Unification of Temporary Storage in the NodeKernel Architecture

Authors: 

Patrick Stuedi, IBM Research; Animesh Trivedi, Vrije Universiteit; Jonas Pfefferle, IBM Research; Ana Klimovic, Stanford University; Adrian Schuepbach and Bernard Metzler, IBM Research

Abstract: 

Efficiently exchanging temporary data between tasks is critical to the end-to-end performance of many data processing frameworks and applications. Unfortunately, the diverse nature of temporary data creates storage demands that often fall between the sweet spots of traditional storage platforms, such as file systems or key-value stores.

We present NodeKernel, a novel distributed storage architecture that offers a convenient new point in the design space by fusing file system and key-value semantics in a common storage kernel while leveraging modern networking and storage hardware to achieve high performance and cost-efficiency. NodeKernel provides hierarchical naming, high scalability, and close to bare-metal performance for a wide range of data sizes and access patterns that are characteristic of temporary data. We show that storing temporary data in Crail, our concrete implementation of the NodeKernel architecture which uses RDMA networking with tiered DRAM/NVMe-Flash storage, improves NoSQL workload performance by up to 4.8× and Spark application performance by up to 3.4×. Furthermore, by storing data across NVMe Flash and DRAM storage tiers, Crail reduces storage cost by up to 8× compared to DRAM-only storage systems.

Open Access Media

USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.

BibTeX
@inproceedings {234976,
author = {Patrick Stuedi and Animesh Trivedi and Jonas Pfefferle and Ana Klimovic and Adrian Schuepbach and Bernard Metzler},
title = {Unification of Temporary Storage in the NodeKernel Architecture},
booktitle = {2019 {USENIX} Annual Technical Conference ({USENIX} {ATC} 19)},
year = {2019},
isbn = {978-1-939133-03-8},
address = {Renton, WA},
pages = {767--782},
url = {https://www.usenix.org/conference/atc19/presentation/stuedi},
publisher = {{USENIX} Association},
month = jul,
}

Presentation Video