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Amazon Relational Database Service (Amazon RDS) is meant to support relational database usage in cloud.
RDS lets us access MySQL, MariaDB, Oracle, SQL Server, or PostgreSQL databases and our current database operations can be performed in cloud.
As per AWS documentation the following are the databases or schemas capacity within DB instance,
RDS for Amazon Aurora has no limit imposed by software
RDS for MySQL has no limit imposed by software
RDS for MariaDB has no limit imposed by software
RDS for Oracle has 1 database per instance; has no limit on number of schemas per database imposed by software
RDS for SQL Server has 30 databases per instance
RDS for PostgreSQL has no limit imposed by software
Components of 3 tier architecture – Web server vs Application server vs Database server
Web server serves a web content (HTML and static content) over the HTTP protocol.
Application server is a container on which one can build and expose business logic and processes to client applications through various protocols like HTTP. Some cases it will have internal web server. Application server is heavy in terms of resource usage.
Database server refers to the back-end system of a database application using client/server architecture. The database server performs tasks such as data analysis, storage, data manipulation, archiving, and other non-user specific tasks
Amazon Web Services (AWS) is a subsidiary of amazon.com. AWS currently provides more than 100 services and helps to setup high computing power, data storage, queuing, notification, machine learning, security, monitoring services available under AWS management console.
AWS Free Tier includes 750 hours of Linux and Windows t2.micro instances each month for one year as per Amazon website. Please check https://aws.amazon.com or https://aws.amazon.com/ec2/ website for more accurate details and to confirm this.
The quickest way to learn AWS is by creating free tier aws account by clicking below link.
VPC, EC2, S3, SNS, SQS, ML, Developer tools, Analytics, IAM, Media services etc.
What is VPC?
VPC lets us to place our AWS resources in a virtual network the way we wanted. As you can see below VPC 3 tier architecture holds the resources and makes a secure communication between the internet and your VPC.
VPC 3 tier architecture using AWS cloud services as below:
here in the above diagram, Availability zone 1 has Web server 1, App server 1 and DB server 1 orchestrated
Similarly, Availability zone 1 has Web server 2, App server 2 and DB server 2 orchestrated.
The load balancer is placed to handle the load between the servers
What is EC2?
EC2 stands for Amazon Elastic Compute Cloud is a cloud service provides secure, resizable compute capacity. In simple terms it allows us to setup a windows, Linux servers in 2-3 minutes.
How to setup a Windows server and Linux server?
AWS Free account gives access to AWS console.
Create a free account and select Linux and Windows t2.micro instances under EC2 option under AWS Dashboard.
Follow the instructions and make sure select “Free Tier Eligible servers” and after learning the process, terminate servers as to avoid the usage of computing services and storage.
Quick – easy to create/terminate servers.
Inexpensive – Gives an option to select the matching server configurations to reduce cost.
Secure – EC2 works along with VPC to provide high security with robust networking features.
Elastic Web scale computing – enable to increase/decrease server capacity in minutes by adding/removing 100 of servers simultaneously.
Integration – easy integration to VPC, S3, RDS etc.
Please click on S3Amazon Simple Storage Service (Amazon S3)
Please click on RDSAmazon Relational Database Service (Amazon RDS)
Please click on VPC– Amazon Virtual Private Cloud (Amazon VPC)
Please click on RPA Amazon Relational Database Service (Amazon RDS)
How to handle the error popup on site security certificate is not trusted with chrome selenium python automation
For Chrome, add –ignore-certificate-errors in following code
options = webdriver.ChromeOptions()
driver = webdriver.Chrome(chrome_options=options)
For the Internet Explorer, set acceptSslCerts desired capability as true:
capabilities = webdriver.DesiredCapabilities().INTERNETEXPLORER
capabilities[‘acceptSslCerts’] = True
driver = webdriver.Ie(capabilities=capabilities)