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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 os, shutil, threading, time
from wtthread import checkpoint_thread
from helper import simulate_crash_restart
import wiredtiger, wttest
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
from helper import copy_wiredtiger_home
from wiredtiger import stat
# test_checkpoint_snapshot06.py
# This test is to run checkpoint and truncate and insert followed by eviction
# for one table in parallel with timing stress for checkpoint and let eviction
# write more data than checkpoint.
class test_checkpoint_snapshot06(wttest.WiredTigerTestCase):
# Create two tables.
uri_1 = "table:test_checkpoint_snapshot06_1"
uri_2 = "table:test_checkpoint_snapshot06_2"
backup_dir = "BACKUP"
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')),
]
restart_values = [
("crash_restart", dict(restart=True)),
("backup", dict(restart=False)),
]
scenarios = make_scenarios(format_values, restart_values)
def conn_config(self):
config = 'cache_size=10MB,statistics=(all),statistics_log=(json,on_close,wait=1),log=(enabled=true),debug_mode=(log_retention=10),timing_stress_for_test=[checkpoint_slow]'
return config
def moresetup(self):
if self.value_format == '8t':
# Rig to use more than one page; otherwise the inconsistent checkpoint assertions fail.
self.extraconfig = ',leaf_page_max=4096'
self.nrows = 5000
self.valuea = 97
self.valueb = 98
else:
self.extraconfig = ''
self.nrows = 1000
self.valuea = "aaaaa" * 100
self.valueb = "bbbbb" * 100
def take_full_backup(self, fromdir, todir):
# Open up the backup cursor, and copy the files. Do a full backup.
cursor = self.session.open_cursor('backup:', None, None)
self.pr('Full backup from '+ fromdir + ' to ' + todir + ': ')
os.mkdir(todir)
while True:
ret = cursor.next()
if ret != 0:
break
bkup_file = cursor.get_key()
copy_file = os.path.join(fromdir, bkup_file)
sz = os.path.getsize(copy_file)
self.pr('Copy from: ' + bkup_file + ' (' + str(sz) + ') to ' + todir)
shutil.copy(copy_file, todir)
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
cursor.close()
def evict_cursor(self, uri, ds, 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(ds.key(i))
evict_cursor.search()
if i % 10 == 0:
evict_cursor.reset()
evict_cursor.close()
self.session.rollback_transaction()
def large_updates(self, uri, value, ds, nrows, commit_ts):
# Update a large number of records.
session = self.session
cursor = session.open_cursor(uri)
for i in range(1, nrows+1):
session.begin_transaction()
cursor[ds.key(i)] = value
if commit_ts == 0:
session.commit_transaction()
else:
session.commit_transaction('commit_timestamp=' + self.timestamp_str(commit_ts))
cursor.close()
def check(self, check_value, uri, nrows, read_ts, more_invisible_rows_exist):
# In FLCS the existence of the invisible extra set of rows causes the table to
# extend under them. Until that's fixed, expect (not just allow) those rows to
# exist and demand that they read back as zero and not as check_value. When it
# is fixed (so the end of the table updates transactionally) the special-case
# logic can just be removed.
flcs_tolerance = more_invisible_rows_exist and self.value_format == '8t'
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:
if flcs_tolerance and count >= nrows:
self.assertEqual(v, 0)
else:
self.assertEqual(v, check_value)
count += 1
session.commit_transaction()
self.assertEqual(count, nrows * 2 if flcs_tolerance else nrows)
def perform_backup_or_crash_restart(self, fromdir, todir):
if self.restart == True:
#Simulate a crash by copying to a new directory(RESTART).
copy_wiredtiger_home(self, fromdir, todir + ".copy", True)
simulate_crash_restart(self, fromdir, todir)
else:
#Take a backup and restore it.
self.take_full_backup(fromdir, todir)
self.take_full_backup(fromdir, todir + ".copy")
self.reopen_conn(todir)
def test_checkpoint_snapshot(self):
self.moresetup()
ds_1 = SimpleDataSet(self, self.uri_1, 0, \
key_format=self.key_format, value_format=self.value_format, \
config="log=(enabled=true)" +self.extraconfig)
ds_1.populate()
ds_2 = SimpleDataSet(self, self.uri_2, 0, \
key_format=self.key_format, value_format=self.value_format, \
config="log=(enabled=true)" + self.extraconfig)
ds_2.populate()
# Insert number of records into both tables.
self.large_updates(self.uri_1, self.valuea, ds_1, self.nrows, 0)
self.check(self.valuea, self.uri_1, self.nrows, 0, False)
self.large_updates(self.uri_2, self.valuea, ds_2, self.nrows, 0)
self.check(self.valuea, self.uri_2, self.nrows, 0, False)
# Remove one key from both the tables.
cursor1 = self.session.open_cursor(self.uri_1)
cursor2 = self.session.open_cursor(self.uri_2)
cursor1.set_key(ds_1.key(50))
cursor2.set_key(ds_2.key(50))
self.assertEqual(cursor1.remove(), 0)
self.assertEqual(cursor2.remove(), 0)
# Truncate the range from 1-100 in both tables where key 50 doesn't exist.
# We only set a stop cursor for both tables and send in an empty start
# cursor to truncate from the beginning of the table.
session1 = self.conn.open_session()
session1.begin_transaction()
cursor11 = session1.open_cursor(self.uri_1)
cursor12 = session1.open_cursor(self.uri_2)
cursor11.set_key(ds_1.key(100))
cursor12.set_key(ds_2.key(100))
session1.truncate(None, None, cursor11, None)
session1.truncate(None, None, cursor12, None)
# Insert the key 50 that was already removed.
session2 = self.conn.open_session()
session2.begin_transaction()
cursor21 = session2.open_cursor(self.uri_1)
cursor22 = session2.open_cursor(self.uri_2)
cursor21.set_key(ds_1.key(50))
cursor21.set_value(self.valueb)
cursor22.set_key(ds_2.key(50))
cursor22.set_value(self.valueb)
self.assertEqual(cursor21.insert(), 0)
self.assertEqual(cursor22.insert(), 0)
# Create a checkpoint thread
done = threading.Event()
ckpt = checkpoint_thread(self.conn, done)
try:
ckpt.start()
# Wait for checkpoint to start and acquire its snapshot before committing.
ckpt_snapshot = 0
while not ckpt_snapshot:
time.sleep(1)
stat_cursor = self.session.open_cursor('statistics:', None, None)
ckpt_snapshot = stat_cursor[stat.conn.txn_checkpoint_snapshot_acquired][2]
stat_cursor.close()
# commit the operations in out of order. Insert followed by truncate.
session2.commit_transaction()
session1.commit_transaction()
# Evict all the modifications of the table1 before checkpoint gets into the table.
self.evict_cursor(self.uri_1, ds_1, self.nrows)
finally:
done.set()
ckpt.join()
# Perform an additional checkpoint to ensure table2 also has the latest data.
self.session.checkpoint()
self.perform_backup_or_crash_restart(".", self.backup_dir)
# Check that the both tables contains the last re-inserted value.
cursor11 = self.session.open_cursor(self.uri_1)
cursor12 = self.session.open_cursor(self.uri_2)
cursor11.set_key(ds_1.key(50))
self.assertEqual(cursor11.search(), 0)
self.assertEqual(cursor11.get_value(), self.valueb)
cursor12.set_key(ds_2.key(50))
self.assertEqual(cursor12.search(), 0)
self.assertEqual(cursor12.get_value(), self.valueb)
if __name__ == '__main__':
wttest.run()
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