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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.
#
# test_timestamp19.py
# Use the oldest timestamp in the metadata as the oldest timestamp on restart.
import wiredtiger, wttest
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
class test_timestamp19(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB,log=(enabled)'
session_config = 'isolation=snapshot'
format_values = [
('integer-row', dict(key_format='i', value_format='S')),
('column', dict(key_format='r', value_format='S')),
('column-fix', dict(key_format='r', value_format='8t')),
]
scenarios = make_scenarios(format_values)
def updates(self, uri, value, ds, nrows, commit_ts):
session = self.session
cursor = session.open_cursor(uri)
for i in range(1, nrows + 1):
session.begin_transaction()
cursor[ds.key(i)] = value
session.commit_transaction('commit_timestamp=' + self.timestamp_str(commit_ts))
cursor.close()
def test_timestamp(self):
uri = "table:test_timestamp19"
create_params = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, create_params)
ds = SimpleDataSet(
self, uri, 0, key_format=self.key_format, value_format="S", config='log=(enabled=false)')
ds.populate()
nrows = 1000
if self.value_format == '8t':
value_x = 120 # 'x'
value_y = 121 # 'y'
value_z = 122 # 'z'
else:
value_x = 'x' * 1000
value_y = 'y' * 1000
value_z = 'z' * 1000
# Set the oldest and stable timestamps to 10.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
', stable_timestamp=' + self.timestamp_str(10))
# Insert values with varying timestamps.
self.updates(uri, value_x, ds, nrows, 20)
self.updates(uri, value_y, ds, nrows, 30)
self.updates(uri, value_z, ds, nrows, 40)
# Perform a checkpoint.
self.session.checkpoint('use_timestamp=true')
# Move the oldest and stable timestamps to 40.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(40) +
', stable_timestamp=' + self.timestamp_str(40))
# Update values.
self.updates(uri, value_z, ds, nrows, 50)
self.updates(uri, value_x, ds, nrows, 60)
self.updates(uri, value_y, ds, nrows, 70)
# Perform a checkpoint.
self.session.checkpoint('use_timestamp=true')
# Close and reopen the connection.
self.close_conn()
self.conn = self.setUpConnectionOpen('.')
self.session = self.setUpSessionOpen(self.conn)
# The oldest timestamp on recovery is 40. Trying to set it earlier is a no-op.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10))
self.assertTimestampsEqual(self.conn.query_timestamp('get=oldest'), self.timestamp_str(40))
# Move the oldest and stable timestamps to 70.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(70) +
', stable_timestamp=' + self.timestamp_str(70))
self.assertTimestampsEqual(self.conn.query_timestamp('get=oldest'), self.timestamp_str(70))
self.assertTimestampsEqual(self.conn.query_timestamp('get=stable'), self.timestamp_str(70))
if __name__ == '__main__':
wttest.run()
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