def test_power_generator(self):
ws = WorkloadSettings(items=10 ** 3, workers=40, working_set=10,
working_set_access=100, working_set_moving_docs=0,
key_fmtr='decimal')
keys = set()
for worker in range(ws.workers):
for key in docgen.SequentialKey(sid=worker, ws=ws, prefix='test'):
self.assertNotIn(key, keys)
keys.add(key.string)
self.assertEqual(len(keys), ws.items)
key_gen = docgen.PowerKey(prefix='test', fmtr=ws.key_fmtr, alpha=100)
for op in range(10 ** 4):
key = key_gen.next(curr_deletes=100, curr_items=ws.items)
self.assertIn(key.string, keys)
def test_power_generator_cache_miss(self):
num_ops = 10 ** 5
ws = WorkloadSettings(items=10 ** 5, workers=40, working_set=1.6,
working_set_access=90, working_set_moving_docs=0,
key_fmtr='hex')
hot_keys = set()
for worker in range(ws.workers):
for key in docgen.HotKey(sid=worker, ws=ws, prefix='test'):
hot_keys.add(key.string)
key_gen = docgen.PowerKey(prefix='test', fmtr=ws.key_fmtr, alpha=142)
misses = 0
for op in range(num_ops):
key = key_gen.next(curr_deletes=100, curr_items=ws.items)
if key.string not in hot_keys:
misses += 1
hit_rate = 100 * (1 - misses / num_ops)
self.assertAlmostEqual(hit_rate, ws.working_set_access, delta=0.5)