tests: performance testing

Tests speed of activation and deactivation of a lot of volumes.
Currently limited to 1000LVs
TODO: explore why lvmetad fails with higher number.

test/shell/vgchange-many.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+# Copyright (C) 2013 Red Hat, Inc. All rights reserved.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+# Check perfomance of activation and deactivation
+. lib/test
+
+# FIXME: lvmetad fails with i.e. 1500 device on memory failure...
+
+# Number of LVs to create
+DEVICES=1000
+
+aux prepare_pvs 1 400
+
+vgcreate -s 128K $vg $(cat DEVICES)
+
+vgcfgbackup -f data $vg
+
+# Generate a lot of devices (size of 1 extent)
+awk -v DEVICES=$DEVICES '/^\t\}/ { \
+    printf("\t}\n\tlogical_volumes {\n");\
+    cnt=0;
+    for (i = 0; i < DEVICES; i++) { \
+	printf("\t\tlvol%06d  {\n", i);\
+	printf("\t\t\tid = \"%06d-1111-2222-3333-2222-1111-%06d\"\n", i, i); \
+	print "\t\t\tstatus = [\"READ\", \"WRITE\", \"VISIBLE\"]"; \
+	print "\t\t\tsegment_count = 1"; \
+	print "\t\t\tsegment1 {"; \
+	print "\t\t\t\tstart_extent = 0"; \
+	print "\t\t\t\textent_count = 1"; \
+	print "\t\t\t\ttype = \"striped\""; \
+	print "\t\t\t\tstripe_count = 1"; \
+	print "\t\t\t\tstripes = ["; \
+	print "\t\t\t\t\t\"pv0\", " cnt++; \
+	printf("\t\t\t\t]\n\t\t\t}\n\t\t}\n"); \
+      } \
+  }
+  {print}
+' data >data_new
+
+vgcfgrestore -f data_new $vg
+
+# Activate and deactivate all of them
+vgchange -ay $vg
+vgchange -an $vg