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fbda25f57a
Summary: In the current db_stress, all the keys are generated randomly and follows the uniform distribution. In order to test some corner cases that some key are always updated or read, we need to generate the key based on other distributions. In this PR, the key is generated based on Zipfian distribution and the skewness can be controlled by setting hot_key_alpha (0.8 to 1.5 is suggested). The larger hot_key_alpha is, the more skewed will be. Not that, usually, if hot_key_alpha is larger than 2, there might be only 1 or 2 keys that are generated. If hot_key_alpha is 0, it generate the key follows uniform distribution (random key) Testing plan: pass the db_stress and printed the keys to make sure it follows the distribution. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6163 Differential Revision: D18978480 Pulled By: zhichao-cao fbshipit-source-id: e123b4865477f7478e83fb581f9576bada334680 |
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| .. | ||
| batched_ops_stress.cc | ||
| cf_consistency_stress.cc | ||
| CMakeLists.txt | ||
| db_stress.cc | ||
| db_stress_common.cc | ||
| db_stress_common.h | ||
| db_stress_driver.cc | ||
| db_stress_driver.h | ||
| db_stress_gflags.cc | ||
| db_stress_listener.h | ||
| db_stress_shared_state.cc | ||
| db_stress_shared_state.h | ||
| db_stress_stat.h | ||
| db_stress_test_base.cc | ||
| db_stress_test_base.h | ||
| db_stress_tool.cc | ||
| no_batched_ops_stress.cc | ||