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。

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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Announcing The PRC SPDK Summit!

Aug 28, 2019 • Gang Cao

Save The Date

2019 Storage Performance Development Kit (SPDK) PRC Summit
September 5th-6th
Crowne Plaza Zhongguancun, Beijing
No.106 Zhichun Road, Haidian District, Beijing
Crowne Plaza Zhongguancun

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New Core Maintainer - Tomek Zawadzki

Aug 27, 2019 • Jim Harris

The SPDK project has a team of core maintainers who are responsible for providing technical oversight for the SPDK project, including final review and merging of patches into the SPDK code base. As the SPDK project continues to grow, the core maintainer team also needs to grow by adding contributors who are already demonstrating technical skill and leadership within the project. So I am pleased to announce that we are adding Tomasz (Tomek) Zawadzki to the core maintainer team!

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