#!/usr/bin/env python # # Public Domain 2014-2019 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 # 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["%010d KEY------" % i] = ("%010d VALUE " % i) + self.data_str 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 = self.wiredtiger_open( name, 'create,error_prefix="%s",' % 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() # Test reconfigure with absolute value for eviction config fails def test_shared_cache_reconfig04(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] # Reconfiguring with absolute value of eviction trigger should fail. self.assertRaisesWithMessage(wiredtiger.WiredTigerError, lambda: connection.reconfigure("shared_cache=(name=pool," "size=20M,reserve=10M),eviction_trigger=10M"),'/Shared cache ' 'configuration requires a percentage value for eviction trigger/') connection = self.conns[1] # Reconfiguring with absolute value for eviction target should fail. self.assertRaisesWithMessage(wiredtiger.WiredTigerError, lambda: connection.reconfigure("shared_cache=(name=pool," "size=20M,reserve=10M),eviction_target=10M"),'/Shared cache ' 'configuration requires a percentage value for eviction target/') # Reconfigure with percentage value for eviction target passes self.conns[0].reconfigure("shared_cache=(name=pool,reserve=20M)," "eviction_target=50") self.closeConnections() if __name__ == '__main__': wttest.run()