Sakthi Priyan on Sakthi Priyan H

India Is Just 3% of the World Market — Why I Invest Globally

Sun, 23 Aug 2026 00:00:00 +0000

If you invest only in India, you own about 3% of the world’s equity market. Chapter 1 of The Global Indian Investor — the case for looking beyond the NSE/BSE.

Bank of Baroda FX Retail for IBKR: From a ₹0.10 Per USD Markup to an Additional Foreign Bank Charge

Sat, 22 Aug 2026 00:00:00 +0000

The full record of onboarding Bank of Baroda as a second FX Retail relationship bank — a cold email to treasury, branch paperwork, a USD 100 test remittance, the real 2-day transfer and SWIFT message quirks that followed, and a structural Foreign Bank Charge that narrows its cost advantage.

FX Retail via BHIM Bharat Connect: An 11-Day Lien and What It Actually Cost

Sat, 22 Aug 2026 00:00:00 +0000

A failed FX Retail booking via BHIM Bharat Connect put a substantial sum under lien for 11 days, with BHIM, ICICI, and FX Retail each pointing at the others. The money came back — the July 31 entry window it was meant for never did. The full account, and what it actually cost.

My Credit Card Stack: Consolidating to 3 Banks and 3 Networks

Sat, 22 Aug 2026 00:00:00 +0000

Financing a laptop via a zero-cost EMI offer triggered a broader credit card churn — picking up an Axis Neo RuPay card, closing an inactive HDFC Swiggy card, hitting a rejected ICICI Coral application, and landing on a deliberate 3-bank, 3-network card design.

State of the 1 Portfolio — Returns, Allocation & Rebalancing (August 2026)

Sat, 22 Aug 2026 00:00:00 +0000

August 2026 edition of “State of the 1 Portfolio” report covering portfolio returns, asset allocation, drift, and this month’s eventful investment

Demystifying ITR-2: My FY 2025-26 Tax Filing Journey

Fri, 14 Aug 2026 00:00:00 +0000

A schedule-by-schedule reconstruction of my actual ITR-2 filing for FY 2025-26 — backtracking every schedule from Salary (Sched S) to Other Sources (Sched OS), Capital Gains (Sched CG & 112A), Foreign Assets (Sched FA), Assets & Liabilities (Sched AL), and TCS tax credit setoff.

Xfina: One Rust Core, Five Interfaces — Building a Privacy-First Financial Statement Parser

Sat, 08 Aug 2026 00:00:00 +0000

Parsing Indian financial statements locally with Rust, WebAssembly, and a single shared core across Rust, Python, JavaScript, CLI, and the web.

State of the 1 Portfolio — Returns, Allocation & Rebalancing (July 2026)

Fri, 03 Jul 2026 00:00:00 +0000

July 2026 edition of “State of the 1 Portfolio” report covering portfolio returns, asset allocation, drift, and system optimizations

State of the 1 Portfolio — Returns, Allocation & Rebalancing (June 2026) + Book Preview

Mon, 29 Jun 2026 00:00:00 +0000

A detailed review of the ‘1 Portfolio’ as of June 2026, covering returns, asset allocation, and rebalancing, along with a preview of my upcoming book.

The Perpetual Rebalancing Framework

Mon, 29 Jun 2026 00:00:00 +0000

A unified portfolio operating system that handles buying, selling, liquidity management, and withdrawals under one coherent rule set for both Accumulation and Retirement Phases.

State of the 1 Portfolio — Returns, Allocation & Rebalancing (June 2026)

Fri, 05 Jun 2026 00:00:00 +0000

June 2026 edition of “State of the 1 Portfolio” report covering portfolio returns, asset allocation, drift, and system optimizations

Perpetual Rebalancing: Engineering a Mathematically Superior SIP Allocator

Sat, 23 May 2026 00:00:00 +0000

How I upgraded my RealValue Family SIP Allocator from a proportional drift allocation model to an even drift optimization model and why it compressed the negative drift band by 75%.

Why Static SIP Allocation Is Inefficient (And How Cashflow Rebalancing Fixes It)

Sat, 23 May 2026 00:00:00 +0000

Static SIPs blindly invest fixed amounts regardless of portfolio drift. Cashflow-Based Rebalancing uses new investments to continuously correct allocation drift — enabling tax-efficient perpetual rebalancing during the accumulation phase.

