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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.
import wiredtiger, wttest
from wtscenario import make_scenarios
from wiredtiger import stat
# test_hs11.py
# Ensure that updates without timestamps clear the history store records.
class test_hs11(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB,statistics=(all)'
format_values = [
('column', dict(key_format='r', value_format='S')),
('column-fix', dict(key_format='r', value_format='8t')),
('integer-row', dict(key_format='i', value_format='S')),
('string-row', dict(key_format='S', value_format='S')),
]
update_type_values = [
('deletion', dict(update_type='deletion')),
('update', dict(update_type='update'))
]
scenarios = make_scenarios(format_values, update_type_values)
nrows = 10000
def create_key(self, i):
if self.key_format == 'S':
return str(i)
return i
def get_stat(self, stat):
stat_cursor = self.session.open_cursor('statistics:')
val = stat_cursor[stat][2]
stat_cursor.close()
return val
def test_non_ts_updates_clears_hs(self):
uri = 'table:test_hs11'
create_params = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, create_params)
if self.value_format == '8t':
value1 = 97
value2 = 98
else:
value1 = 'a' * 500
value2 = 'b' * 500
# Apply a series of updates from timestamps 1-4.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1))
cursor = self.session.open_cursor(uri)
for ts in range(1, 5):
for i in range(1, self.nrows):
self.session.begin_transaction()
cursor[self.create_key(i)] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(ts))
# Reconcile and flush versions 1-3 to the history store.
self.session.checkpoint()
# Apply an update without timestamp.
for i in range(1, self.nrows):
if i % 2 == 0:
if self.update_type == 'deletion':
cursor.set_key(self.create_key(i))
cursor.remove()
else:
cursor[self.create_key(i)] = value2
# Reconcile and remove the obsolete entries.
self.session.checkpoint()
# Now apply an update at timestamp 10.
for i in range(1, self.nrows):
self.session.begin_transaction()
cursor[self.create_key(i)] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(10))
# Ensure that we blew away history store content.
for ts in range(1, 5):
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(ts))
for i in range(1, self.nrows):
if i % 2 == 0:
if self.update_type == 'deletion':
cursor.set_key(self.create_key(i))
if self.value_format == '8t':
self.assertEqual(cursor.search(), 0)
self.assertEqual(cursor.get_value(), 0)
else:
self.assertEqual(cursor.search(), wiredtiger.WT_NOTFOUND)
else:
self.assertEqual(cursor[self.create_key(i)], value2)
else:
self.assertEqual(cursor[self.create_key(i)], value1)
self.session.rollback_transaction()
if self.update_type == 'deletion':
hs_truncate = self.get_stat(stat.conn.cache_hs_key_truncate_onpage_removal)
self.assertGreater(hs_truncate, 0)
def test_ts_updates_donot_clears_hs(self):
uri = 'table:test_hs11'
create_params = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, create_params)
if self.value_format == '8t':
value1 = 97
value2 = 98
else:
value1 = 'a' * 500
value2 = 'b' * 500
# Apply a series of updates from timestamps 1-4.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1))
cursor = self.session.open_cursor(uri)
for ts in range(1, 5):
for i in range(1, self.nrows):
self.session.begin_transaction()
cursor[self.create_key(i)] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(ts))
# Reconcile and flush versions 1-3 to the history store.
self.session.checkpoint()
# Remove the key with timestamp 10.
for i in range(1, self.nrows):
if i % 2 == 0:
self.session.begin_transaction()
cursor.set_key(self.create_key(i))
cursor.remove()
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(10))
# Reconcile and remove the obsolete entries.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10))
self.session.checkpoint()
# Now apply an update at timestamp 20.
for i in range(1, self.nrows):
self.session.begin_transaction()
cursor[self.create_key(i)] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Ensure that we didn't select old history store content even if it is not blew away.
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(10))
for i in range(1, self.nrows):
if i % 2 == 0:
cursor.set_key(self.create_key(i))
if self.value_format == '8t':
self.assertEqual(cursor.search(), 0)
self.assertEqual(cursor.get_value(), 0)
else:
self.assertEqual(cursor.search(), wiredtiger.WT_NOTFOUND)
else:
self.assertEqual(cursor[self.create_key(i)], value1)
self.session.rollback_transaction()
hs_truncate = self.get_stat(stat.conn.cache_hs_key_truncate_onpage_removal)
self.assertEqual(hs_truncate, 0)
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