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#!/usr/bin/env python
#
# Public Domain 2014-2016 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.
import wiredtiger, wttest
from time import sleep
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
# test_inmem01.py
# Test in-memory configuration.
class test_inmem01(wttest.WiredTigerTestCase):
uri = 'table:inmem01'
conn_config = \
'cache_size=5MB,file_manager=(close_idle_time=0),in_memory=true'
table_config = ',memory_page_max=32k,leaf_page_max=4k'
scenarios = make_scenarios([
('col', dict(keyfmt='r', valuefmt='S')),
('fix', dict(keyfmt='r', valuefmt='8t')),
('row', dict(keyfmt='S', valuefmt='S')),
])
# Smoke-test in-memory configurations, add a small amount of data and
# ensure it's visible.
def test_insert(self):
ds = SimpleDataSet(self, self.uri, 1000, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
ds.populate()
ds.check()
# Add more data than fits into the configured cache and verify it fails.
def test_insert_over_capacity(self):
msg = '/WT_CACHE_FULL.*/'
ds = SimpleDataSet(self, self.uri, 10000000, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
self.assertRaisesHavingMessage(wiredtiger.WiredTigerError,
ds.populate, msg)
# Figure out the last key we successfully inserted, and check all
# previous inserts are still there.
cursor = self.session.open_cursor(self.uri, None)
cursor.prev()
last_key = int(cursor.get_key())
ds = SimpleDataSet(self, self.uri, last_key, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
ds.check()
# Fill the cache with data, remove some data, ensure more data can be
# inserted (after a reasonable amount of time for space to be reclaimed).
def test_insert_over_delete(self):
msg = '/WT_CACHE_FULL.*/'
ds = SimpleDataSet(self, self.uri, 10000000, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
self.assertRaisesHavingMessage(wiredtiger.WiredTigerError,
ds.populate, msg)
# Now that the database contains as much data as will fit into
# the configured cache, verify removes succeed.
cursor = self.session.open_cursor(self.uri, None)
for i in range(1, 100):
cursor.set_key(ds.key(i))
cursor.remove()
# Run queries after adding, removing and re-inserting data.
# Try out keeping a cursor open while adding new data.
def test_insert_over_delete_replace(self):
msg = '/WT_CACHE_FULL.*/'
ds = SimpleDataSet(self, self.uri, 10000000, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
self.assertRaisesHavingMessage(wiredtiger.WiredTigerError,
ds.populate, msg)
cursor = self.session.open_cursor(self.uri, None)
cursor.prev()
last_key = int(cursor.get_key())
# Now that the database contains as much data as will fit into
# the configured cache, verify removes succeed.
cursor = self.session.open_cursor(self.uri, None)
for i in range(1, last_key / 4, 1):
cursor.set_key(ds.key(i))
cursor.remove()
cursor.reset()
# Spin inserting to give eviction a chance to reclaim space
inserted = False
for i in range(1, 1000):
try:
cursor[ds.key(1)] = ds.value(1)
except wiredtiger.WiredTigerError:
cursor.reset()
sleep(1)
continue
inserted = True
break
self.assertTrue(inserted)
# Custom "keep filling" helper
def fill(self, cursor, ds, start, end):
for i in xrange(start + 1, end + 1):
cursor[ds.key(i)] = ds.value(i)
# Keep adding data to the cache until it becomes really full, make sure
# that reads aren't blocked.
@wttest.longtest("Try to wedge an in-memory cache")
def test_wedge(self):
# Try to really wedge the cache full
ds = SimpleDataSet(self, self.uri, 0, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
ds.populate()
cursor = self.session.open_cursor(self.uri, None)
run = 0
start, last_key = -1000, 0
while last_key - start > 100:
msg = '/WT_CACHE_FULL.*/'
start = last_key
self.assertRaisesHavingMessage(wiredtiger.WiredTigerError,
lambda: self.fill(cursor, ds, start, 10000000), msg)
cursor.reset()
sleep(1)
# Figure out the last key we successfully inserted, and check all
# previous inserts are still there.
cursor.prev()
last_key = int(cursor.get_key())
run += 1
self.pr('Finished iteration ' + str(run) + ', last_key = ' + str(last_key))
self.pr('Checking ' + str(last_key) + ' keys')
ds = SimpleDataSet(self, self.uri, last_key, key_format=self.keyfmt,
value_format=self.valuefmt, config=self.table_config)
# This test is *much* slower for fixed-length column stores: we fit
# many more records into the cache, so don't do as many passes through
# the data.
checks = 10 if self.valuefmt.endswith('t') else 100
for run in xrange(checks):
ds.check()
self.pr('Finished check ' + str(run))
sleep(1)
if __name__ == '__main__':
wttest.run()
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