单个 EC2 弹性负载均衡器可以服务多少个节点
我正在计划一个 Web 部署，可能需要 50 多台服务器全部进行负载平衡。 RackSpace 云仅允许每个负载均衡器有 25 个节点，并且您无法链接负载均衡器。亚马逊似乎没有列出任何此类限制。
我的后备计划是使用 HXProxy，但我更愿意使用更容易设置的东西。
任何人都可以回答标题问题，或者提出替代架构吗？ （除了涉及较少节点的任何事情:)）
I'm planning a web deployment that could require 50+ servers all being load balanced. RackSpace cloud only allows 25 nodes per load balancer, and you can't chain the load balancers. Amazon doesn't appear to list any such limitations.
My fall-back plan is to use HXProxy, but I'd much rather use something easier to set up.
Can anyone answer the title question, or suggest an alternative architecture? (Other than anything that involves fewer nodes :) )
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在 EC2 上，您仅受帐户实例限制的限制。默认值为 20，但您可以在 http://aws.amazon 请求增加。 com/contact-us/ec2-request/。当我请求增加时，该请求在几天内获得批准。
如果您想坚持使用 Rackspace，您可以创建多个负载均衡器并使用循环 DNS 来扩展负载均衡器。
如果您切换到 Amazon ELB 并将服务器放置在多个区域中，则会自动为您处理扩展。
假设你至少使用 3 个区域，Amazon 会比 Rackspace 贵一点。但如果您有 50 个实例，负载均衡器服务的成本就不会是您最关心的问题。
On EC2 you are limited only by the instance limit on your account. The default is 20, but you can request an increase at http://aws.amazon.com/contact-us/ec2-request/. When I requested an increase, the request was granted in a couple days.
If you want to stick with Rackspace, you could create multiple load balancers and use round-robin DNS to scale the load balancers out.
If you switch to Amazon ELB and put your servers in multiple zones, the scale out is handled for you automatically.
Assuming you use at least 3 zones, Amazon will be a little more expensive than Rackspace. But if you have 50 instances, the cost of your load balancer service isn't going to be your biggest concern.
您也可以从机架空间请求更高的限制。只需向我们的一位支持人员表达您的担忧，他们就会照顾您。出于谨慎考虑，我们限制 25 个，并且认为 25 个对于普通使用来说是一个合理的数量。我们当然理解存在特殊情况，并将尽我们所能制定适合您的解决方案！
You can request a higher limit from rackspace as well. Simply express your concern to one of our support guys and they'll take care of you. We limit 25 for for the sake of being cautious and feel 25 is a fair ammount for the average use. We certainly understand there are special cases and will do all we can to make a solution that's right for you!