cloud

What exactly is the difference between Apache's Mesos and Google's Kubernetes? I understand both are server cluster management software. Can anyone elaborate where the main differences are - when would which framework be preferred? Why would you want to use Kubernetes on top of Mesosphere ? Craig Mcluckie Kubernetes is an open source project that brings 'Google style' cluster management capabilities to the world of virtual machines, or 'on the metal' scenarios. It works very well with modern operating system environments (like CoreOS or Red Hat Atomic) that offer up lightweight computing

IPython + Notebook 提供了一种基于云的科学计算开发环境。它既能够使开发者享受到云计算的强大计算能力，也能够使开发者无需在自己本地安装任何软件就能有良好的开发界面。此外，从本地到云端，带宽要求极低。 准备工作：只需要你的本地浏览器即可！！ 注册一个云计算帐号 这里我们建议注册超能云（SuperVessel Cloud）（注册网址： http://www.ptopenlab.com ）。原因有两个： 超能云是OpenPOWER基金会支持下构建的，完全面向开发者免费的云平台。 超能云目前已经有了支持IPython + Notebook的镜像，免费供开发者使用。 (关于超能云SuperVessel 本身，可参看链接： http://my.oschina.net/u/1431433/blog/380504 ) 注册步骤很简单（如果您已经有了帐号，可以直接到下面一节） 进入网址： http://www.ptopenlab.com 。 点击右上方的“注册”按钮。在弹出的对话框填写你的有效邮箱地址，还有密码。邮箱地址必须有效，因为超能云（SuperVessel）会给您发一封激活的邮件。 3. 进入你注册使用的邮箱，有一封发自admin@ptopenlab.com的邮件，点击里面的激活链接，你的帐号就可以被激活使用了。 建立一个支持IPython + Notebook的虚拟机 1.

Recently Amazon launched Lightsail . Is there any difference between them? If yes, then what's the difference? Are Lightsail instances more powerful than EC2? Testing¹ reveals that Lightsail instances in fact are EC2 instances, from the t2 class of burstable instances. EC2, of course, has many more instance families and classes other than the t2, almost all of which are more "powerful" (or better equipped for certain tasks) than these, but also much more expensive. But for meaningful comparisons, the 512 MiB Lightsail instance appears to be completely equivalent in specifications to the

I'm writing a simple logging service in DynamoDB. I have a logs table that is keyed by a user_id hash and a timestamp (Unix epoch int) range. When a user of the service terminates their account, I need to delete all items in the table, regardless of the range value. What is the recommended way of doing this sort of operation (Keeping in mind there could be millions of items to delete)? My options, as far as I can see are: A: Perform a Scan operation, calling delete on each returned item, until no items are left B: Perform a BatchGet operation, again calling delete on each item until none are