| # coding:utf-8 | |
| import random | |
| def random_jitter(value): | |
| """Jitter the value a random number of milliseconds. | |
| This adds up to 1 second of additional time to the original value. | |
| Prior to backoff version 1.2 this was the default jitter behavior. | |
| Args: | |
| value: The unadulterated backoff value. | |
| """ | |
| return value + random.random() | |
| def full_jitter(value): | |
| """Jitter the value across the full range (0 to value). | |
| This corresponds to the "Full Jitter" algorithm specified in the | |
| AWS blog's post on the performance of various jitter algorithms. | |
| (http://www.awsarchitectureblog.com/2015/03/backoff.html) | |
| Args: | |
| value: The unadulterated backoff value. | |
| """ | |
| return random.uniform(0, value) | |