• Publications
  • Influence
WiscKey: Separating Keys from Values in SSD-conscious Storage
TLDR
WiscKey is a persistent LSM-tree-based key-value store with a performance-oriented data layout that separates keys from values to minimize I/O amplification and is faster than both LevelDB and RocksDB in all six YCSB workloads. Expand
An analysis of data corruption in the storage stack
TLDR
This article presents the first large-scale study of data corruption, which analyzes corruption instances recorded in production storage systems containing a total of 1.53 million disk drives, over a period of 41 months. Expand
Serverless Computation with OpenLambda
We present OpenLambda, a new, open-source platform for building next-generation web services and applications in the burgeoningmodel of serverless computation. We describe the key aspects ofExpand
The interaction of parallel and sequential workloads on a network of workstations
TLDR
This paper examines the plausibility of using a network of workstations (NOW) for a mixture of parallel and sequential jobs, and presents a methodology for deriving an optimal delay time for recruiting idle machines for use by parallel programs. Expand
Slacker: Fast Distribution with Lazy Docker Containers
TLDR
A new container benchmark is developed, HelloBench, to evaluate the startup times of 57 different containerized applications, and the design of Slacker, a new Docker storage driver optimized for fast container startup are guided. Expand
IRON file systems
TLDR
It is shown that commodity file system failure policies are often inconsistent, sometimes buggy, and generally inadequate in their ability to recover from partial disk failures, so a new fail-partial failure model for disks is suggested, which incorporates realistic localized faults such as latent sector errors and block corruption. Expand
Analysis of HDFS under HBase: a facebook messages case study
TLDR
It is examined how layering causes write amplication when HBase is run on top of HDFS and how tighter integration could result in improved write performance, and whether it makes sense to include an SSD to improve performance while keeping costs in check. Expand
Operating Systems: Three Easy Pieces
OSTEP ("oh step"), or the "the comet book", represents the culmination of years of teaching intro to operating systems to both undergraduates and graduates at the University of Wisconsin-MadisonExpand
Geiger: monitoring the buffer cache in a virtual machine environment
TLDR
This paper creates a prototype implementation of techniques that can be used by a VMM to passively infer useful information about a guest operating system's unified buffer cache and virtual memory system, and implements a novel working set size estimator which allows the V MM to make more informed memory allocation decisions. Expand
Explicit Control in the Batch-Aware Distributed File System
We present the design, implementation, and evaluation of the Batch-Aware Distributed File System (BAD-FS), a system designed to orchestrate large, I/O-intensive batch workloads on remote computingExpand
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