The Opportunity Cost of TCS

Sun, 10 May 2026 00:00:00 +0000

When I first learned about TCS on LRS remittances, my instinct was to stay below the ₹10 lakh threshold. Paying 20% TCS sounded like locking away a large portion of capital for more than a year.

But after computing the numbers carefully, I realized the situation was not as bad as it appeared—especially once Form 12BAA (now Form 122) allowed the TCS to be adjusted against salary TDS.

What is TCS on LRS?

When you remit money abroad under the Liberalised Remittance Scheme (LRS), the bank may collect Tax Collected at Source (TCS) during the transaction. This tax is collected when the remittance is executed.

FX Retail - A Deep Dive

Sat, 09 May 2026 00:00:00 +0000

FX Retail

FX Retail is a retail foreign exchange trading platform operated by the Clearing Corporation of India Limited (CCIL) under RBI guidance.
It allows individuals to access near-interbank FX rates through their relationship bank.

Instead of relying entirely on the bank’s opaque forex pricing, FX Retail lets you lock a USD/INR rate transparently on the platform, while the bank acts as the settlement partner for the remittance.

When configured properly, FX Retail can reduce forex costs significantly compared to standard bank remittance rates.

How to Transfer Money Efficiently?

Sat, 09 May 2026 00:00:00 +0000

Before selecting a broker or investment instrument, it is important to understand how money actually moves from India to an overseas brokerage account.

For Indian retail investors, the remittance process itself can materially impact long-term returns. A seemingly small FX markup of ~₹1.50 per USD compounds significantly over decades of investing.

This chapter focuses on sending money abroad efficiently under the Liberalised Remittance Scheme (LRS).

What is LRS?

The Liberalised Remittance Scheme (LRS) allows Indian residents to remit up to $250,000 (~₹2.4 Crores @ 94.55) per financial year for permitted purposes, including Indian investment abroad in equity capital (Purpose Code: S0001)

FX Retail via Bharat Connect: Private Bank Speed at Public Bank Rates — A Live Transaction Walkthrough

Tue, 05 May 2026 00:00:00 +0000

A step-by-step walkthrough of executing a live INR-to-USD forex transaction using FX Retail via Bharat Connect (BHIM), completing the remittance on ICICI Bank Money2World, and investing in an Irish ETF on IBKR

State of the 1 Portfolio — Returns, Allocation & Rebalancing (May 2026)

Sat, 02 May 2026 00:00:00 +0000

Monthly “State of the 1 Portfolio” report covering portfolio returns, asset allocation, drift, and rebalancing strategy

Managing Money Flows 2026

Sun, 26 Apr 2026 00:00:00 +0000

Manage and automate your money flow via purpose-built Bank Accounts, Credit Cards, and Mutual Funds.

3 Paths to Global Investing for Indians

Sat, 25 Apr 2026 00:00:00 +0000

For an Indian investor seeking global diversification, the key decision is not only what to invest in, but how to access international markets.

In practice, there are 3 primary paths,

Path 1: Domestic Mutual Funds
Path 2: Indian ETFs with International Exposure
Path 3: Direct International Investing via LRS

Each path offers different trade-offs in cost, flexibility, and accessibility.

A Quick Comparison

Path	Setup	Usage	Cost	Flexibility	Taxation	Market Access
1. Mutual Funds	Very Easy	Very Easy	Medium	Low	Low	Low
2. Indian ETFs	Easy	Easy	Medium	Low	Low	Low
3. Direct LRS	Moderate	Moderate	Low	Very High	Medium	Very High

Path 1: Domestic Mutual Funds

I have gained exposure to the Nasdaq 100 through two distinct Indian mutual funds. These instruments allow for international diversification using Indian Rupees (INR) without the complexities of direct foreign investing.

Managing Money Flows 2026

Sat, 25 Apr 2026 00:00:00 +0000

Manage and automate your money flow via purpose-built Bank Accounts, Credit Cards, and Mutual Funds.

Selecting the Global Indexes

Sat, 25 Apr 2026 00:00:00 +0000

In the previous chapter, we saw that Irish ETFs are more efficient for Indian investors compared to US ETFs. As part of this chapter, we will look at the Irish ETF universe and shortlist various ETFs available for Equities, Debt and Gold.

Important: When you pick the TICKER, ensure it is traded in USD to avoid additional currency conversions.

Global Equity ETFs

When expanding outside India, you want to capture either the entire investable world or focus purely on developed markets (since your domestic portfolio already gives you heavy emerging market exposure).

