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Home » SLIK: Scalable Low-Latency Indexes for a Key-Value Store
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SLIK: Scalable Low-Latency Indexes for a Key-Value Store

Authors: 

Ankita Kejriwal, Arjun Gopalan, Ashish Gupta, Zhihao Jia, Stephen Yang, and John Ousterhout, Stanford University

Abstract: 

Many large-scale key-value storage systems sacrifice features like secondary indexing and/or consistency in favor of scalability or performance. This limits the ease and efficiency of application development on such systems. Implementing secondary indexing in a large-scale memory based system is challenging because the goals for low latency, high scalability, consistency and high availability often conflict with each other. This paper shows how a large-scale key-value storage system can be extended to provide secondary indexes while meeting those goals. The architecture, called SLIK, enables multiple secondary indexes for each table. SLIK represents index B+ trees using objects in the underlying key-value store. It allows indexes to be partitioned and distributed independently of the data in tables while providing reasonable consistency guarantees using a lightweight ordered write approach. Our implementation of this design on RAMCloud (a main memory key-value store) performs indexed reads in 11 μs and writes in 30 μs. The architecture supports indexes spanning thousands of nodes, and provides linear scalability for throughput.

Ankita Kejriwal, Stanford University

Arjun Gopalan, Stanford University

Ashish Gupta, Stanford University

Zhihao Jia, Stanford University

Stephen Yang, Stanford University

John Ousterhout, Stanford University

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BibTeX
@inproceedings {196190,
author = {Ankita Kejriwal and Arjun Gopalan and Ashish Gupta and Zhihao Jia and Stephen Yang and John Ousterhout},
title = {{SLIK}: Scalable {Low-Latency} Indexes for a {Key-Value} Store},
booktitle = {2016 USENIX Annual Technical Conference (USENIX ATC 16)},
year = {2016},
isbn = {978-1-931971-30-0},
address = {Denver, CO},
pages = {57--70},
url = {https://www.usenix.org/conference/atc16/technical-sessions/presentation/kejriwal},
publisher = {USENIX Association},
month = jun
}
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atc16_paper-kejriwal.pdf
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