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+#!/usr/bin/env python
+#
+# Public Domain 2014-2015 MongoDB, Inc.
+# Public Domain 2008-2014 WiredTiger, Inc.
+#
+# This is free and unencumbered software released into the public domain.
+#
+# Anyone is free to copy, modify, publish, use, compile, sell, or
+# distribute this software, either in source code form or as a compiled
+# binary, for any purpose, commercial or non-commercial, and by any
+# means.
+#
+# In jurisdictions that recognize copyright laws, the author or authors
+# of this software dedicate any and all copyright interest in the
+# software to the public domain. We make this dedication for the benefit
+# of the public at large and to the detriment of our heirs and
+# successors. We intend this dedication to be an overt act of
+# relinquishment in perpetuity of all present and future rights to this
+# software under copyright law.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+# If unittest2 is available, use it in preference to (the old) unittest
+
+import os
+import shutil
+import wiredtiger, wttest
+from wttest import unittest
+from helper import key_populate, simple_populate
+
+# test_shared_cache02.py
+# Shared cache tests
+# Test shared cache shared amongst multiple connections.
+class test_shared_cache02(wttest.WiredTigerTestCase):
+
+ uri = 'table:test_shared_cache02'
+ # Setup fairly large items to use up cache
+ data_str = 'abcdefghijklmnopqrstuvwxyz' * 20
+
+ # Add a set of records
+ def add_records(self, session, start, stop):
+ cursor = session.open_cursor(self.uri, None, "overwrite")
+ for i in range(start, stop+1):
+ cursor.set_key("%010d KEY------" % i)
+ cursor.set_value("%010d VALUE "% i + self.data_str)
+ self.assertEqual(cursor.insert(), 0)
+ cursor.close()
+
+ # Disable default setup/shutdown steps - connections are managed manually.
+ def setUpSessionOpen(self, conn):
+ return None
+
+ def close_conn(self):
+ return None
+
+ def setUpConnectionOpen(self, dir):
+ return None
+
+ def openConnections(
+ self,
+ connections,
+ pool_opts = ',shared_cache=(name=pool,size=200M,chunk=10M,reserve=30M),',
+ extra_opts = '',
+ add=0):
+ if add == 0:
+ self.conns = []
+ self.sessions = []
+ # Open the set of connections.
+ for name in connections:
+ shutil.rmtree(name, True)
+ os.mkdir(name)
+ next_conn = wiredtiger.wiredtiger_open(
+ name,
+ 'create,error_prefix="' + self.shortid() + ': "' +
+ pool_opts + extra_opts)
+ self.conns.append(next_conn)
+ self.sessions.append(next_conn.open_session(None))
+ return None
+
+ def closeConnections(self):
+ for tmp_conn in self.conns:
+ tmp_conn.close()
+ self.conns = []
+ self.sessions = [] # Implicitly closed when closing sessions.
+
+ # Test reconfigure API
+ def test_shared_cache_reconfig01(self):
+ nops = 1000
+ self.openConnections(['WT_TEST1', 'WT_TEST2'])
+
+ for sess in self.sessions:
+ sess.create(self.uri, "key_format=S,value_format=S")
+ self.add_records(sess, 0, nops)
+
+ connection = self.conns[0]
+ connection.reconfigure("shared_cache=(name=pool,size=300M)")
+ self.closeConnections()
+
+ # Test reconfigure that grows the usage over quota fails
+ def test_shared_cache_reconfig02(self):
+ nops = 1000
+ self.openConnections(['WT_TEST1', 'WT_TEST2'],
+ pool_opts = ',shared_cache=(name=pool,size=50M,reserve=20M),')
+
+ for sess in self.sessions:
+ sess.create(self.uri, "key_format=S,value_format=S")
+ self.add_records(sess, 0, nops)
+
+ connection = self.conns[0]
+ # Reconfigure to over-subscribe, call should fail with an error
+ self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
+ lambda: connection.reconfigure("shared_cache=(name=pool,reserve=40M)"),
+ '/Shared cache unable to accommodate this configuration/')
+ # TODO: Ensure that the reserve size wasn't updated.
+ # cursor = self.sessions[0].open_cursor('config:', None, None)
+ # value = cursor['connection']
+ # self.assertTrue(value.find('reserve') != -1)
+
+ self.closeConnections()
+
+ # Test reconfigure that would grow the usage over quota if the
+ # previous reserve size isn't taken into account
+ def test_shared_cache_reconfig03(self):
+ nops = 1000
+ self.openConnections(['WT_TEST1', 'WT_TEST2'],
+ pool_opts = ',shared_cache=(name=pool,size=50M,reserve=20M),')
+
+ for sess in self.sessions:
+ sess.create(self.uri, "key_format=S,value_format=S")
+ self.add_records(sess, 0, nops)
+
+ connection = self.conns[0]
+
+ connection.reconfigure("shared_cache=(name=pool,reserve=30M)"),
+
+ # TODO: Ensure that the reserve size was updated.
+ # cursor = self.sessions[0].open_cursor('config:', None, None)
+ # value = cursor['connection']
+ # self.assertTrue(value.find('reserve') != -1)
+
+ self.closeConnections()
+
+ # Test reconfigure that switches to using a shared cache
+ # previous reserve size isn't taken into account
+ def test_shared_cache_reconfig03(self):
+ nops = 1000
+ self.openConnections(['WT_TEST1', 'WT_TEST2'], pool_opts = ',')
+
+ for sess in self.sessions:
+ sess.create(self.uri, "key_format=S,value_format=S")
+ self.add_records(sess, 0, nops)
+
+ self.conns[0].reconfigure("shared_cache=(name=pool,reserve=20M)"),
+ self.conns[1].reconfigure("shared_cache=(name=pool,reserve=20M)"),
+
+ # TODO: Ensure that the reserve size was updated.
+ # cursor = self.sessions[0].open_cursor('config:', None, None)
+ # value = cursor['connection']
+ # self.assertTrue(value.find('reserve') != -1)
+
+ self.closeConnections()
+
+if __name__ == '__main__':
+ wttest.run()