What to Buy - Irish ETFs vs US ETFs

Sat, 25 Apr 2026 00:00:00 +0000

The Philosophy: I am not trying to beat the benchmark; I am trying to be the benchmark. Therefore, I invest only in index funds and ETFs, not in individual stocks or actively managed funds.

When investing in US markets, Indian investors face a structural choice: buy US-domiciled ETFs listed in the United States, or buy Irish-domiciled UCITS ETFs that track the same indices.

Why I chose Irish ETFs

For Indian investors, US-domiciled ETFs introduce three structural issues:

Why Beyond India?

Sat, 25 Apr 2026 00:00:00 +0000

The World Has More Than One Market

The global equity universe spans dozens of countries, hundreds of industries, and tens of thousands of companies. India, despite its growth story, is a small slice of that universe. This chapter makes the case for why every serious long-term investor should look beyond the NSE/BSE.

If you invest only in India, you are investing in roughly 3% of the world’s equity markets.
That is not a strategy. That is a blind spot.

Building Truly Serverless Big Data Pipelines: Scaling with AWS Lambda and Step Functions

Thu, 23 Apr 2026 00:00:00 +0000

How to build an N-stage Driver/Executor model using AWS Lambda and Step Functions that handles massive batch and micro-batch workloads without a single dedicated server, eliminating cluster maintenance and scaling instantly to zero

INR to USD: FX Retail Web vs FX Retail Bharat Connect vs Direct Bank Rates

Wed, 08 Apr 2026 00:00:00 +0000

A comparison of foreign exchange rates for converting INR to USD across different channels like direct banking, FX Retail Web, and the newly discovered FX Retail via Bharat Connect.

Red Days = Productive Days: Portfolio Reset

Sun, 05 Apr 2026 00:00:00 +0000

How I tagged every fund to a goal, identified the noise, and consolidated 30 funds across 5 goals into a cleaner, simpler setup — using a market dip as the trigger.

Red Days = Productive Days: Portfolio Reset

Sun, 05 Apr 2026 00:00:00 +0000

How I tagged every fund to a goal, identified the noise, and consolidated 30 funds across 5 goals into a cleaner, simpler setup — using a market dip as the trigger.

RealValue Portfolio

Thu, 02 Apr 2026 00:00:00 +0000

Analyze CAS PDFs and IBKR CSVs in one dashboard. Auto-extract holdings, compute transaction-based XIRR (INR/USD), review allocation views, and export cashflows for independent verification.

State of the Portfolio: Returns, Allocation and Strategy — Edition 1

Thu, 02 Apr 2026 00:00:00 +0000

Annual portfolio review for FY 2025–26: Three goal-based portfolios, allocation strategy, drift correction and forex cost optimization.

Perpetual Rebalancing: A Practical Framework for Long-Term Wealth

Tue, 24 Mar 2026 00:00:00 +0000

A practical, tax-efficient, and behaviorally robust system for portfolio rebalancing tailored for Indian investors.

Stop Paying ₹1.5/USD! Cut Forex Markup When Funding IBKR (India Guide)

Thu, 19 Mar 2026 00:00:00 +0000

How to avoid high forex markups (₹1.5/USD) when funding your Interactive Brokers (IBKR) account from India. Step-by-step guide to save on currency conversion costs.

Using Form 12BAA to Reduce Cashflow Drag on International Investments

Thu, 19 Mar 2026 00:00:00 +0000

How salaried Indians investing internationally via LRS can use Form 12BAA to reduce cashflow drag from TCS, optimize compounding, and avoid capital lock-in.

RealValue FX Engine

Sun, 15 Mar 2026 00:00:00 +0000

Calculate your true effective FX rate including hidden spreads and taxes, compare quotes across banks to minimize costs, track your ₹10L LRS limit via a browser-only transaction log, and compute your TCS refund opportunity cost.

How to Invest in NASDAQ 100 from India (Mutual Funds, ETFs, and IBKR Guide)

Sat, 14 Mar 2026 00:00:00 +0000

Options to invest in the NASDAQ 100 index from India — covering mutual funds, Indian ETFs, and the LRS route via Interactive Brokers — along with a comparison of Indian apps vs IBKR with UCITS ETFs, buying cost, and taxation.

