SCHEDULE: NOV 16-22, 2013

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Toward Millions of File System IOPS on Low-Cost Commodity Hardware

SESSION: IO Tuning

EVENT TYPE: Papers

TIME: 4:30PM - 5:00PM

SESSION CHAIR: André Brinkmann

AUTHOR(S):Da Zheng, Randal Burns, Alexander S. Szalay

ROOM:405/406/407

ABSTRACT:
We describe a storage system that removes I/O bottlenecks to achieve more than one million IOPS based on a user space file abstraction for arrays of commodity SSDs. The file abstraction refactors I/O scheduling and placement for extreme parallelism and non-uniform memory and I/O. The system includes a set-associative, parallel page cache in the user space. We redesign page caching to eliminate CPU overhead and lock-contention in non-uniform memory architecture machines. We evaluate our design on a 32 core NUMA machine with four, eight-core processors. Experiments show that our design delivers 1.23 million 512-byte read IOPS. The page cache realizes the scalable IOPS of Linux asynchronous I/O (AIO) and increases user-perceived I/O performance linearly with cache hit rates. The parallel, set-associative cache matches the cache hit rates of the global Linux page cache under real workloads.

Chair/Author Details:

André Brinkmann (Chair) - Johannes Gutenberg-University Mainz

Da Zheng - Johns Hopkins University

Randal Burns - Johns Hopkins University

Alexander S. Szalay - Johns Hopkins University

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The full paper can be found in the ACM Digital Library