Apr 3 · 9 min read · It is 4:47 PM on a Friday. You merged a pull request, the CI pipeline passed, and the deployment to production completed without errors. But then the Slack messages start: "Is the app down?" "I'm getting a 500 error." "The checkout page is broken." Y...
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Dec 31, 2025 · 10 min read · Welcome back! 👋 Day 52 of the 100 Days Cloud DevOps Challenge, and today we're mastering Kubernetes Rollbacks! This is production survival skill - quickly reverting bad deployments to restore service. Let's recover! 🎯 🎯 The Mission - Emergency Rol...
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Dec 25, 2025 · 5 min read · Transactions are the mechanism that ensures data integrity: they guarantee that a series of database operations either all succeed or all fail (Atomicity). In Entity Framework Core (EF Core), transaction management ranges from fully automatic to high...
Join discussionDec 12, 2025 · 4 min read · ⭐ Introduction As a Data Analyst or Data Engineer, writing SELECT queries is the easy part — the real responsibility begins when you modify data using UPDATE or DELETE statements. One wrong WHERE clause…One missing condition…One accidental full-table...
Join discussionSep 16, 2025 · 3 min read · Branches: Keeping the Main Copy Clean The idea of branches is straightforward: The main branch (in most repos now called main) is the stable copy of the project. Developers create separate branches to work on new features or sprint-specific changes w...
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Jul 10, 2025 · 4 min read · I tried implementing a mini in-memory key-value data store that supports transactions, rollback, and commit — just to see how databases handle these operations under the hood. Turns out, it’s a fascinating journey of layers, reversibility, and data i...
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May 27, 2025 · 1 min read · Transaction কী? Transaction এর মাধ্যমে একাধিক ডাটাবেইস অপারেশন একসাথে execute হয়, এবং সবগুলো সফল হলে তবেই ডাটাবেজে স্থায়ীভাবে save হয়। যদি কোনো একটি অপারেশন fail করে, তাহলে সবকিছু rollback হয়ে যায় — অর্থাৎ, কোনো ডেটা চেঞ্জই হয় না। উদাহরণ: ধরো তুমি এ...
Join discussionMar 3, 2025 · 7 min read · Advance Package Management In this lesson, we will learn about the packages installation using dnf and rpm command. And will perform the activities like- Installation of package, deletion, updation, checking all the details of a package (when it got ...
Join discussionFeb 9, 2025 · 4 min read · In a recent blog post, I made a passing comment about using Git's "dry run" option when cleaning up untracked files. That suggestion wasn't random - it stems from some hard lessons learned over the years. The kind of lessons that make you develop a h...
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Sep 25, 2024 · 3 min read · When managing Service Control Policies (SCPs) in production-level, mission-critical AWS environments, it's vital to ensure that policy changes don't inadvertently disrupt workflows or lock your teams out of critical systems. To achieve this, integrat...
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