Cut Bank Forex Markup on INR to USD Using FX Retail | IBKR Funding, Forex Card, LRS

Wed, 11 Mar 2026 00:00:00 +0000

Indian investors lose 2-3% to hidden bank forex markup on every INR to USD transfer. Learn how to use FX Retail to negotiate lower rates for IBKR funding, forex card loading, and LRS remittances.

Funding Interactive Brokers from India Using FX Retail

Tue, 10 Mar 2026 00:00:00 +0000

How Indian investors can reduce the hidden forex markup cost when funding Interactive Brokers accounts by using FX Retail instead of the bank’s default remittance rate.

₹1 Crore Home Loan — The Reality (Nominal vs Real Cost)

Thu, 05 Mar 2026 00:00:00 +0000

What a ₹1 Crore home loan at 8% truly costs in nominal vs real terms across 10, 15, and 20 year tenures.

₹1 Crore Home Loan — The Reality

Wed, 04 Mar 2026 00:00:00 +0000

What a ₹1 Crore home loan at 8% truly costs — the gap between nominal fear and real burden across 10, 15, and 20 year tenures.

₹1 Crore in 10 Years — The Real Math (With Inflation, Taxes & Growth Plan)

Wed, 25 Feb 2026 00:00:00 +0000

Most SIP calculators lie to you. Here’s the real math behind ₹1 Crore in 10 years — accounting for inflation, exit tax, and a growing SIP.

₹1 Crore in 10 Years — The Real Math

Sun, 22 Feb 2026 00:00:00 +0000

Why your ₹1 Crore target might need ₹1.79 Crores — inflation, tax, and the truth about wealth planning.

Intelligent Family SIP Allocator: Cashflow Rebalancing with Tax & TCS Optimization

Thu, 19 Feb 2026 00:00:00 +0000

Discover how to intelligently allocate monthly SIPs across multiple family members, optimize for tax slabs, handle international assets with TCS, and rebalance portfolios using cashflow—all without selling existing holdings.

RealValue Family SIP Allocator

Sun, 15 Feb 2026 00:00:00 +0000

A smart cashflow rebalancing engine that minimizes allocation drift across investors, with built-in tax-slab optimization and automated international TCS handling.

Real Value EMI Engine: See the TRUE Cost of Loans After Inflation (India)

Sat, 24 Jan 2026 00:00:00 +0000

Understand the real (inflation-adjusted) cost of loans in India using the RealValue EMI Engine — see what you truly pay over time, post-tax and post-inflation.

RealValue EMI Engine Use Cases

Fri, 23 Jan 2026 00:00:00 +0000

Discover real-world scenarios showing how to use the RealValue EMI Engine for home loans, car loans, personal loans, and understanding the true cost of debt with inflation-adjusted calculations.

RealValue EMI Engine

Thu, 15 Jan 2026 00:00:00 +0000

Understand your loan’s true cost with real (inflation-adjusted) value projections and EMI burden visualizations.

Debt Is a Tool, Not an Enemy | Smart Loans vs Bad Loans Explained

Wed, 14 Jan 2026 00:00:00 +0000

Understanding the difference between smart loans and bad loans. Learn when debt can be a powerful tool for wealth creation and when it becomes a burden.

Why Debt Is a Tool — Not an Enemy

Sun, 11 Jan 2026 00:00:00 +0000

Understanding when and how to use debt strategically for building wealth.

The Uber Binary Pattern in Go: Build Once, Run Everywhere

Sat, 10 Jan 2026 00:00:00 +0000

How using a single uber binary with symbolic links can reduce container image size, build time & build infrastructure costs and image initialization time for Go applications across server/serverless deployment modes

RealValue SIP Engine | Investment Planning Tool for India

Sat, 03 Jan 2026 00:00:00 +0000

Complete walkthrough of the RealValue SIP Engine — a powerful investment planning tool that shows real (inflation-adjusted) returns, handles multiple goal types, and provides comprehensive financial projections.

RealValue SIP Engine Use Cases

Sat, 03 Jan 2026 00:00:00 +0000

Discover real-world scenarios showing how to use the RealValue SIP Engine for retirement planning, education goals, house down payments, emergency funds, and more.

RealValue SIP Engine

Thu, 01 Jan 2026 00:00:00 +0000

Plan your systematic investment with real (inflation-adjusted) value projections and comprehensive growth visualizations.

💳 Credit Cards: Usage, Risks & Smart Practices

Wed, 24 Dec 2025 00:00:00 +0000

Credit cards can be powerful tools for rewards, convenience, and short-term liquidity when used with discipline.

