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Blogs

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OpenSearch Workload Management (WLM) for heavy search queries

Srivatsa RV

SRE @One2N

OpenSearch Workload Management puts heavy report queries and product search in separate workload groups with CPU, memory, timeout and shard limits.

September 10, 2026 | 6 min read

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How to evaluate AI SRE agents for production?

Hemant Kumar

Staff SRE @One2N

How we evaluate AI SRE agents before they touch a production incident, applied to an OpenSRE v0.1 PoC and scored on how fast it helps isolate a fault.

August 11, 2026 | 12 min read

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Conway's Law as a lever to fix legacy architectures

Chinmay Naik

CEO @One2N

Conway's law says architecture mirrors team communication. A shared policy database showed it; the Reverse Conway Maneuver helps refactor legacy systems.

July 8, 2026 | 6 min read

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How one parameter stalled Postgres replication with Debezium for 3 weeks

Harsh Mishra

SRE

A story about WAL segments, missing events, and the one line of SQL that should have been there from the start.

April 28, 2026 | 7 min read

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Spring Kafka batching: how we shot ourselves in the foot

Mahesh Aravind

SDE @One2N

Spring Kafka batch listeners cost us non-blocking retries for a small throughput gain. How listener batching differs from producer batching, and the fix.

March 16, 2026 | 4 min read

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Why your Architecture should start with Questions, not boxes

Chinmay Naik

CEO @One2N

Architecture should start with questions about volume, SLAs, budget, team skills and growth before anyone draws Kafka and microservices boxes on a diagram.

March 5, 2026 | 4 min read

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GitOps for Kafka: how we governed 78 clusters without breaking production

Harshwardhan Mehrotra

SRE @One2N

Spandan Ghosh

Content @One2N

GitOps for Kafka with Jikkou: how a small platform team governed 78 clusters, 10,000+ topics and Kafka 0.8.2 to 4.x, replacing 3 to 5 day topic tickets.

February 16, 2026 | 4 min read

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Prayogshala: the engineering laboratory at One2N

Chinmay Naik

CEO @One2N

Prayogshala is One2N's internal engineering lab, where engineers build real-world POCs with Principal SRE mentorship and learn to ask why before how.

February 2, 2026 | 4 min read

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The gotchas of OTel Collector processors in Kubernetes

Sanket Rajgiri

SRE @One2N

Spandan Ghosh

Content @One2N

OTel Collector processor gotchas in Kubernetes: batching to stop 429s, crashes in spikes, noise filters, k8s enrichment, sampling and two-tier collectors.

January 26, 2026 | 6 min read

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What happens when you run Terraform commands?

Sahil Joseph

Staff SRE @One2N

Saurabh Hirani

Principal SRE @One2N

What happens when you run Terraform commands: how Terraform core talks to provider plugins over gRPC, credential handling, state locking and debugging.

September 24, 2025 | 7 min read

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DORA metrics: useful or fluff

Jaideep Khandelwal

CTO @One2N

DORA metrics without context invite Goodhart's Law gaming. One team shipped 2,500 deploys a month with long lead times. How to tie DORA to business goals.

September 3, 2025 | 14 min read

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How we solved a critical site-to-site VPN IP address conflict in AWS

Rishiraj Rathore

SRE @One2N

Spandan Ghosh

Content @One2N

A site-to-site VPN in AWS came up but every request timed out: both sides used 10.0.0.0/22. Why a secondary CIDR failed and the parallel setup that worked.

July 15, 2025 | 7 min read

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DARE to question your alerts?

Saurabh Hirani

Principal SRE @One2N

Alert fatigue grows when alerts are set and forgotten. DARE adds alerts per unit time to RED metrics, with fixes like muting CPU alerts during backups.

June 25, 2025 | 3 min read

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Implementing secure error handling in Go for B2B SaaS applications

Mohit Kumar

Software Engineer

Jaideep Khandelwal

CTO @One2N

Secure error handling in Go microservices: a centralized error library replaced leaky stack traces and DB errors with structured, user-friendly responses.

June 18, 2025 | 5 min read

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Optimizing MongoDB backup strategy: lessons from achieving a 1-Hour RPO

Mihir Bhagwat

SRE @One2N

Sanket Rajgiri

SRE @One2N

Spandan Ghosh

Content @One2N

MongoDB backup strategy for a 1-hour RPO on GKE with the Community Operator: daily mongodump full dumps and hourly oplog backups for point-in-time restore.

