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#!/usr/bin/env python
#
# Public Domain 2014-2020 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.
from helper import copy_wiredtiger_home
import wiredtiger, wttest
def timestamp_str(t):
return '%x' %t
# test_durable_ts03.py
# Check that the checkpoint honors the durable timestamp of updates.
class test_durable_ts03(wttest.WiredTigerTestCase):
conn_config = 'cache_size=10MB'
session_config = 'isolation=snapshot'
def test_durable_ts03(self):
# Create a table.
uri = 'table:test_durable_ts03'
nrows = 3000
self.session.create(uri, 'key_format=i,value_format=u')
valueA = b"aaaaa" * 100
valueB = b"bbbbb" * 100
valueC = b"ccccc" * 100
# Start with setting a stable and oldest timestamp.
self.conn.set_timestamp('stable_timestamp=' + timestamp_str(1) + \
',oldest_timestamp=' + timestamp_str(1))
# Load the data into the table.
session = self.conn.open_session(self.session_config)
cursor = session.open_cursor(uri, None)
for i in range(0, nrows):
session.begin_transaction()
cursor[i] = valueA
session.commit_transaction('commit_timestamp=' + timestamp_str(50))
cursor.close()
# Set the stable and the oldest timestamp to checkpoint initial data.
self.conn.set_timestamp('stable_timestamp=' + timestamp_str(100) + \
',oldest_timestamp=' + timestamp_str(100))
self.session.checkpoint()
# Update all the values within transaction. Commit the transaction with
# a durable timestamp newer than the stable timestamp.
cursor = session.open_cursor(uri, None)
for i in range(0, nrows):
session.begin_transaction()
cursor[i] = valueB
session.prepare_transaction('prepare_timestamp=' + timestamp_str(150))
session.timestamp_transaction('commit_timestamp=' + timestamp_str(200))
session.timestamp_transaction('durable_timestamp=' + timestamp_str(220))
session.commit_transaction()
# Check the checkpoint wrote only the durable updates.
cursor2 = self.session.open_cursor(
uri, None, 'checkpoint=WiredTigerCheckpoint')
for key, value in cursor2:
self.assertEqual(value, valueA)
self.assertEquals(cursor.reset(), 0)
session.begin_transaction('read_timestamp=' + timestamp_str(150))
for key, value in cursor:
self.assertEqual(value, valueA)
session.commit_transaction()
# Read the updated data to confirm that it is visible.
self.assertEquals(cursor.reset(), 0)
session.begin_transaction('read_timestamp=' + timestamp_str(210))
for key, value in cursor:
self.assertEqual(value, valueB)
session.commit_transaction()
self.session.checkpoint("use_timestamp=true")
cursor.close()
session.close()
self.reopen_conn()
session = self.conn.open_session(self.session_config)
cursor = session.open_cursor(uri, None)
self.conn.set_timestamp('stable_timestamp=' + timestamp_str(210) + \
',oldest_timestamp=' + timestamp_str(210))
for key, value in cursor:
self.assertEqual(value, valueA)
self.assertEquals(cursor.reset(), 0)
for i in range(0, nrows):
session.begin_transaction()
cursor[i] = valueC
session.prepare_transaction('prepare_timestamp=' + timestamp_str(220))
session.timestamp_transaction('commit_timestamp=' + timestamp_str(230))
session.timestamp_transaction('durable_timestamp=' + timestamp_str(240))
session.commit_transaction()
self.conn.set_timestamp('stable_timestamp=' + timestamp_str(250))
self.session.checkpoint()
cursor.close()
session.close()
self.reopen_conn()
session = self.conn.open_session(self.session_config)
cursor = session.open_cursor(uri, None)
self.conn.set_timestamp('stable_timestamp=' + timestamp_str(250) + \
',oldest_timestamp=' + timestamp_str(250))
for key, value in cursor:
self.assertEqual(value, valueC)
if __name__ == '__main__':
wttest.run()
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