💳 Credit Cards: Usage, Risks & Smart Practices

Thu, 18 Dec 2025 00:00:00 +0000

Credit cards can be powerful tools for rewards, convenience, and short-term liquidity when used with discipline.

Why Rule-Based Global & Multi-Asset Portfolio Beats a Single Multicap or Flexicap Fund

Tue, 09 Dec 2025 00:00:00 +0000

A comparison between a typical multicap/flexicap fund and a globally diversified, rule-based multi-asset allocation strategy.

My Asset Allocation & Rebalancing Explained

Sun, 07 Dec 2025 00:00:00 +0000

A practical breakdown of how I allocate my portfolio across India, US, Debt, and Gold — and my simple, tax-efficient rebalancing method using monthly cash flow.

My Asset Allocation & Rebalancing

Sat, 06 Dec 2025 00:00:00 +0000

How early financial decisions can create huge long-term opportunity costs.

How I missed a Crore

Sun, 30 Nov 2025 00:00:00 +0000

How early financial decisions can create huge long-term opportunity costs.

How I Missed a Crore

Sun, 30 Nov 2025 00:00:00 +0000

How one early decision at age 22 created a ₹1 crore opportunity difference — and the lessons for long-term wealth building.

How to Invest in Debt in India 2025 for Building Wealth

Sun, 23 Nov 2025 00:00:00 +0000

How to Invest in Debt in India 2025 for Building Wealth using Arbitrage, Liquid, Hybrid & Dynamic Bond funds

How to Invest in Debt for Building Wealth

Sat, 22 Nov 2025 00:00:00 +0000

Learn the best ways to use Debt investment for short term, long term and portfolio asset allocation

Building SQL Translator using AI Coding Agents

Fri, 21 Nov 2025 00:00:00 +0000

A comprehensive walkthrough of building an extensible SQL translator framework using AI coding agents, ANTLR grammars, unified IR and YAML-driven testing.

How to Invest in Gold for Building Wealth

Sat, 15 Nov 2025 00:00:00 +0000

Learn the smartest ways to invest in Gold using ETFs, Mutual Funds and more.

How to Invest in Gold in India 2025

Sat, 15 Nov 2025 00:00:00 +0000

Invest in Gold via ETFs, Mutual Funds, SGB & Digital Gold

Equity & Index Funds for Building Wealth | Simple. Smart. Boring. Powerful.

Sun, 09 Nov 2025 00:00:00 +0000

Understand how to build long-term wealth through Equity & Index Funds — simple, smart, and powerful investing without predictions.

Equity & Index Funds for Building Wealth

Thu, 06 Nov 2025 00:00:00 +0000

Simple. Smart. Boring. Powerful. Grow Wealth through Equity & Index Funds.

Building Your Emergency Fund

Tue, 04 Nov 2025 00:00:00 +0000

Why You Need an Emergency Fund

Before you start investing aggressively, you need a financial cushion. An emergency fund is money set aside for unexpected expenses like:

Job loss
Medical emergencies
Home or car repairs
Family emergencies

How Much Do You Need?

The standard recommendation is 6 months of expenses. However, this can vary based on:

Job stability
Number of dependents
Income variability
Health conditions
Other sources of income

Conservative Approach (9-12 months)

If you:

Introduction to Building Wealth

Tue, 04 Nov 2025 00:00:00 +0000

Welcome to Your Wealth-Building Journey

Building wealth doesn’t have to be complicated, risky, or exciting. In fact, the most successful wealth-building strategies are often the most boring ones. This book will guide you through time-tested, proven methods that have helped millions of people achieve financial independence.

What Makes This Approach “Boring”?

When we say “boring,” we mean:

Predictable: No get-rich-quick schemes or market timing
Consistent: Regular, disciplined actions over time
Simple: Easy to understand and implement
Proven: Backed by decades of research and real-world results

What You’ll Learn

Throughout this book, you’ll discover:

The Magic of Compound Interest

Tue, 04 Nov 2025 00:00:00 +0000

Understanding Compound Interest

Albert Einstein allegedly called compound interest “the eighth wonder of the world.” Whether he said it or not, the sentiment is absolutely true. Compound interest is the interest earned on both your initial investment and the accumulated interest from previous periods.

