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#!/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()
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