Zone Append: A New Way of Writing to Zoned Storage

Monday, February 24, 2020 - 9:00 am9:30 am

Matias Bjørling, Western Digital, Inc.


The global hunger for more storage capacity requires us to rethink conventional storage interfaces that we use in today's storage infrastructures. The Zoned Namespaces (ZNS) SSD interface is a new standardized storage interface, which is being adopted by over 31% of the total cloud market. When compared to typical enterprise SSDs, ZNS SSDs get more than 20% additional capacity, require an order of magnitude less device DRAM while improving its tail latency (QoS). The Zoned Namespace interface defines sequential write required zones (similarly to ZAC/ZBC for SMR HDDs), which requires that host applications must write sequentially. This talk focuses on the newly introduced Zone Append I/O command, which enables a ZNS SSD to perform data placement within a given zone. The Zone Append command enables new ways to innovate in your storage system. Such as (1) writing directly from clients to ZNS SSDs when using a distributed file-system, (2) offload of fine-grained data placement to the SSD, and (3) eliminate single writer per zone bottleneck.

Matias Bjørling, Western Digital, Inc.

The explosive growth of data continues to grow year over year at a rate of 61% and is projected to reach 175 Zettabytes in 2025. The growth requires the industry to rethink how we store, access, and manages our data. Matias Bjørling, Ph.D., is hence on a path to shed conventional host interfaces, combine it with leading open-source ecosystems, and enable it to scale to our ever-increasing storage needs. Matias is one of the storage industry's leading storage architect and developer, widely recognized for his work on moving the industry to understand, use, and take advantage of Open-Channel SSD architectures. Matias is currently a Director of Emerging System Architectures at Western Digital, where he defines the next-generation storage interface to be adopted by more than 31% of the 38.9B total cloud market. It involves chairing the Zoned Namespaces (ZNS) SSDs technical proposal in the NVMe Working Group, engaging with internal and external adoptors, and leading a global team to enable the open-source ecosystem.

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@conference {246542,
author = {Matias Bj{\o}rling},
title = {Zone Append: A New Way of Writing to Zoned Storage},
year = {2020},
address = {Santa Clara, CA},
publisher = {USENIX Association},
month = feb