The Formula

The basic formula for compound interest is:

A = P(1 + r/n)^(nt)

Where:
A = Final amount
P = Principal (initial investment)
r = Annual interest rate (decimal)
n = Number of times interest is compounded per year
t = Time in years

Real-World Example

Let’s say you invest ₹10,000 per month starting at age 25, with an average annual return of 12%:

Financial Tools

Sun, 02 Nov 2025 00:00:00 +0000

Quick overview of financial tools for building wealth

Financial Tools | Quick Overview for Building Wealth

Sun, 02 Nov 2025 00:00:00 +0000

Quick overview of essential financial tools — cash, insurance, investments, and credit — for building long-term wealth.

Emergency Fund Setup | Using Liquid/Hybrid/Arbitrage Mutual Funds

Tue, 28 Oct 2025 00:00:00 +0000

Learn how to set up your emergency fund using a mix of Liquid and Hybrid Mutual Funds for both liquidity and steady growth.

Emergency Fund Setup

Sun, 26 Oct 2025 00:00:00 +0000

Setup emergency fund using liquid/hybrid Mutual funds

Emergency Fund Calculator

Fri, 24 Oct 2025 00:00:00 +0000

Plan your emergency fund and calculate the timeline to reach your savings goal.

How I Manage My Money Flows 💰 | Bank Accounts, Credit Cards & Mutual Funds Explained

Sun, 19 Oct 2025 00:00:00 +0000

Complete breakdown of how to manage your money flows effectively using bank accounts, credit cards, and mutual funds.

Managing Money Flows

Sun, 19 Oct 2025 00:00:00 +0000

Manage money flow via Bank Accounts, Credit Cards & Mutual Funds

Invest in NASDAQ 100 from India

Sun, 12 Oct 2025 00:00:00 +0000

Options to invest in NASDAQ 100, process, cost and taxation

Invest in NASDAQ 100 from India

Sun, 05 Oct 2025 00:00:00 +0000

Complete guide on how Indian investors can invest in NASDAQ 100 index and benefit from US market growth.

AWS Infrastructure Essentials

Tue, 10 Jun 2025 00:00:00 +0000

Overview

Amazon Web Services (AWS) is the leading cloud platform, offering a comprehensive suite of services for building scalable applications. This chapter covers the essential AWS services and best practices for infrastructure setup.

Core AWS Services

1. Compute Services

EC2: Virtual machines in the cloud
Lambda: Serverless compute
ECS/EKS: Container orchestration
Fargate: Serverless containers

2. Storage Services

S3: Object storage
EBS: Block storage for EC2
EFS: Elastic file system
Glacier: Archive storage

3. Database Services

RDS: Managed relational databases
DynamoDB: NoSQL database
ElastiCache: In-memory caching
Aurora: High-performance MySQL/PostgreSQL

Infrastructure as Code

CloudFormation Template

AWSTemplateFormatVersion: '2010-09-09'
Description: 'Basic web application infrastructure'

Resources:
 WebServer:
 Type: AWS::EC2::Instance
 Properties:
 ImageId: ami-0c55b159cbfafe1f0
 InstanceType: t2.micro
 SecurityGroups:
 - !Ref WebServerSecurityGroup
 
 WebServerSecurityGroup:
 Type: AWS::EC2::SecurityGroup
 Properties:
 GroupDescription: Enable HTTP access
 SecurityGroupIngress:
 - IpProtocol: tcp
 FromPort: 80
 ToPort: 80
 CidrIp: 0.0.0.0/0

Terraform Configuration

provider "aws" {
 region = "us-west-2"
}

resource "aws_instance" "web" {
 ami = "ami-0c55b159cbfafe1f0"
 instance_type = "t2.micro"
 
 tags = {
 Name = "WebServer"
 }
}

resource "aws_s3_bucket" "assets" {
 bucket = "my-app-assets"
 
 versioning {
 enabled = true
 }
}

Networking

VPC Setup

Public and private subnets
Internet Gateway for public access
NAT Gateway for private subnet internet access
Security Groups for access control
Network ACLs for additional security

Example VPC Architecture

VPC (10.0.0.0/16)
├── Public Subnet (10.0.1.0/24)
│ ├── Internet Gateway
│ └── Load Balancer
└── Private Subnet (10.0.2.0/24)
 ├── Application Servers
 ├── Database Servers
 └── NAT Gateway

Best Practices

Use Multiple Availability Zones: Distribute resources across AZs for high availability
Implement Auto Scaling: Automatically adjust capacity based on demand
Enable CloudWatch Monitoring: Track metrics and set up alerts
Use IAM Roles: Grant permissions without hardcoded credentials
Tag Resources: Organize and track costs with meaningful tags
Enable Encryption: Encrypt data at rest and in transit
Regular Backups: Automate backup procedures for all critical data

Cost Optimization

Strategies

Use Reserved Instances for predictable workloads
Implement Auto Scaling to match demand
Use S3 lifecycle policies for data archival
Monitor and eliminate unused resources
Choose appropriate instance types
Use Spot Instances for flexible workloads

Summary

AWS provides a robust and scalable infrastructure platform. By following best practices and leveraging infrastructure as code, you can build reliable, secure, and cost-effective cloud applications.

