Join us at the Third Annual U.S. Summit!

April 16-17, 2019
Dolce Hayes Mansion
200 Edenvale Ave, San Jose, CA 95136

Summit Registration
Agenda and Summit Overview

The Storage Performance Development Kit (SPDK) provides a set of tools and libraries for writing high performance, scalable, user-mode storage applications. It achieves high performance through the use of a number of key techniques:

  • Moving all of the necessary drivers into userspace, which avoids syscalls and enables zero-copy access from the application.
  • Polling hardware for completions instead of relying on interrupts, which lowers both total latency and latency variance.
  • Avoiding all locks in the I/O path, instead relying on message passing.

The bedrock of SPDK is a user space, polled-mode, asynchronous, lockless NVMe driver. This provides zero-copy, highly parallel access directly to an SSD from a user space application. The driver is written as a C library with a single public header.

SPDK further provides a full block stack as a user space library that performs many of the same operations as a block stack in an operating system. This includes unifying the interface between disparate storage devices, queueing to handle conditions such as out of memory or I/O hangs, and logical volume management.

Finally, SPDK provides NVMe-oF, iSCSI, and vhost servers built on top of these components that are capable of serving disks over the network or to other processes. The standard Linux kernel initiators for NVMe-oF and iSCSI interoperate with these targets, as well as QEMU with vhost. These servers can be up to an order of magnitude more CPU efficient than other implementations. These targets can be used as examples of how to implement a high performance storage target, or used as the basis for production deployments.

SPDK and OpenStack

Apr 10, 2019 • Maciej Szwed

The official OpenStack Stein release has been announced and for the first time it includes new SPDK Cinder target and volume drivers. This adds support for SPDK NVMe-oF target in OpenStack. Details about the OpenStack Cinder Block Storage service release can be found in the release notes and detailed documentation on drivers can be found in the SPDK Cinder drivers documentation.


19.01.1 SPDK NVMe-oF Performance Report

Apr 3, 2019 • Karol Latecki

Performance report for SPDK 19.01.1 NVMe-OF has been published in the Documentation section on SPDK 19.01.1 NVMe-oF Performance Report


SPDK v19.01.1: Maintenance Release

Mar 15, 2019 • Tomasz Zawadzki

On behalf of the SPDK community I’m pleased to announce the release of SPDK 19.01.1!