Practical Cache Design

The cache is a critical component of most storage systems. Most research on cache replacement algorithms has focused entirely on hit ratio. However, when designing practical storage systems, we often need to consider several other factors such as memory consumption, simplicity, and concurrency. In this talk, I will present some replacement algorithms designed for several real systems including Apple Fusion Drive, vSAN checksum cache, and the VDFS file metadata cache.

Dr. Wenguang Wang is a senior staff engineer in the vSAN team of VMware. He shipped features on vSAN such as checksum, data-at-rest encryption, and file services. Before joining VMware, Wenguang worked in Apple and shipped features such as UDF, File Vault 2, and Fusion Drive. He has more than 50 patents in software design and algorithms and holds a Ph.D. in Computer Science.