.append(True)
+            except ValueError:
+                io_success.append(True)
+        return all(io_success)
+
+    def test_time_taken_for_ls(self):
+        """
+        Test case:
+        1. Create a volume of type distributed-replicated or
+           distributed-arbiter or distributed-dispersed and start it.
+        2. Mount the volume to clients and create 2000 directories
+           and 10 files inside each directory.
+        3. Wait for I/O to complete on mount point and perform ls
+           (ls should complete within 10 seconds).
+        """
+        # Creating 2000 directories on the mount point
+        ret, _, _ = g.run(self.mounts[0].client_system,
+                          "cd %s; for i in {1..2000};do mkdir dir$i;done"
+                          % self.mounts[0].mountpoint)
+        self.assertFalse(ret, 'Failed to create 2000 dirs on mount point')
+
+        # Create 5000 files inside each directory
+        dirs = ('{1..100}', '{101..200}', '{201..300}', '{301..400}',
+                '{401..500}', '{501..600}', '{601..700}', '{701..800}',
+                '{801..900}', '{901..1000}', '{1001..1100}', '{1101..1200}',
+                '{1201..1300}', '{1301..1400}', '{1401..1500}', '{1501..1600}',
+                '{1801..1900}', '{1901..2000}')
+        self.proc_list, counter = [], 0
+        while counter < 18:
+            for mount_obj in self.mounts:
+                ret = g.run_async(mount_obj.client_system,
+                                  "cd %s;for i in %s;do "
+                                  "touch dir$i/file{1..10};done"
+                                  % (mount_obj.mountpoint, dirs[counter]))
+                self.proc_list.append(ret)
+                counter += 1
+        self.is_io_running = True
+
+        # Check if I/O is successful or not
+        ret = self._validate_io()
+        self.assertTrue(ret, "Failed to create Files and dirs on mount point")
+        self.is_io_running = False
+        g.log.info("Successfully created files and dirs needed for the test")
+
+        # Run ls on mount point which should get completed within 10 seconds
+        ret, _, _ = g.run(self.mounts[0].client_system,
+                          "cd %s; timeout 10 ls"
+                          % self.mounts[0].mountpoint)
+        self.assertFalse(ret, '1s taking more than 10 seconds')
+        g.log.info("ls completed in under 10 seconds")