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Diffstat (limited to 'src/third_party/wiredtiger/test/suite/test_truncate03.py')
| -rw-r--r-- | src/third_party/wiredtiger/test/suite/test_truncate03.py | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/third_party/wiredtiger/test/suite/test_truncate03.py b/src/third_party/wiredtiger/test/suite/test_truncate03.py new file mode 100644 index 00000000000..85826841814 --- /dev/null +++ b/src/third_party/wiredtiger/test/suite/test_truncate03.py @@ -0,0 +1,140 @@ +#!/usr/bin/env python +# +# Public Domain 2014-2015 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_truncate03.py +# session level operations on tables + +import wiredtiger, wttest +from helper import key_populate, simple_populate, value_populate + +# A standalone test case that exercises address-deleted cells. +class test_truncate_address_deleted(wttest.WiredTigerTestCase): + uri = 'file:test_truncate' + + # Use a small page size and lots of keys because we want to create lots + # of individual pages in the file. + nentries = 10000 + config = 'allocation_size=512,' +\ + 'leaf_page_max=512,value_format=S,key_format=S' + + # address_deleted routine: + # Create an object that has a bunch of address-deleted cells on disk. + # Recover the object, and turn the address-deleted cells into free pages. + def address_deleted(self): + # Create the object, force it to disk, and verify the object. + simple_populate(self, self.uri, self.config, self.nentries) + self.reopen_conn() + self.session.verify(self.uri) + + # Create a new session and start a transaction to force the upcoming + # checkpoint operation to write address-deleted cells to disk. + tmp_session = self.conn.open_session(None) + tmp_session.begin_transaction("isolation=snapshot") + + # Truncate a big range of rows; the leaf pages aren't in memory, so + # leaf page references will be deleted without being read. + start = self.session.open_cursor(self.uri, None) + start.set_key(key_populate(start, 10)) + end = self.session.open_cursor(self.uri, None) + end.set_key(key_populate(end, self.nentries - 10)) + self.session.truncate(None, start, end, None) + self.assertEqual(start.close(), 0) + self.assertEqual(end.close(), 0) + + # Checkpoint, forcing address-deleted cells to be written. + self.session.checkpoint() + + # Crash/reopen the connection and verify the object. + self.reopen_conn() + self.session.verify(self.uri) + + # Open a cursor and update a record (to dirty the tree, else we won't + # mark pages with address-deleted cells dirty), then walk the tree so + # we get a good look at all the internal pages and the address-deleted + # cells. + cursor = self.session.open_cursor(self.uri, None) + cursor.set_key(key_populate(cursor, 5)) + cursor.set_value("changed value") + self.assertEqual(cursor.update(), 0) + cursor.reset() + for key,val in cursor: + continue + self.assertEqual(cursor.close(), 0) + + # Checkpoint, freeing the pages. + self.session.checkpoint() + + # Test object creation, recovery, and conversion of address-deleted cells + # into free pages. + def test_truncate_address_deleted_free(self): + # Create the object on disk. + self.address_deleted() + + # That's all just verify that worked. + self.session.verify(self.uri) + + # Test object creation, recovery, and conversion of address-deleted cells + # into free pages, but instead of verifying the final object, instantiate + # empty pages by a reader after the underlying leaf pages are removed. + def test_truncate_address_deleted_empty_page(self): + # Create the object on disk. + self.address_deleted() + + # Open a cursor and update pages in the middle of the range, forcing + # creation of empty pages (once the underlying leaf page is freed, we + # have to magic up a page if we need it). Confirm we can read/write + # the value as well as write the page and get it back. + cursor = self.session.open_cursor(self.uri, None) + for i in range(3000, 7000, 137): + k = key_populate(cursor, i) + v = 'changed value: ' + str(i) + cursor[k] = v + for i in range(3000, 7000, 137): + k = key_populate(cursor, i) + v = 'changed value: ' + str(i) + cursor.set_key(k) + self.assertEqual(cursor.search(), 0) + self.assertEqual(cursor.get_value(), v) + self.assertEqual(cursor.close(), 0) + + self.session.checkpoint() + self.reopen_conn() + self.session.verify(self.uri) + + cursor = self.session.open_cursor(self.uri, None) + for i in range(3000, 7000, 137): + k = key_populate(cursor, i) + v = 'changed value: ' + str(i) + cursor.set_key(k) + self.assertEqual(cursor.search(), 0) + self.assertEqual(cursor.get_value(), v) + self.assertEqual(cursor.close(), 0) + + +if __name__ == '__main__': + wttest.run() |