142 lines
5.8 KiB
Python
142 lines
5.8 KiB
Python
#!/usr/bin/env python
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#
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# Public Domain 2008-2014 WiredTiger, Inc.
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#
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#
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# test_truncate03.py
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# session level operations on tables
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import wiredtiger, wttest
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from helper import key_populate, simple_populate, value_populate
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# A standalone test case that exercises address-deleted cells.
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class test_truncate_address_deleted(wttest.WiredTigerTestCase):
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uri = 'file:test_truncate'
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# Use a small page size and lots of keys because we want to create lots
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# of individual pages in the file.
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nentries = 10000
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config = 'allocation_size=512,' +\
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'leaf_page_max=512,value_format=S,key_format=S'
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# address_deleted routine:
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# Create an object that has a bunch of address-deleted cells on disk.
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# Recover the object, and turn the address-deleted cells into free pages.
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def address_deleted(self):
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# Create the object, force it to disk, and verify the object.
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simple_populate(self, self.uri, self.config, self.nentries)
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self.reopen_conn()
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self.session.verify(self.uri)
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# Create a new session and start a transaction to force the upcoming
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# checkpoint operation to write address-deleted cells to disk.
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tmp_session = self.conn.open_session(None)
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tmp_session.begin_transaction("isolation=snapshot")
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# Truncate a big range of rows; the leaf pages aren't in memory, so
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# leaf page references will be deleted without being read.
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start = self.session.open_cursor(self.uri, None)
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start.set_key(key_populate(start, 10))
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end = self.session.open_cursor(self.uri, None)
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end.set_key(key_populate(end, self.nentries - 10))
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self.session.truncate(None, start, end, None)
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self.assertEqual(start.close(), 0)
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self.assertEqual(end.close(), 0)
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# Checkpoint, forcing address-deleted cells to be written.
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self.session.checkpoint()
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# Crash/reopen the connection and verify the object.
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self.reopen_conn()
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self.session.verify(self.uri)
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# Open a cursor and update a record (to dirty the tree, else we won't
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# mark pages with address-deleted cells dirty), then walk the tree so
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# we get a good look at all the internal pages and the address-deleted
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# cells.
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cursor = self.session.open_cursor(self.uri, None)
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cursor.set_key(key_populate(cursor, 5))
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cursor.set_value("changed value")
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self.assertEqual(cursor.update(), 0)
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cursor.reset()
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for key,val in cursor:
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continue
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self.assertEqual(cursor.close(), 0)
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# Checkpoint, freeing the pages.
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self.session.checkpoint()
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# Test object creation, recovery, and conversion of address-deleted cells
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# into free pages.
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def test_truncate_address_deleted_free(self):
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# Create the object on disk.
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self.address_deleted()
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# That's all just verify that worked.
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self.session.verify(self.uri)
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# Test object creation, recovery, and conversion of address-deleted cells
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# into free pages, but instead of verifying the final object, instantiate
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# empty pages by a reader the underlying leaf pages are removed.
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def test_truncate_address_deleted_empty_page(self):
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# Create the object on disk.
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self.address_deleted()
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# Open a cursor and update pages in the middle of the range, forcing
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# creation of empty pages (once the underlying leaf page is freed, we
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# have to magic up a page if we need it). Confirm we can read/write
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# the value as well as write the page and get it back.
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cursor = self.session.open_cursor(self.uri, None)
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for i in range(3000, 7000, 137):
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k = key_populate(cursor, i)
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v = 'changed value: ' + str(i)
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cursor.set_key(k)
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cursor.set_value(v)
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self.assertEqual(cursor.insert(), 0)
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for i in range(3000, 7000, 137):
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k = key_populate(cursor, i)
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v = 'changed value: ' + str(i)
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cursor.set_key(k)
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self.assertEqual(cursor.search(), 0)
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self.assertEqual(cursor.get_value(), v)
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self.assertEqual(cursor.close(), 0)
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self.session.checkpoint()
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self.reopen_conn()
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self.session.verify(self.uri)
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cursor = self.session.open_cursor(self.uri, None)
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for i in range(3000, 7000, 137):
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k = key_populate(cursor, i)
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v = 'changed value: ' + str(i)
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cursor.set_key(k)
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self.assertEqual(cursor.search(), 0)
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self.assertEqual(cursor.get_value(), v)
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self.assertEqual(cursor.close(), 0)
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if __name__ == '__main__':
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wttest.run()
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