What is RDS?

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

Amazon S3

S3 enables companies to store massive amount of data in a secure way. S3 enables companies to store, retrieve data. 


High durability, availability, and scalability. S3 provides the most comprehensive compliance capabilities.

S3 allows  data storage up to 5 terabytes 

S3 provides a REST web services interface supporting any internet development tool kit.

S3 is available in any AWS region worldwide





Components of 3 tier architecture – Web server vs Application server vs Database server

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 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  // or // 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.

Different AWS cloud services?

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:
Amazon VPC – 3 tier architecture

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 RDS Amazon 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 run selenium on linux server using Firefox binary

How to run selenium on linux server using Firefox binary

String Xport = System.getProperty(“”, “:1”); // setup firefox binary to start Xvfb
final File ffPath = new File(System.getProperty(“lmportal.deploy.firefox.path”, “/usr/bin/firefox”));
FirefoxBinary ffBinary = new FirefoxBinary(ffPath);
ffBinary.setEnvironmentProperty(“DISPLAY”, Xport);

WebDriver driver = new FirefoxDriver(ffBinary, null);
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

How to handle the error popup on site security certificate is not trusted with chrome selenium python automation

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)

For Firefox, set accept_untrusted_certs as true

profile = webdriver.FirefoxProfile()
profile.accept_untrusted_certs = True
driver = webdriver.Firefox(firefox_profile=profile)


Short/Nick NameRuns in this summer seasonWickets in this summer season Team 🙂Number of CatchesNumber of Sixes

What are the limits in Salesforce

What are the limits in Salesforce

  1. Master detail relationships – 2
  2. Look up relationships – 40
  3. No.of dashboard components – 20
  4. Total Workflow rules per object – 500
  5. Active workflow rules – 50
  6. Approval process – 500
  7. Sharing rules (Criteria and Ownership based) – 300
  8. Sharing rules (Criteria based only) -50
  9. Validation rules – 100
  10. Field tracking – 20 (Additional 20 with chatter)
  11. No. of custom objects – 2000
  12. No. of custom fields – 500

Nia’s readings

Nia’s readings from Library,

  1. Ms. Leakey Is Freaky! – by Dan Gutman
  2. Ms. Hannah Is Bananas! – by Dan Gutman
  3. Nancy Drew and the Clue Crew- Case of the Sneaky Snowman by Carolyn Keene
  4. Diary of a Wimpy Kid Rodrick Rules by Jeff Kinney
  5. Help your Kids with Computer Coding 
  6. The phantom bully by Jeffrey Brown.
  7. Goosebump series Be careful what you wish for Samantha Byrd
  8. Goosebump series Night of the Living dummy Lindy Powell
  9. Goosebump series Night of the Living dummy Kris Powell
  10. Goosebump series Say Cheese and die Greg Banks
  11. Goosebump series Say Cheese and die Shari Walkar
  12. Goosebump series Be careful what you wish for – Samantha Byrd
  13. Goosebump series Stay out of the basement
  14. Carolines secret message
  15. Coach Hyatt is a Riot ! by Dan Gutman
  16. The Riddle of the Robin
  17. out of this world
  18. Dan Gutman – oh Valendtine we’ve lost our minds
  19. Sarah Mlynowski – whatever after dream on
  20. Sarah Mlynowski – whatever after bad hair day
  21. Lacey Little Mermaid Fairy
  22. Nancy Drew and the Clue Crew
  23. Miss Lazar is Bizarre
  24. Gemma and the Ultimate Standoff
  25. Owl Diaries Eva and Baby Mo
  26. A J’s Rules for school
  27. My first monologue
  28. When the Ghost Dog Howls
  29. Cinderella