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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 os, time
import wiredtiger, wttest
from wtdataset import SimpleDataSet, ComplexDataSet
from wtscenario import make_scenarios
# test_rebalance.py
# session level rebalance operation
class test_rebalance(wttest.WiredTigerTestCase):
name = 'test_rebalance'
# Use small pages so we generate some internal layout
# Setup LSM so multiple chunks are present
config = 'allocation_size=512,internal_page_max=512' + \
',leaf_page_max=1k,lsm=(chunk_size=512k,merge_min=10)'
scenarios = make_scenarios([
('file', dict(uri='file:')),
('table', dict(uri='table:')),
('lsm', dict(uri='lsm:'))
])
# Populate an object, then rebalance it.
def rebalance(self, dataset, with_cursor):
uri = self.uri + self.name
ds = dataset(self, uri, 10000, config=self.config)
ds.populate()
# Force to disk, we don't rebalance in-memory objects.
self.reopen_conn()
# Open cursors should cause failure.
if with_cursor:
cursor = self.session.open_cursor(uri, None, None)
self.assertRaises(wiredtiger.WiredTigerError,
lambda: self.session.rebalance(uri, None))
cursor.close()
self.session.rebalance(uri, None)
self.session.drop(uri)
# Test rebalance of an object.
def test_rebalance(self):
# Simple file or table object.
self.rebalance(SimpleDataSet, False)
self.rebalance(SimpleDataSet, True)
# A complex, multi-file table object.
if self.uri == "table:":
self.rebalance(ComplexDataSet, False)
self.rebalance(ComplexDataSet, True)
if __name__ == '__main__':
wttest.run()
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