NDLI: Transparent Throughput Elasticity for IaaS Cloud Storage Using Guest-Side Block-Level Caching

Content Provider	IEEE Xplore Digital Library
Author	Nicolae, Bogdan Riteau, Pierre Keahey, Kate
Copyright Year	2014
Abstract	Storage elasticity on IaaS clouds is a crucial feature in the age of data-intensive computing. However, the traditional provisioning model of leveraging virtual disks of fixed capacity and performance characteristics has limited ability to match the increasingly dynamic nature of I/O application requirements. This mismatch is particularly problematic in the context of scientific applications that interleave periods of I/O inactivity with I/O intensive bursts. In this context, over-provisioning for best performance during peaks leads to significant extra costs because of unnecessarily tied-up resources, while any other trade-off leads to performance loss. This paper provides a transparent solution that automatically boosts I/O bandwidth during peaks for underlying virtual disks, effectively avoiding over-provisioning without performance loss. Our proposal relies on the idea of leveraging short lived virtual disks of better performance characteristics (and thus more expensive) to act during peaks as a caching layer for the persistent virtual disks where the application data is stored. We show how this idea can be achieved efficiently at the block-device level, using a caching mechanism that leverages iterative behavior and learns from past experience. We demonstrate the benefits of our proposal both for micro benchmarks and for two real life applications using large-scale experiments.
Starting Page	186
Ending Page	195
File Size	316829
Page Count	10
File Format	PDF
ISBN	9781479978816
DOI	10.1109/UCC.2014.27
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-12-08
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Context Performance evaluation Cloud computing Block-level caching Virtual machine monitors Virtual disk Bandwidth Elasticity Storage elasticity Throughput Adaptive I/O
Content Type	Text
Resource Type	Article

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