Storage Performance Development Kit (SPDK)提供了一组用于编写高性能、可伸缩、用户态存储应用程序的工具和库。它通过使用一些关键技术来实现高性能:

  • 将所有必需的驱动程序移至用户空间,这样就避免了系统调用,并允许从应用程序中进行零拷贝访问;
  • 轮询硬件任务的完成而不是依靠中断,这会降低总延迟和延迟抖动;
  • 避免在I/O路径中出现锁, 而是依赖消息传递。

SPDK的基础是用户态、轮询、异步、无锁 NVMe 驱动。这提供了从用户空间应用程序直接访问SSD的零拷贝、高度并行的访问。驱动程序被编写为带有一个公共头文件的C语言库。

SPDK进一步提供了一个完整的块堆栈,作为一个用户空间库,它执行许多与操作系统中的块堆栈相同的操作。这包括统一不同存储设备之间的接口、通过队列来处理内存不足或I/O挂起等情况以及逻辑卷管理。

最后,SPDK提供 NVMe-oF, iSCSI, 和 vhost。 在这些组件之上构建的服务器,能够通过网络或其他进程为磁盘提供服务。NVMe和iSCSI的标准Linux内核启动器与这些target交互, 以及与QEMU和虚拟主机进行交互。与其他实现相比,这些服务器的CPU效率可以提高一个数量级。这些target可以用作实现高性能存储目标的范例,也可以用作生产部署的基础。

SPDK v19.07.1: Maintenance Release

Sep 27, 2019 • Tomasz Zawadzki

On behalf of the SPDK community I’m pleased to announce the release of SPDK 19.07.1!

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Presentations: SPDK, PMDK and Intel® VTune™ Amplifier PRC Summit on September 5-6, 2019

Sep 24, 2019 • Gang Cao

Thank you all for attending the SPDK, PMDK and Intel® VTune™ Amplifier PRC Summit. We had a very successful summit this year with awesome content and presenters. You can download the presentations including opening, keynotes, technical sessions and hands on labs using the links below. Please note these are static PDFs, but many of the presentations made extensive use of animations, so something may be lost in translation.

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Announcing the 2019 SPDK Developer Meetup Hosted by Nutanix

Sep 6, 2019 • Paul Luse

Come and join the 3rd annual SPDK Developer Meet-up, this year hosted by Nutanix in beautiful San Jose, CA! It’s an excellent opportunity for networking, learning, coding, and generally strengthening the community. We’ll be covering all sorts of topics so there’s sure to be something for everyone!

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