Go for Cloud Development

Tue, 10 Jun 2025 00:00:00 +0000

Overview

Go (Golang) has emerged as a powerful language for cloud-native development, offering a unique combination of simplicity, performance, and built-in concurrency support. This chapter explores why Go is an excellent choice for building cloud applications and how to leverage its features effectively.

Why Choose Go?

1. Performance

Fast compilation and execution
Efficient memory usage
Native binary compilation
No runtime dependencies

2. Concurrency

Built-in goroutines for lightweight concurrency
Channels for safe communication between goroutines
Simple concurrency patterns
Efficient handling of multiple concurrent operations

3. Cloud-Native Features

Excellent HTTP/2 support
Native cloud SDK support
Container-friendly binaries
Great for microservices architecture

Getting Started with Go

Installation

# macOS
brew install go

# Linux
wget https://go.dev/dl/go1.21.linux-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.21.linux-amd64.tar.gz

Your First Cloud Service

package main

import (
 "fmt"
 "log"
 "net/http"
)

func main() {
 http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 fmt.Fprintf(w, "Hello, Cloud!")
 })
 
 log.Fatal(http.ListenAndServe(":8080", nil))
}

Best Practices

Error Handling: Always check and handle errors explicitly
Context Usage: Use context for cancellation and timeouts
Struct Tags: Leverage tags for JSON/XML marshalling
Interface Design: Keep interfaces small and focused
Testing: Write comprehensive unit and integration tests

Cloud Deployment

Containerization

FROM golang:1.21 AS builder
WORKDIR /app
COPY . .
RUN go build -o main .

FROM alpine:latest
COPY --from=builder /app/main /main
CMD ["/main"]

Kubernetes Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
 name: go-app
spec:
 replicas: 3
 selector:
 matchLabels:
 app: go-app
 template:
 metadata:
 labels:
 app: go-app
 spec:
 containers:
 - name: go-app
 image: your-registry/go-app:latest
 ports:
 - containerPort: 8080

Summary

Go provides an excellent foundation for cloud-native development with its simplicity, performance, and built-in concurrency features. Its growing ecosystem and strong community support make it an ideal choice for building scalable cloud applications.

Introduction to Cloud-First Development

Tue, 10 Jun 2025 00:00:00 +0000

Overview

In today’s rapidly evolving technological landscape, adopting a cloud-first approach has become essential for startups and businesses of all sizes. This chapter introduces the fundamental concepts of cloud-first development and explains why it’s crucial for building scalable, resilient systems.

What is Cloud-First Development?

Cloud-first development is a strategy that prioritizes cloud computing solutions over traditional on-premises infrastructure. It involves:

Building applications specifically for cloud environments
Leveraging cloud-native services and features
Embracing scalability and flexibility from day one
Focusing on rapid development and deployment

Why Cloud-First Matters for Startups

1. Cost Efficiency

Pay-as-you-go pricing models
Reduced upfront infrastructure costs
Automatic scaling based on demand
Lower maintenance overhead

2. Speed to Market

Rapid provisioning of resources
Automated deployment pipelines
Built-in development tools and services
Faster iteration cycles

3. Scalability

Horizontal and vertical scaling options
Global reach with minimal effort
Built-in redundancy and fault tolerance
Elastic infrastructure that grows with demand

Key Principles

Design for Failure: Assume components will fail and build resilience into your architecture
Automate Everything: From deployment to scaling to recovery
Use Managed Services: Leverage cloud provider services rather than managing infrastructure
Monitor and Observe: Implement comprehensive monitoring from day one
Security First: Build security into every layer of your application

Getting Started

The journey to cloud-first development begins with understanding your requirements and choosing the right cloud provider. In the following chapters, we’ll dive deeper into:

