August 2019
Beginner to intermediate
232 pages
3h 50m
Chinese
Content preview from Web容量规划之美
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
167
第6 章
自动扩缩容
第
5
章我们讨论了在物理数据中心安装硬件并部署到生产环境中的步骤，众所周
知，使用公共云不需要这些步骤。此外使用公有云还避免了基础设施维护的需求，
从而促进产品开发的灵活性。这在竞争日益激烈的行业环境中是至关重要的。例
如
2008
年
NetFlix
开始将物理数据中心的服务迁移至亚马逊网络服务（
AWS
），
而在
2016
年
2
月，亚马逊宣布它们的流媒体服务已经完全迁移至云服务。
注
1
迁
移到云服务避免了花在硬件采购的时间成本和数据中心的维护成本，并提高了程
序开发的敏捷性。
大规模使用云服务要比使用物理数据中心的成本高很多。这就要求开发技术能够
尽量减少与公有云相关联的成本开销而不牺牲公有云的好处，如弹性。自动扩缩
容允许系统在需要的时候自动扩容，在不需要的时候自动缩容。企业可以在一个
给定的地理区域设置所需的最小容量跨可用区域（
AZ
）以保证快速访问指定的物
理区域。通过提供指定成本的最佳可用性和性能有助于节约成本。购买冗余容量
的成本可以由非高峰时期的非关键性任务调度和批量服务来分摊。
注意
这一部分的讨论基于
Arun
在
Netflix
的经验
。
注
1
：“
Completing the Netflix Cloud Migration.
”
(2016)
https://media.netflix.com/en/company-
blog/completing-the-netflix-cloud-migration
。
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.