external/og-aws
1
0
Fork 0
mirror of https://github.com/nickpoida/og-aws.git synced 2025-02-13 10:21:57 +00:00
Code Issues Releases Wiki Activity

Merge pull request #225 from em0ney/EC2

Browse source 
adding to the EC2 section
This commit is contained in:
Joshua Levy 2016-10-19 20:23:09 -07:00 committed by GitHub
commit b911837380
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
README.md
View file

@ -709,6 +709,7 @@ EC2
- 📒 [Homepage](https://aws.amazon.com/ec2/) ∙ [Documentation](https://aws.amazon.com/documentation/ec2/) ∙ [FAQ](https://aws.amazon.com/ec2/faqs/) ∙ [Pricing](https://aws.amazon.com/ec2/pricing/) (see also [ec2instances.info](http://www.ec2instances.info/)\)
- **EC2** (Elastic Compute Cloud) is AWS’ offering of the most fundamental piece of cloud computing: A [virtual private server](https://en.wikipedia.org/wiki/Virtual_private_server). These “instances” can run [most Linux, BSD, and Windows operating systems](https://aws.amazon.com/ec2/faqs/#What_operating_system_environments_are_supported). Internally, they use [Xen](https://en.wikipedia.org/wiki/Xen) virtualization.
- The term “EC2” is sometimes used to refer to the servers themselves, but technically refers more broadly to a whole collection of supporting services, too, like load balancing (CLBs/ALBs), IP addresses (EIPs), bootable images (AMIs), security groups, and network drives (EBS) (which we discuss individually in this guide).
- 💸**[EC2 pricing](https://aws.amazon.com/ec2/pricing/)** and **[cost management](#ec2-cost-management)** is a complicated topic. It can range from free (on the [AWS free tier](https://aws.amazon.com/free/)) to a lot, depending on your usage. Pricing is by instance type, by hour and changes depending on AWS region and whether you are purchasing your instances [On-Demand](https://aws.amazon.com/ec2/pricing/on-demand/), on the [Spot market](https://aws.amazon.com/ec2/spot/) or pre-purchasing ([Reserved Instances](https://aws.amazon.com/ec2/pricing/reserved-instances/)).
### EC2 Alternatives and Lock-In
@ -724,6 +725,7 @@ EC2
- Selecting instance types is complex since there are so many types. Additionally, there are different generations, released [over the years](https://aws.amazon.com/blogs/aws/ec2-instance-history/).
- 🔹Use the list at [**ec2instances.info**](http://www.ec2instances.info/) to review costs and features. [Amazon’s own list](https://aws.amazon.com/ec2/instance-types/) of instance types is hard to use, and doesn’t list features and price together, which makes it doubly difficult.
- Prices vary a lot, so use [**ec2instances.info**](http://www.ec2instances.info/) to determine the set of machines that meet your needs and [**ec2price.com**](http://ec2price.com/) to find the cheapest type in the region you’re working in. Depending on the timing and region, it might be much cheaper to rent an instance with *more* memory or CPU than the bare minimum.
- **Turn off** your instances when they aren’t in use. For many situations such as testing or staging resources, you may not need your instances on 24/7, and you won’t need to pay EC2 hourly costs when they are suspended. Given that costs are calculated based on hourly usage, this is a simple mechanism for cost savings. This can be achieved using [Lambda and CloudWatch](https://aws.amazon.com/premiumsupport/knowledge-center/start-stop-lambda-cloudwatch/), an open source solution like [Scalr](https://github.com/Scalr/scalr) or a SaaS provider like [GorillaStack](https://www.gorillastack.com). (Note: if you turn off instances with an ephemeral root volume, any state will be lost when the instance is turned off. Therefore, for stateful applications it is safer to turn off EBS backed instances).
- [**Dedicated instances**](https://aws.amazon.com/ec2/purchasing-options/dedicated-instances/) and [**dedicated hosts**](https://aws.amazon.com/ec2/dedicated-hosts/) are assigned hardware, instead of usual virtual instances. They are more expensive than virtual instances but [can be preferable](https://aws.amazon.com/ec2/dedicated-hosts/) for performance, compliance, or licensing reasons.
- **32 bit vs 64 bit:** A few micro, small, and medium instances are still available to use as 32-bit architecture. You’ll be using 64-bit EC2 (“amd64”) instances nowadays, though smaller instances still support 32 bit (“i386”). Use 64 bit unless you have legacy constraints or other good reasons to use 32.
- **HVM vs PV:** There are two kinds of virtualization technology used by EC2, [hardware virtual machine (HVM) and paravirtual (PV)](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/virtualization_types.html). Historically, PV was the usual type, but [now HVM is becoming the standard](https://www.opswat.com/blog/aws-2015-why-you-need-switch-pv-hvm). If you want to use the newest instance types, you must use HVM. See the [instance type matrix](https://aws.amazon.com/amazon-linux-ami/instance-type-matrix/) for details.