Responsive exponential backoff in Go

Sun, 13 Nov 2022 00:00:00 +0000

using exponentially scaling up and down the sleep time

Building machine learning models

Tue, 25 Dec 2018 00:00:00 +0000

using scala spark

Feature engineering for machine learning models

Thu, 06 Dec 2018 00:00:00 +0000

using scala spark

Learning Scala Spark basics

Sat, 24 Nov 2018 00:00:00 +0000

using spark shell in local

Migrating from http to https

Sat, 17 Nov 2018 00:00:00 +0000

using lets encrypt, certbot and configuring Nginx

Powerbot connecting real world to twitter

Sun, 06 May 2018 00:00:00 +0000

via Raspberry Pi using GPIO pins

Creating Base64 UUID in Java

Sun, 02 Apr 2017 00:00:00 +0000

Alphanumeric unique id using base64 charset

Documenting Play Framework using Swagger

Wed, 20 Jul 2016 00:00:00 +0000

Setting up live documentation for API

Creating REST API Specification

Wed, 30 Mar 2016 00:00:00 +0000

using Swagger Specification

Set up G-WAN web server

Tue, 23 Feb 2016 00:00:00 +0000

to serve static website

Scala code to access documents in AWS S3 bucket

Wed, 17 Feb 2016 00:00:00 +0000

via http get and put requests

Auto refresh Chrome when files modified

Mon, 15 Feb 2016 00:00:00 +0000

Using python pyinotify and chrome debugging

Salesforce Bulk API usage with an example

Sun, 07 Feb 2016 00:00:00 +0000

to show how to upsert records in batches.

Salesforce Rest API usage with an example

Sun, 07 Feb 2016 00:00:00 +0000

to show how to upsert records

Mounting external hard disk to Raspberry Pi

Sun, 31 Jan 2016 00:00:00 +0000

which contains NTFS and FAT file systems.

Raspberry Pi Benchmarking File IO

Sun, 31 Jan 2016 00:00:00 +0000

using sysbench, sd card and attached external hard disk

Cricket score in command line

Thu, 28 Jan 2016 00:00:00 +0000

using python and open cricscore api

Setting up a 4 node Raspberry Pi 2 Cluster

Mon, 18 Jan 2016 00:00:00 +0000

Setting up the right hardware.

Raspberry Pi 2 benchmarking

Mon, 11 Jan 2016 00:00:00 +0000

using sysbench and Java

Raspberry Pi 2 setup

Mon, 11 Jan 2016 00:00:00 +0000

from micro SD card to JDK installation.

Experiment with Raspberry Pi

Tue, 05 Jan 2016 00:00:00 +0000

How I turned it to a electricity monitor, tweetbot and downloader.

Crawlpod - open source scalable web crawler

Sat, 12 Dec 2015 00:00:00 +0000

built on top of Scala and Akka framework.

Listing S3 Top level folders

Wed, 09 Dec 2015 00:00:00 +0000

using simple Python code.

Efficiently using Enum in entity class

Mon, 24 Aug 2015 00:00:00 +0000

to improve code maintainability and database performance.

Couchbase setup on AWS

Fri, 24 Jul 2015 00:00:00 +0000

EC2 instances

Encryption and Decryption in Java

Tue, 21 Jul 2015 00:00:00 +0000

using a private key and AES algorithm.

Distributed forward proxy servers

Mon, 20 Jul 2015 00:00:00 +0000

to crawl Internet via multiple cloud instances.

Setup Elasticsearch cluster on AWS

Wed, 15 Jul 2015 00:00:00 +0000

EC2 instances.

Lines of code inversely proportional to readability

Tue, 07 Jul 2015 00:00:00 +0000

Always code less to make it easily readable.

Testing Spring Application using JUnit

Wed, 03 Jun 2015 00:00:00 +0000

How to test a Spring Application using JUnit? Explained with example test class.

Building a scalable recommendation engine

Sat, 30 May 2015 00:00:00 +0000

using play framework, couchbase and elasticsearch

sbt-run-support-210 not found

Fri, 24 Apr 2015 00:00:00 +0000

Fixing unresolved dependency in playframework.

Building a scalable distributed web crawler

Sat, 18 Apr 2015 00:00:00 +0000

which can perform both crawling and data extraction

How to create a modern blog?

Wed, 08 Apr 2015 00:00:00 +0000

using markdown and python

Git Configuration

Wed, 01 Apr 2015 00:00:00 +0000

Alias for generally used Git commands