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There is no need for any history store values for non-timestamped tables when there are no old running transactions in parallel as the newer transactions can see the newer data that is visible in the data store. So clean the history store for the non-timestamped tables whenever rollback to stable is called.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| #!/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 test_rollback_to_stable01 import test_rollback_to_stable_base | ||
|
|
||
| def timestamp_str(t): | ||
| return '%x' % t | ||
|
|
||
| # test_rollback_to_stable05.py | ||
| # Test that rollback to stable cleans history store for non-timestamp tables. | ||
| class test_rollback_to_stable05(test_rollback_to_stable_base): | ||
| # Force a small cache. | ||
| conn_config = 'cache_size=50MB,log=(enabled),statistics=(all)' | ||
| session_config = 'isolation=snapshot' | ||
|
|
||
| def test_rollback_to_stable(self): | ||
| nrows = 5000 | ||
|
|
||
| # Create two tables without logging. | ||
| uri_1 = "table:rollback_to_stable05_1" | ||
| ds_1 = SimpleDataSet( | ||
| self, uri_1, 0, key_format="i", value_format="S", config='log=(enabled=false)') | ||
| ds_1.populate() | ||
|
|
||
| uri_2 = "table:rollback_to_stable05_2" | ||
| ds_2 = SimpleDataSet( | ||
| self, uri_2, 0, key_format="i", value_format="S", config='log=(enabled=false)') | ||
| ds_2.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 | ||
| valued = "ddddd" * 100 | ||
| self.large_updates(uri_1, valuea, ds_1, nrows, 0) | ||
| self.check(valuea, uri_1, nrows, 0) | ||
|
|
||
| self.large_updates(uri_2, valuea, ds_2, nrows, 0) | ||
| self.check(valuea, uri_2, nrows, 0) | ||
|
|
||
| # Start a long running transaction and keep it open. | ||
| session_2 = self.conn.open_session() | ||
| session_2.begin_transaction('isolation=snapshot') | ||
|
|
||
| self.large_updates(uri_1, valueb, ds_1, nrows, 0) | ||
| self.check(valueb, uri_1, nrows, 0) | ||
|
|
||
| self.large_updates(uri_1, valuec, ds_1, nrows, 0) | ||
| self.check(valuec, uri_1, nrows, 0) | ||
|
|
||
| self.large_updates(uri_1, valued, ds_1, nrows, 0) | ||
| self.check(valued, uri_1, nrows, 0) | ||
|
|
||
| # Add updates to the another table. | ||
| self.large_updates(uri_2, valueb, ds_2, nrows, 0) | ||
| self.check(valueb, uri_2, nrows, 0) | ||
|
|
||
| self.large_updates(uri_2, valuec, ds_2, nrows, 0) | ||
| self.check(valuec, uri_2, nrows, 0) | ||
|
|
||
| self.large_updates(uri_2, valued, ds_2, nrows, 0) | ||
| self.check(valued, uri_2, nrows, 0) | ||
|
|
||
| # Pin stable to timestamp 10. | ||
| self.conn.set_timestamp('stable_timestamp=' + timestamp_str(10)) | ||
|
|
||
| # Checkpoint to ensure that all the data is flushed. | ||
| self.session.checkpoint() | ||
|
|
||
| # Clear all running transactions before rollback to stable. | ||
| session_2.commit_transaction() | ||
| session_2.close() | ||
|
|
||
| self.conn.rollback_to_stable() | ||
| self.check(valued, uri_1, nrows, 0) | ||
| self.check(valued, uri_2, nrows, 0) | ||
|
|
||
| stat_cursor = self.session.open_cursor('statistics:', None, None) | ||
| calls = stat_cursor[stat.conn.txn_rts][2] | ||
| upd_aborted = (stat_cursor[stat.conn.txn_rts_upd_aborted][2] + | ||
| 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] | ||
| stat_cursor.close() | ||
|
|
||
| self.assertEqual(calls, 1) | ||
| self.assertEqual(keys_removed, 0) | ||
| self.assertEqual(keys_restored, 0) | ||
| self.assertEqual(pages_visited, 0) | ||
| self.assertGreaterEqual(upd_aborted, nrows * 3 * 2) | ||
|
|
||
| if __name__ == '__main__': | ||
| wttest.run() |