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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 threading, time
from helper import simulate_crash_restart
from test_rollback_to_stable01 import test_rollback_to_stable_base
from wiredtiger import stat
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
from wtthread import checkpoint_thread
# test_rollback_to_stable26.py
# Test the rollback to stable does properly restore the prepare rollback entry
# from the history store.
class test_rollback_to_stable26(test_rollback_to_stable_base):
format_values = [
('column', dict(key_format='r', value_format='S')),
('column_fix', dict(key_format='r', value_format='8t')),
('row_integer', dict(key_format='i', value_format='S')),
]
hs_remove_values = [
('no_hs_remove', dict(hs_remove=False)),
('hs_remove', dict(hs_remove=True))
]
prepare_values = [
('no_prepare', dict(prepare=False)),
('prepare', dict(prepare=True))
]
prepare_remove_values = [
('no_prepare_remove', dict(prepare_remove=False)),
('prepare_remove', dict(prepare_remove=True))
]
scenarios = make_scenarios(format_values, hs_remove_values, prepare_values, prepare_remove_values)
def conn_config(self):
config = 'cache_size=10MB,statistics=(all),timing_stress_for_test=[history_store_checkpoint_delay]'
return config
def evict_cursor(self, uri, nrows):
# Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
self.session.begin_transaction("ignore_prepare=true")
for i in range (1, nrows + 1):
evict_cursor.set_key(i)
evict_cursor.search()
evict_cursor.reset()
evict_cursor.close()
self.session.rollback_transaction()
def test_rollback_to_stable(self):
nrows = 10
# Create a table.
uri = "table:rollback_to_stable26"
ds = SimpleDataSet(self, uri, 0, key_format=self.key_format, value_format=self.value_format)
ds.populate()
if self.value_format == '8t':
value_a = 97
value_b = 98
value_c = 99
value_d = 100
value_e = 101
else:
value_a = "aaaaa" * 100
value_b = "bbbbb" * 100
value_c = "ccccc" * 100
value_d = "ddddd" * 100
value_e = "eeeee" * 100
# Pin oldest and stable to timestamp 10.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
',stable_timestamp=' + self.timestamp_str(10))
self.large_updates(uri, value_a, ds, nrows, self.prepare, 20)
self.large_updates(uri, value_b, ds, nrows, self.prepare, 30)
if self.hs_remove:
self.large_removes(uri, ds, nrows, self.prepare, 40)
prepare_session = self.conn.open_session()
prepare_session.begin_transaction()
cursor = prepare_session.open_cursor(uri)
for i in range (1, nrows + 1):
cursor[i] = value_c
if self.prepare_remove:
cursor.set_key(i)
self.assertEqual(cursor.remove(), 0)
cursor.close()
prepare_session.prepare_transaction('prepare_timestamp=' + self.timestamp_str(50))
# Verify data is visible and correct.
self.check(value_a, uri, nrows, None, 21 if self.prepare else 20)
self.check(value_b, uri, nrows, None, 31 if self.prepare else 30)
self.evict_cursor(uri, nrows)
# Pin stable to timestamp 40.
self.conn.set_timestamp('stable_timestamp=' + self.timestamp_str(40))
# Create a checkpoint thread
done = threading.Event()
ckpt = checkpoint_thread(self.conn, done)
try:
ckpt.start()
# Wait for checkpoint to start before committing last transaction.
ckpt_started = 0
while not ckpt_started:
stat_cursor = self.session.open_cursor('statistics:', None, None)
ckpt_started = stat_cursor[stat.conn.txn_checkpoint_running][2]
stat_cursor.close()
time.sleep(1)
prepare_session.rollback_transaction()
finally:
done.set()
ckpt.join()
self.large_updates(uri, value_d, ds, nrows, self.prepare, 60)
# Check that the correct data.
self.check(value_a, uri, nrows, None, 21 if self.prepare else 20)
self.check(value_b, uri, nrows, None, 31 if self.prepare else 30)
self.check(value_d, uri, nrows, None, 61 if self.prepare else 60)
# Simulate a server crash and restart.
simulate_crash_restart(self, ".", "RESTART")
stat_cursor = self.session.open_cursor('statistics:', None, None)
hs_removed = stat_cursor[stat.conn.txn_rts_hs_removed][2]
hs_restore_updates = stat_cursor[stat.conn.txn_rts_hs_restore_updates][2]
keys_removed = stat_cursor[stat.conn.txn_rts_keys_removed][2]
stat_cursor.close()
self.assertEqual(keys_removed, 0)
self.assertEqual(hs_restore_updates, nrows)
self.assertEqual(hs_removed, nrows)
# Check that the correct data.
self.check(value_a, uri, nrows, None, 21 if self.prepare else 20)
self.check(value_b, uri, nrows, None, 31 if self.prepare else 30)
self.large_updates(uri, value_e, ds, nrows, self.prepare, 70)
self.evict_cursor(uri, nrows)
# Check that the correct data.
self.check(value_a, uri, nrows, None, 21 if self.prepare else 20)
self.check(value_b, uri, nrows, None, 31 if self.prepare else 30)
self.check(value_e, uri, nrows, None, 71 if self.prepare else 70)
if __name__ == '__main__':
wttest.run()
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