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#!/usr/bin/env python
#
# Public Domain 2014-present 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.
#
# [TEST_TAGS]
# history_store:eviction_checkpoint_interaction
# [END_TAGS]
#
import wiredtiger, wttest
from wtscenario import make_scenarios
# test_hs15.py
# Ensure eviction doesn't clear the history store again after checkpoint has done so because of the same update without timestamp.
class test_hs15(wttest.WiredTigerTestCase):
conn_config = 'cache_size=5MB'
format_values = [
('column', dict(key_format='r', value_format='S')),
('column-fix', dict(key_format='r', value_format='8t')),
('string-row', dict(key_format='S', value_format='S'))
]
scenarios = make_scenarios(format_values)
def create_key(self, i):
if self.key_format == 'S':
return str(i)
return i
def test_hs15(self):
uri = 'table:test_hs15'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
if self.value_format == '8t':
value1 = 97
value2 = 98
value3 = 99
else:
value1 = 'a' * 500
value2 = 'b' * 500
value3 = 'c' * 500
# Insert an update without timestamp
self.session.begin_transaction()
cursor[self.create_key(1)] = value1
self.session.commit_transaction()
# Insert a bunch of other contents to trigger eviction
for i in range(2, 1000):
self.session.begin_transaction()
cursor[self.create_key(i)] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(3))
# Do a modify and an update with timestamps (for FLCS, just modifies)
self.session.begin_transaction()
cursor.set_key(self.create_key(1))
if self.value_format == '8t':
cursor.set_value(66)
self.assertEqual(cursor.update(), 0)
else:
mods = [wiredtiger.Modify('B', 100, 1)]
self.assertEqual(cursor.modify(mods), 0)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(1))
self.session.begin_transaction()
cursor[self.create_key(1)] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(2))
# Make the modify with timestamp and the update without timestamp obsolete
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1))
# Do a checkpoint
self.session.checkpoint()
self.session.begin_transaction()
cursor[self.create_key(1)] = value3
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(3))
# Insert a bunch of other contents to trigger eviction
for i in range(2, 1000):
self.session.begin_transaction()
cursor[self.create_key(i)] = value3
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(3))
if self.value_format == '8t':
expected = 66 # 'B'
else:
expected = list(value1)
expected[100] = 'B'
expected = str().join(expected)
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(1))
self.assertEqual(cursor[self.create_key(1)], expected)
self.session.rollback_transaction()
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(2))
self.assertEqual(cursor[self.create_key(1)], value2)
self.session.rollback_transaction()
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(3))
self.assertEqual(cursor[self.create_key(1)], value3)
self.session.rollback_transaction()
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