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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.
+
+import time
+from helper import copy_wiredtiger_home
+import unittest, wiredtiger, wttest
+from wtdataset import SimpleDataSet
+from wiredtiger import stat
+from wtscenario import make_scenarios
+from test_rollback_to_stable01 import test_rollback_to_stable_base
+
+def timestamp_str(t):
+ return '%x' % t
+
+# test_rollback_to_stable03.py
+# Test that rollback to stable clears the history store updates from reconciled pages.
+class test_rollback_to_stable01(test_rollback_to_stable_base):
+ session_config = 'isolation=snapshot'
+
+ in_memory_values = [
+ ('no_inmem', dict(in_memory=False)),
+ ('inmem', dict(in_memory=True))
+ ]
+
+ prepare_values = [
+ ('no_prepare', dict(prepare=False)),
+ ('prepare', dict(prepare=True))
+ ]
+
+ scenarios = make_scenarios(in_memory_values, prepare_values)
+
+ def conn_config(self):
+ config = 'cache_size=4GB,statistics=(all)'
+ if self.in_memory:
+ config += ',in_memory=true'
+ else:
+ config += ',log=(enabled),in_memory=false'
+ return config
+
+ def test_rollback_to_stable(self):
+ nrows = 1000
+
+ # Create a table without logging.
+ uri = "table:rollback_to_stable03"
+ ds = SimpleDataSet(
+ self, uri, 0, key_format="i", value_format="S", config='log=(enabled=false)')
+ ds.populate()
+
+ # Pin oldest and stable to timestamp 1.
+ self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(1) +
+ ',stable_timestamp=' + timestamp_str(1))
+
+ valuea = "aaaaa" * 100
+ valueb = "bbbbb" * 100
+ valuec = "ccccc" * 100
+ self.large_updates(uri, valuea, ds, nrows, 10)
+ # Check that all updates are seen.
+ self.check(valuea, uri, nrows, 10)
+
+ self.large_updates(uri, valueb, ds, nrows, 20)
+ # Check that all updates are seen.
+ self.check(valueb, uri, nrows, 20)
+
+ self.large_updates(uri, valuec, ds, nrows, 30)
+ # Check that all updates are seen.
+ self.check(valuec, uri, nrows, 30)
+
+ # Pin stable to timestamp 30 if prepare otherwise 20.
+ if self.prepare:
+ self.conn.set_timestamp('stable_timestamp=' + timestamp_str(30))
+ else:
+ self.conn.set_timestamp('stable_timestamp=' + timestamp_str(20))
+ # Checkpoint to ensure that all the updates are flushed to disk.
+ if not self.in_memory:
+ self.session.checkpoint()
+
+ self.conn.rollback_to_stable()
+ # Check that the old updates are only seen even with the update timestamp.
+ self.check(valueb, uri, nrows, 20)
+ self.check(valuea, uri, nrows, 10)
+
+ stat_cursor = self.session.open_cursor('statistics:', None, None)
+ calls = stat_cursor[stat.conn.txn_rts][2]
+ hs_removed = stat_cursor[stat.conn.txn_rts_hs_removed][2]
+ keys_removed = stat_cursor[stat.conn.txn_rts_keys_removed][2]
+ keys_restored = stat_cursor[stat.conn.txn_rts_keys_restored][2]
+ pages_visited = stat_cursor[stat.conn.txn_rts_pages_visited][2]
+ upd_aborted = stat_cursor[stat.conn.txn_rts_upd_aborted][2]
+ stat_cursor.close()
+
+ self.assertEqual(calls, 1)
+ self.assertEqual(keys_removed, 0)
+ self.assertEqual(keys_restored, 0)
+ if self.in_memory or self.prepare:
+ self.assertEqual(hs_removed, 0)
+ else:
+ self.assertEqual(hs_removed, nrows)
+ self.assertEqual(upd_aborted, nrows)
+ self.assertGreater(pages_visited, 0)
+
+if __name__ == '__main__':
+ wttest.run()