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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 wttest
from wtscenario import make_scenarios
'''
test_hs22.py
Test the following cases with out of order(OOO) timestamps:
- OOO update followed by a tombstone.
- Multiple OOO updates in a single transaction.
- Most recent OOO updates that require squashing.
'''
class test_hs22(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB'
format_values = [
('column', dict(key_format='r', key1=1, key2=2, value_format='S')),
('column-fix', dict(key_format='r', key1=1, key2=2, value_format='8t')),
('string-row', dict(key_format='S', key1=str(0), key2=str(1), value_format='S')),
]
scenarios = make_scenarios(format_values)
def test_onpage_out_of_order_timestamp_update(self):
uri = 'table:test_hs22'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
self.conn.set_timestamp(
'oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
key1 = self.key1
key2 = self.key2
if self.value_format == '8t':
value1 = 97 # 'a'
value2 = 98 # 'b'
else:
value1 = 'a'
value2 = 'b'
# Insert a key.
self.session.begin_transaction()
cursor[key1] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(10))
# Remove the key.
self.session.begin_transaction()
cursor.set_key(key1)
self.assertEqual(cursor.remove(), 0)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Do an out of order timestamp
# update and write it to the data
# store later.
self.session.begin_transaction()
cursor[key1] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(15))
# Insert another key.
self.session.begin_transaction()
cursor[key2] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Update the key.
self.session.begin_transaction()
cursor[key2] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(30))
# Do a checkpoint to trigger
# history store reconciliation.
self.session.checkpoint()
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search the key to evict it.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(15))
self.assertEqual(evict_cursor[key1], value2)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
# Search the key again to verify the data is still as expected.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(15))
self.assertEqual(cursor[key1], value2)
self.session.rollback_transaction()
def test_out_of_order_timestamp_update_newer_than_tombstone(self):
uri = 'table:test_hs22'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
self.conn.set_timestamp(
'oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
key1 = self.key1
key2 = self.key2
if self.value_format == '8t':
value1 = 97 # 'a'
value2 = 98 # 'b'
else:
value1 = 'a'
value2 = 'b'
# Insert a key.
self.session.begin_transaction()
cursor[key1] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(10))
# Remove a key.
self.session.begin_transaction()
cursor.set_key(key1)
self.assertEqual(cursor.remove(), 0)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Do an out of order timestamp
# update and write it to the
# history store later.
self.session.begin_transaction()
cursor[key1] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(15))
# Add another update.
self.session.begin_transaction()
cursor[key1] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Insert another key.
self.session.begin_transaction()
cursor[key2] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
# Update the key.
self.session.begin_transaction()
cursor[key2] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(30))
# Do a checkpoint to trigger
# history store reconciliation.
self.session.checkpoint()
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search the key to evict it.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(15))
self.assertEqual(evict_cursor[key1], value2)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
# Search the key again to verify the data is still as expected.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(15))
self.assertEqual(cursor[key1], value2)
self.session.rollback_transaction()
def test_out_of_order_timestamp_update_same_txn(self):
uri = 'table:test_hs22'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
self.conn.set_timestamp(
'oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
key1 = self.key1
if self.value_format == '8t':
value1 = 97 # 'a'
value2 = 98 # 'b'
value3 = 99 # 'c'
value4 = 100 # 'd'
else:
value1 = 'a'
value2 = 'b'
value3 = 'c'
value4 = 'd'
self.session.begin_transaction()
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(2))
cursor[key1] = value1
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(3))
cursor[key1] = value2
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(4))
cursor[key1] = value3
self.session.timestamp_transaction('commit_timestamp=' + self.timestamp_str(3))
cursor[key1] = value4
self.session.commit_transaction()
# Do a checkpoint to trigger
# history store reconciliation.
self.session.checkpoint()
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search the key to evict it.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(10))
self.assertEqual(evict_cursor[key1], value4)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
# Search the key again to verify the data is still as expected.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(10))
self.assertEqual(cursor[key1], value4)
self.session.rollback_transaction()
def test_out_of_order_timestamp_squash_updates(self):
uri = 'table:test_hs22'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
self.conn.set_timestamp(
'oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
key1 = self.key1
if self.value_format == '8t':
value1 = 97 # 'a'
value2 = 98 # 'b'
value3 = 99 # 'c'
value4 = 100 # 'd'
value5 = 101 # 'e'
else:
value1 = 'a'
value2 = 'b'
value3 = 'c'
value4 = 'd'
value5 = 'e'
self.session.begin_transaction()
cursor[key1] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(15))
self.session.begin_transaction()
cursor[key1] = value2
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(18))
self.session.begin_transaction()
cursor.set_key(key1)
cursor.remove()
cursor[key1] = value3
cursor[key1] = value4
cursor[key1] = value5
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(11))
# Do a checkpoint to trigger
# history store reconciliation.
self.session.checkpoint()
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search the key to evict it.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(18))
self.assertEqual(evict_cursor[key1], value5)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
# Search the key again to verify the data is still as expected.
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(18))
self.assertEqual(cursor[key1], value5)
self.session.rollback_transaction()
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