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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 wiredtiger import stat
from wtscenario import make_scenarios
# test_rollback_to_stable15.py
# Test that roll back to stable handles updates present in the
# update-list for both fixed length and variable length column store.
# Eviction is set to false, so that everything persists in memory.
class test_rollback_to_stable15(wttest.WiredTigerTestCase):
key_format_values = [
('column', dict(key_format='r')),
('integer-row', dict(key_format='i')),
]
value_format_values = [
# Fixed length
('fixed', dict(value_format='8t')),
# Variable length
('variable', dict(value_format='i')),
]
in_memory_values = [
('no_inmem', dict(in_memory=False)),
('inmem', dict(in_memory=True))
]
scenarios = make_scenarios(key_format_values, value_format_values, in_memory_values)
def conn_config(self):
config = 'cache_size=200MB,statistics=(all),debug_mode=(eviction=false)'
if self.in_memory:
config += ',in_memory=true'
return config
def check(self, check_value, uri, nrows, read_ts):
session = self.session
if read_ts == 0:
session.begin_transaction()
else:
session.begin_transaction('read_timestamp=' + self.timestamp_str(read_ts))
cursor = session.open_cursor(uri)
count = 0
for k, v in cursor:
self.assertEqual(v, check_value)
count += 1
session.commit_transaction()
cursor.close()
self.assertEqual(count, nrows)
def test_rollback_to_stable(self):
uri = "table:rollback_to_stable15"
nrows = 2000
# Create a table.
create_params = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
create_params += ',log=(enabled=false)' if self.in_memory else ''
self.session.create(uri, create_params)
cursor = self.session.open_cursor(uri)
# Pin oldest and stable to timestamp 1.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
value20 = 0x20
value30 = 0x30
value30 = 0x40
value40 = 0x50
#Insert value20 at timestamp 2
for i in range(1, nrows):
self.session.begin_transaction()
cursor[i] = value20
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(2))
#First Update to value 30 at timestamp 5
for i in range(1, nrows):
self.session.begin_transaction()
cursor[i] = value30
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(5))
cursor.close()
#Set stable timestamp to 2
self.conn.set_timestamp('stable_timestamp=' + self.timestamp_str(2))
self.conn.rollback_to_stable()
# Check that only value20 is available
self.check(value20, uri, nrows - 1, 2)
#Second Update to value30 at timestamp 7
cursor = self.session.open_cursor(uri)
for i in range(1, nrows):
self.session.begin_transaction()
cursor[i] = value30
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(7))
#Third Update to value40 at timestamp 9
for i in range(1, nrows):
self.session.begin_transaction()
cursor[i] = value40
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(9))
cursor.close()
#Set stable timestamp to 7
self.conn.set_timestamp('stable_timestamp=' + self.timestamp_str(7))
self.conn.rollback_to_stable()
#Check that only value30 is available
self.check(value30, uri, nrows - 1, 7)
stat_cursor = self.session.open_cursor('statistics:', None, None)
calls = stat_cursor[stat.conn.txn_rts][2]
upd_aborted = stat_cursor[stat.conn.txn_rts_upd_aborted][2]
stat_cursor.close()
self.assertEqual(upd_aborted, (nrows*2) - 2)
self.assertEqual(calls, 2)
self.session.close()
if __name__ == '__main__':
wttest.run()
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