Yifan Qiao

WAL-assisted Tiering: Painlessly Improving Your Favorite Log-Structured KV Store Instead of Building a New One

2020

This paper presents a simple design approach that can be easily integrated into existing mature log-structured key-value (KV) stores (e.g., RocksDB) to mitigate the impact of background compaction. Reducing compaction-induced performance degradation has been widely …

A deep reinforcement learning model with plan value network for join order selection

2021 · International Journal of Wireless and Mobile Computing

The existing optimisers and dynamic programming methods rely on the cardinality estimation and the cost model of the local database. The resulting join plan does not reflect the execution time, and the errors of cardinality …

Mako: a low-pause, high-throughput evacuating collector for memory-disaggregated datacenters

2022

Resource disaggregation has gained much traction as an emerging datacenter architecture, as it improves resource utilization and simplifies hardware adoption. Under resource disaggregation, different types of resources (memory, CPUs, etc.) are disaggregated into dedicated servers …