Lessons Learned about Availability Zones

By -

Understanding How AWS is Physically Set Up
For the latest on AWS Infrastructure, see: https://aws.amazon.com/about-aws/global-infrastructure/
This tells us about how physically AWS is set up across the globe.



In this map, it shows AWS Regions and few upcoming regions.
What is AWS Region?
Each region is a geographical area that is the collection of availability zones and data centers.
The AWS Regions are kept across the world, where data transmission from the physical device would take less time and to provide the best performance to the customers.
There are some consumer-based regions and government based regions (GovCloud).
What is an Availability Zone?
Availability Zone is a geographical physical location that holds an AWS data center.
This is where physical hardware is present and any data that is stored in AWS will be located here.
Why Multiple Availability Zones?
Considering the High Availability and Fault Tolerance, if there is any natural disaster in one of the availability zones data center. 
For redundancy, Most of the data files are backed up in the other two availability zones. As long as the entire Region is not knocked out, we should be able to access the files or data stored in AWS.
Within the datacenters, we have AWS Resources like S3 Bucket connected with EC2 Instances, etc.




For each Amazon Region, there is an End-Point.


More Information:  
https://docs.aws.amazon.com/en_pv/general/latest/gr/rande.html#endpoint-tables
Now, Find out your AWS Region and No. of Availability Zones in your Continuous Deployment Tool/Project.

Popular Posts

JMeter Producing Error: Windows RegCreateKeyEx(...) returned error code 5

By -
After running JMeter.bat on Command Line, Problem java.util.prefs.WindowsPreferences <init> WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5. Cause Environment Resolving the problem The error occurs because java.util.prefs.WindowsPreferences is trying to save information in HKEY_LOCAL_MACHINE\Software\JavaSoft\Prefs instead of under HKEY_CURRENT_USER\Software\JavaSoft\Prefs. Windows 7 64-bit The work around is to Open JMeter.bat file as the administrator and so it creates the key HKEY_LOCAL_MACHINE\Software\JavaSoft\Prefs.
Read more

Understanding about Contract Testing

By -
Image
Yesterday Morning (9th May 2020), I had good discussion with  Sundaresan  Krishnaswami on " Contract Testing ". I thank  Sundaresan   for his time and sharing his knowledge. It started with an example: The Owner provides the house or Place of Residence to the Tenants. "Rent Agreement" is provided for the house and It contains agreement to use the house. The house comes with like kitchen, living room, bed room, fans, geysers etc.. It also contains who resides and what is the contractual period, obligation (money) etc.. Here, Owner is the Server and Tenant is Client.                                         Client-Server Architecture. Illustrating the same in the E-Commerce Context: In Some Development Companies, There can be two teams developing the Payments and Orders APIs. In B2B or B2C Ecommerce applications, we place an order using web browser through payment methods and Order is created. Order is successful only when Payment is successful. In general, Payments te
Read more