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Showing posts from February, 2025

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Challenges at Scale - 5

on February 21, 2025

data engineering data ingestion ecommerce Engineering Leadership high scalability Kafka retail Scaling challenges

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Challenges at Scale - 4

on February 20, 2025

REST APIs Scaling challenges Standards and Protocols Streaming data Websockets

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Challenges at Scale - 3

on February 19, 2025

API Integration API Platform APIs Developer Experience Engineering Leadership Engineering Management REST APIs SDKs

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Challenges At Scale - 2

on February 18, 2025

DDOS Engineering engineering challenges Engineering Leadership high scalability security

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Challenges At Scale - 1

on February 17, 2025

Engineering engineering challenges Engineering Leadership high scalability Kubernetes logging scalability

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Why ProtoBuf? A hands-on lab to motivate you to try it out.

on February 07, 2025

high scalability ProtoBuf

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All you need to know about ProtoBuf

on February 04, 2025

high scalability ProtoBuf Protocol Buffers Websockets

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Should I buy refurbished laptop from Amazon?

This post is based on my experience with amazon.in and guess it to be true on all other platforms as well. At least you can check out and verify for these pointers before you make that decision to buy renewed/refurbished laptop on Amazon with your hard earned money. I see this question propping up in several forums and on many different occasions. In the recent past, I had my 5 year old dell laptop that gave up because its motherboard failed. One of the options that I had in my mind was to re-use the HDD and the 16GB DDR4 RAM of that old laptop in the one that I purchase next as secondary. I had come to a conclusion that it is not worth buying a refurbished/renewed laptop at all. Why? For the following reasons, most of which I see as BIG #RedFlags: You got to remember that Amazon provides a platform for 3rd party sellers to sell their products as well. So in your search for refurbished laptops you wouldn’t want to choose some random 3rd party seller who Amazon doesn’t endorse. You...

Android Activity's onDestroy() Ain't Your Reliable Friend

Look at the Android Activity life-cycle events in the picture beside. The lifecycle isn't something new. You're familiar with it right? You're also that good Android developer that writes clean code, wherein you consciously override onDestroy() method to include resources clean-up code and save some state, right? Per Android doc , it is okay and usually the practice to write cleanup code in this method but not anything beyond that. So if you are to write code to persist state in this method, or anything else beyond resource clean-up (like threads associated with an activity), you're better off to push it up the life-cycle, either in onStop() or onPause() method. That is how I settled in the first iteration of new learning but wasn't happy. Why? To quote Android Doc:

All you need to know about ProtoBuf

Google's ProtoBuf aka Protocol Buffers has been there for a good while now. It is free, open-sourced, data serialization format. But why use this? Because it is language agnostic, platform-neutral. And in comparison to text based format like json, it is extremely fast and compact. Lastly, it eases your development and maintenance endeavors too. How easy is it to work with? Start by defining your DTO (Data Transfer Object) to be passed over the network in a `.proto` file. Use protobuf compiler to generate corresponding source code of the DTO in language of your choice (protobuf supports many popular languages). You are now ready to use this generated source code in your project. If you come across a need to change the DTO structure, repeat the process 1-3 again. When to use it? Now I prefer REST/JSON format for most occasions to maximize the advantages of HTTP infrastructure. And then there are occasions, I prefe...

Essential Vim For CKAD Or CKA Exam

If you are preparing for CKAD or CKA exam and are new to Vim/Vi, this post will help you know everything that is essential to being productive with Vim during your exam. Vim has 3 modes as depicted in picture below: In Command Mode , you do things like navigating your cursor from one point to another in your text file, or delete text or replace text or select text or things like that. When you open Vim, you will be in this mode to begin with. In Insert Mode , you insert text and delete text with [backspace] key :) In Execution Mode , you do things like search text in file, set tab length, set line numbers in editor and stuff like that.

How to disable gnome-ssh-askpass?

Today we had setup Git repo with access to it through corporate's LDAP authentication. From the client machines we can access it using the .netrc (where the machine, login and password are configured). However, for some wierd reason, upon trying to pull/push commits from/to the Git repository, the bash shell tries to open the gnome-ssh-askpass dialogue and it fails. I wanted to prevent the bash shell from attempting to launch the dialogue box. To do this, all I had to do is run the following command in the terminal: $ unset SSH_ASKPASS To prevent it in future, you can add the above line in your .bashrc or .bash_profile. Wish you trouble-free working!

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