fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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haoyuhuang 70c7302fb5 Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610) ... Summary: This PR implements cache eviction using reinforcement learning. It includes two implementations: 1. An implementation of Thompson Sampling for the Bernoulli Bandit [1]. 2. An implementation of LinUCB with disjoint linear models [2]. The idea is that a cache uses multiple eviction policies, e.g., MRU, LRU, and LFU. The cache learns which eviction policy is the best and uses it upon a cache miss. Thompson Sampling is contextless and does not include any features. LinUCB includes features such as level, block type, caller, column family id to decide which eviction policy to use. [1] Daniel J. Russo, Benjamin Van Roy, Abbas Kazerouni, Ian Osband, and Zheng Wen. 2018. A Tutorial on Thompson Sampling. Found. Trends Mach. Learn. 11, 1 (July 2018), 1-96. DOI: https://doi.org/10.1561/2200000070 [2] Lihong Li, Wei Chu, John Langford, and Robert E. Schapire. 2010. A contextual-bandit approach to personalized news article recommendation. In Proceedings of the 19th international conference on World wide web (WWW '10). ACM, New York, NY, USA, 661-670. DOI=http://dx.doi.org/10.1145/1772690.1772758 Pull Request resolved: https://github.com/facebook/rocksdb/pull/5610 Differential Revision: D16435067 Pulled By: HaoyuHuang fbshipit-source-id: 6549239ae14115c01cb1e70548af9e46d8dc21bb		5 years ago
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__init__.py	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_pysim.py	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_pysim.sh	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_pysim_test.py	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_trace_analyzer.cc	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_trace_analyzer.h	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_trace_analyzer_plot.py	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_trace_analyzer_test.cc	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago
block_cache_trace_analyzer_tool.cc	Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610)	5 years ago