def test_backoff_gap(self):
"""
Validates different node distances generated (to be passed into the StorageDriver)
"""
scenarios = {
1 * 1024**3: {
'backoff': int(1 * 1024**3 * 0.1),
'trigger': int(1 * 1024**3 * 0.08)
},
2 * 1024**4: {
'backoff': int(500 * 1024**3 *
0.1), # Upper limits based on 500GiB volume
'trigger': int(500 * 1024**3 * 0.08)
},
5: {
'backoff': 2,
'trigger': 1
},
None: {
'backoff': 2 * 1024**3, # Invalid size, return default
'trigger': 1 * 1024**3
}
}
for size, gap_config in scenarios.iteritems():
self.assertDictEqual(
StorageDriverController.generate_backoff_gap_settings(size),
gap_config)
