官术网_书友最值得收藏!

Glance - Image registry

The Glance service provides a registry of images and metadata that the OpenStack user can launch as a virtual machine. Various image formats are supported and can be used based on the choice of hypervisor. Glance supports images for KVM/Qemu, XEN, VMware, Docker, and so on.

As a new user of OpenStack, one might often wonder, What is the difference between Glance and Swift? Both handle storage. What is the difference between them? Why do I need to integrate such a solution?

Swift is a storage system, whereas Glance is an image registry. The difference between the two is that Glance is a service that keeps track of virtual machine images and metadata associated with the images. Metadata can be information such as a kernel, disk images, disk format, and so on. Glance makes this information available to OpenStack users over REST APIs. Glance can use a variety of backends for storing images. The default is to use directories, but in a massive production environment it can use other approaches such as NFS and even Swift.

Swift, on the other hand, is a storage system. It is designed for object-storage where you can keep data such as virtual disks, images, backup archiving, and so on.

The mission of Glance is to be an image registry. From an architectural point of view, the goal of Glance is to focus on advanced ways to store and query image information via the Image Service API. A typical use case for Glance is to allow a client (which can be a user or an external service) to register a new virtual disk image, while a storage system focuses on providing a highly scalable and redundant data store. At this level, as a technical operator, your challenge is to provide the right storage solution to meet cost and performance requirements. This will be discussed at the end of the book.

主站蜘蛛池模板: 策勒县| 繁峙县| 美姑县| 广东省| 广昌县| 藁城市| 柘城县| 府谷县| 呼和浩特市| 泰兴市| 中山市| 镇原县| 兴隆县| 浮山县| 廊坊市| 金华市| 望奎县| 建水县| 隆林| 宽城| 闵行区| 板桥市| 新闻| 武夷山市| 房产| 陇南市| 延川县| 鹤庆县| 康马县| 施秉县| 阳信县| 盐源县| 威海市| 顺平县| 泰兴市| 二连浩特市| 久治县| 阿勒泰市| 浮山县| 肥城市| 中卫市|