I was using Amazon windows instance for one of our client. We wanted to continue using this for some more time so we thought of exploring some options where we can minimize the cost (Reserved Instances).
Amazon offers Reserved Instance where in you have to pay much lesser cost for the instances that you plan to use for a longer period of time. The way it works is,
1) You decide how long you want to commit to the instance 1 Year or 3 years.
2) You decide the region in which you want the instance
3) Decide the type of instance you want to go for.
Be very cautious while choosing various options here because whatever you choose is not reversible or editable at all.
After this, once your payment is done, (probably at the end of the month when your bill is generated), you are eligible for the EC2 Reserved Instance, and your billing will now be at a very low price per hour. If you have a running instance it will be billed as a reserved instance or if you bring up new instance of the same configuration then it will be treated as the Reserved Instance. What ever option you go for the key is, same region and same configuration that you had chosen while specifying the configuration for Reserved Instance. If you have multiple instances of the same configuration in the same region then the one which is on for the longer period of time will be billed under Reserved Instance
(Amazon make sure that you pay less, they are being very nice to their customers :) )
How much do I save?
Although the usage charges are radically different for On Demand and Reserved Instances, there is a upfront cost that you pay for the later one. So unless you plan to use it for more than 5/8 months, you don't really save a lot. But if you have plan for using the instance for more time than this, then Reserved Instance is the best option to go for. For a longer use the savings are really significant.
I did some calculations for the instance that I was using Standard- Large (m1.large):
Windows:
For 4 months you pay $1283 for On Demand Instance. And pay $1486 for Reserved Instance.
For 5 months you pay $1728 for On Demand instance, and $1630 for Reserved Instance.
So your saving starts from 5th month on wards.
Linux:
For 6 months you pay $1468 for On Demand Instance, and $1428 for Reserved Instance.
For 7 months you pay $1713 for On Demand instance, and $1514 for Reserved Instance.
So your saving starts from 7th month on wards (obviously these figures are considering that your machine always on :) )
Savings would change depending upon the instance that you are using but surely you will save a lot in the long run.
Another interesting comparison is available @ http://spreadsheets.google.com/pub?key=rNtzGcAig_2X0xAP28V_2Jg
4 comments:
Does this 5 months and 7 months time slot applicable to all types of instances?
To calculate the cost use following formula :
For On Demand Instance :
$Price * 24 * Days
Where
$Price - is price per hours specified in the price list for that particular instance under OnDemand category.
24 - Hours in a day
Days - No of days you want to keep that instance.
For Reserved Instance:
One Time Fee + $Price * 24 * Days
Where
One Time Fee - Fee specified under One Time Fee head for On Demand Category for that specific instance type.
This is how I had calculated above figures of 5 months and 7 months, so this would help you in your calculations as well.
The pricing is available at
http://aws.amazon.com/ec2/pricing/
Checkout Amazon Calculator for your cloud expenses :
http://calculator.s3.amazonaws.com/calc5.html
Dear Mr. Surana,
My name is Sarah from Article Writing Services. We have a client who would like to pay you for the opportunity to post some of their content on your website. All of the content is professionally produced and you can select from pieces relevant to your audience.
The result is you get some free, interesting content for your readers while getting paid.
In return our client is asking for one link that they specify at the bottom of the content (no porn or gambling). Feel free to contact me with any concerns or clarifications you may have.
If you would like to see some examples of our content, please email me at sarah@article-writing-services.org so we can begin.
Sincerely,
Sarah Miller
Outreach Manager - Article Writing Services
sarah@article-writing-services.org
Post a Comment