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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 wiredtiger, wttest
from wtscenario import make_scenarios
from wtbound import bound_base
from wiredtiger import stat
# test_cursor_bound08.py
# Test that the statistics added for cursor bound API are appropiately incremented for all different cursor
# operations and edge cases.
class test_cursor_bound08(bound_base):
conn_config = 'statistics=(all)'
file_name = 'test_cursor_bound08'
value_format = 'S'
lower_inclusive = True
upper_inclusive = True
types = [
('file', dict(uri='file:', use_colgroup=False)),
('table', dict(uri='table:', use_colgroup=False)),
]
key_format_values = [
('string', dict(key_format='S')),
('var', dict(key_format='r')),
('int', dict(key_format='i')),
('bytes', dict(key_format='u')),
('composite_string', dict(key_format='SSS')),
('composite_int_string', dict(key_format='iS')),
('composite_complex', dict(key_format='iSru')),
]
evict = [
('inclusive-evict', dict(evict=True)),
('inclusive-no-evict', dict(evict=False)),
]
scenarios = make_scenarios(types, key_format_values, evict)
def create_session_and_cursor_timestamp(self):
nrows = 1000
uri = self.uri + self.file_name
create_params = 'value_format=S,key_format={}'.format(self.key_format)
self.session.create(uri, create_params)
cursor = self.session.open_cursor(uri)
self.session.begin_transaction()
for i in range(100, 301):
cursor[self.gen_key(i)] = "value" + str(i)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(100))
self.session.begin_transaction()
for i in range(301, 601):
cursor[self.gen_key(i)] = "value" + str(i)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(200))
self.session.begin_transaction()
for i in range(601, nrows + 1):
cursor[self.gen_key(i)] = "value" + str(i)
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(100))
if (self.evict):
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
for i in range(100, nrows + 1):
evict_cursor.set_key(self.gen_key(i))
evict_cursor.search()
evict_cursor.reset()
evict_cursor.close()
return cursor
def get_stat(self, stat):
stat_cursor = self.session.open_cursor('statistics:')
val = stat_cursor[stat][2]
stat_cursor.close()
return val
def test_bound_basic_stat_scenario(self):
cursor = self.create_session_and_cursor()
# Test bound api: Test that early exit stat gets incremented with a upper bound.
self.set_bounds(cursor, 50, "upper")
self.cursor_traversal_bound(cursor, None, 50, True)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_next_early_exit), 1)
# Test bound api: Test that early exit stat gets incremented with a lower bound.
self.set_bounds(cursor, 45, "lower")
self.cursor_traversal_bound(cursor, 45, None, False)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_prev_early_exit), 1)
# Test bound api: Test that cursor next unpositioned stat gets incremented with a lower bound.
self.set_bounds(cursor, 45, "lower")
self.cursor_traversal_bound(cursor, 45, None, True)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_next_unpositioned), 1)
# Test bound api: Test that cursor prev unpositioned stat gets incremented with an upper bound.
self.set_bounds(cursor, 50, "upper")
self.cursor_traversal_bound(cursor, None, 50, False)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_prev_unpositioned), 1)
# Test bound api: Test that both stats get incremented with both bounds set.
self.set_bounds(cursor, 45, "lower")
self.set_bounds(cursor, 50, "upper")
self.cursor_traversal_bound(cursor, 45, 50, True)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_next_early_exit), 2)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_next_unpositioned), 2)
self.set_bounds(cursor, 45, "lower")
self.set_bounds(cursor, 50, "upper")
self.cursor_traversal_bound(cursor, 45, 50, False)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_prev_early_exit), 2)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_prev_unpositioned), 2)
# Test bound api: Test that cursor bound reset stats get incremented when clearing bounds.
self.set_bounds(cursor, 45, "lower")
self.set_bounds(cursor, 50, "upper")
self.assertEqual(cursor.reset(), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_reset), 1)
# Test bound api: Test that cursor bound search early exit stats get incremented.
self.set_bounds(cursor, 40, "upper")
cursor.set_key(self.gen_key(60))
ret = cursor.search()
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_search_early_exit), 1)
self.set_bounds(cursor, 30, "lower")
cursor.set_key(self.gen_key(20))
ret = cursor.search()
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_search_early_exit), 2)
self.set_bounds(cursor, 30, "lower")
cursor.set_key(self.gen_key(20))
self.assertEqual(cursor.search_near(), 1)
self.assertEqual(cursor.get_key(), self.check_key(30))
self.assertEqual(cursor.reset(), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_search_near_repositioned_cursor), 1)
# Test bound api: Test that cursor bound search near reposition exit stats get incremented.
# This can only happen when the search key is out of the bound range.
self.set_bounds(cursor, 30, "lower")
cursor.set_key(self.gen_key(20))
self.assertEqual(cursor.search_near(), 1)
self.assertEqual(cursor.get_key(), self.check_key(30))
self.assertEqual(cursor.reset(), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_search_near_repositioned_cursor), 2)
self.set_bounds(cursor, 40, "upper")
cursor.set_key(self.gen_key(60))
self.assertEqual(cursor.search_near(), -1)
self.assertEqual(cursor.get_key(), self.check_key(40))
self.assertEqual(cursor.reset(), 0)
self.assertEqual(self.get_stat(stat.conn.cursor_bounds_search_near_repositioned_cursor), 3)
cursor.close()
def test_bound_perf_stat_scenario(self):
cursor = self.create_session_and_cursor_timestamp()
key_count = 900
# Make sure to run the test with no records visible.
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(50))
# Test bound api: Test that cursor bound search near traverses less entries perf on upper bounds.
cursor.set_key(self.gen_key(200))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
# This should be equal to roughly key_count * 2 as we're going to traverse the whole
# range forward, and then the whole range backwards.
self.assertGreater(skip_count, 2 * key_count - 200)
prev_skip_count = skip_count
self.set_bounds(cursor, 300, "upper")
cursor.set_key(self.gen_key(200))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertGreater(skip_count - prev_skip_count, 50 * 2)
# Test bound api: Test that cursor bound search near traverses less entries perf on lower bounds.
prev_skip_count = skip_count
cursor.set_key(self.gen_key(900))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
# This should be equal to roughly key_count * 2 as we're going to traverse the whole
# range forward, and then the whole range backwards.
self.assertGreater(skip_count - prev_skip_count, 2 * key_count - 900)
prev_skip_count = skip_count
self.set_bounds(cursor, 900, "lower")
cursor.set_key(self.gen_key(900))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertGreater(skip_count - prev_skip_count, 100)
# Test bound api: Test that cursor bound search near traverses less entries perf on both bounds.
prev_skip_count = skip_count
cursor.set_key(self.gen_key(750))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
# This should be equal to roughly key_count * 2 as we're going to traverse the whole
# range forward, and then the whole range backwards.
self.assertGreater(skip_count - prev_skip_count, 2 * key_count - 750)
prev_skip_count = skip_count
self.set_bounds(cursor, 600, "lower")
self.set_bounds(cursor, 900, "upper")
cursor.set_key(self.gen_key(750))
self.assertEqual(cursor.search_near(), wiredtiger.WT_NOTFOUND)
skip_count = self.get_stat(stat.conn.cursor_next_skip_total) + self.get_stat(stat.conn.cursor_prev_skip_total)
self.assertEqual(cursor.bound("action=clear"), 0)
self.assertGreater(skip_count - prev_skip_count, 150 * 2)
cursor.close()
if __name__ == '__main__':
wttest.run()
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