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Monday, July 8 • 9:00am - 9:30am
Transaction Support using Compound Commands in Key-Value SSDs

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Recently proposed key-value SSD (KVSSD) provides the popular and versatile key-value interface at the device level, promising high performance and simplified storage management with the minimal involvement of the host software. However, its I/O command set over NVMe is defined on a per key-value pair basis, enforcing the host to post key-value operations to KVSSD independently. This not only incurs high interfacing overhead for small key-value operations but also makes it subtle to support transactions in KVSSDs without a software support.

In this paper, we propose compound commands for KVSSDs. The compound command allows the host to specify multiple key-value pairs in a single NVMe operation, thereby effectively amortizing I/O interfacing overhead. In addition, it provides an effective way for defining a transaction comprised of multiple key-value pairs. Our evaluation using a prototype KVSSD and an in-house KVSSD emulator shows promising benefits of the compound command, with improving the performance by up to 55%.


Sang-Hoon Kim

Ajou University

Jinhong Kim

Sungkyunkwan University

Kisik Jeong

Sungkyunkwan University

Jin-Soo Kim

Seoul National University

Monday July 8, 2019 9:00am - 9:30am PDT
HotStorage: Grand Ballroom I–III