May 14, 2025 | 8 min read

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EKS upgrade best practices: how to upgrade EKS clusters safely

Aashi Rathore

SRE @One2N

Spandan Ghosh

Content @One2N

EKS upgrade checklist from our v1.23 to v1.30 move: control plane checks, VPC CNI, CoreDNS and kube-proxy add-ons, Velero backups and node group upgrades.

March 25, 2025 | 5 min read

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Gotchas to avoid when using AWS spot instances in production

Aashi Rathore

SRE @One2N

Spandan Ghosh

Content @One2N

AWS spot instances in production on EKS: two-minute termination notices, ignored PodDisruptionBudgets, slow replacement capacity and a real outage we had.

February 24, 2025 | 4 min read

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Using UTM and Vagrant for dev environments on Apple Silicon

Srivatsa RV

SRE @One2N

Spandan Ghosh

Content @One2N

VirtualBox no longer supports M-series Macs. How to run Vagrant with UTM to spin up reproducible local dev environments on Apple Silicon, tested on an M3.

December 2, 2024 | 5 min read

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How to use multiple GitHub accounts on one machine

Saurabh Hirani

Principal SRE @One2N

Use multiple GitHub accounts on one machine: a separate SSH key per account, SSH host entries, and includeIf in your Git config to pick the right identity.

August 5, 2024 | 3 min read

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Database schema migrations: a practical guide to managing schema changes

Spandan Ghosh

Content @One2N

Database schema migrations without manual steps: versioned migrations, running them in every deploy, and tools like Flyway, Liquibase and ORM migrations.

April 25, 2024 | 5 min read

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Making your Go CLI binaries self-updatable

Sitaram Shelke

SRE

Make Go CLI binaries self-updatable without brew or apt: fetch the latest release, download the binary for the OS and architecture, and apply the update.

January 25, 2024 | 8 min read

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Exposing SaaS APIs privately to customers with AWS PrivateLink

Siddharth Mishra

SRE

Expose SaaS API endpoints privately with AWS PrivateLink, not VPC peering, which breaks on overlapping CIDRs. Same-region latency fell from 0.21s to 0.08s.

December 25, 2023 | 5 min read

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Routing sensitive logs to Syslog server with Log4j2 appender

Hrithik Sawant

SDE

Routing sensitive logs to a Syslog server using Log4j2 appender: a simple, centralized configuration approach to securely manage high-volume application logs.

November 25, 2023 | 2 min read

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Mock API in microservices architecture

Kalpesh Deo

Staff software engineer-II @One2N

Mock APIs in microservices architecture: why running every dependent service locally slows developers down, and how mocks unblock local dev and testing.

June 22, 2022 | 5 min read

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Terraform: best practices & gotchas

Siddharth Shashikar

SRE @One2N

Terraform best practices and gotchas for infrastructure as code: directory structure, module organisation, naming conventions and state management.

May 27, 2022 | 10 min read

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Homogenous build setups for local and CI workflows

Sitaram Shelke

SRE

Homogenous build setups give local and CI one interface to build and test. How we used Makefiles and Bash with Jenkins so builds match everywhere.

March 10, 2022 | 3 min read

Read Blog

Iptables, Firewalls, Linux blast from the past!

Jaideep Khandelwal

CTO @One2N

An iptables guide for SREs: syntax, tables, chains and targets on Netfilter, plus using a machine as a NAT device and resolving NAT IPs across VLANs.

February 17, 2022 | 4 min read

Talks

Watch Talk

Platform Engineering Strategy: Scaling from 5 to 500 Engineers | One2N Bits Ep. 6

Jaideep Khandelwal

CTO @One2N

Srivatsa RV

SRE @One2N

When do you actually need a platform team? Srivatsa and Jaideep break down platform engineering from first principles: culture, org size, and adoption.

March 20, 2026 | 34 min

Watch Talk

The implications of AI in the SRE world | One2N Bits Ep.5

Jaideep Khandelwal

CTO @One2N

Saurabh Hirani

Principal SRE @One2N

Saurabh Hirani and Jaideep Khandelwal break down what it takes for AI to be genuinely useful in SRE, beyond incident bots and code completion.

January 5, 2026 | 15 min

Watch Talk

AWS Outage: Real Costs & Disaster Recovery | One2N Bits Ep.4

Jaideep Khandelwal

CTO @One2N

Srivatsa RV

SRE @One2N

Srivatsa and Jaideep break down disaster recovery after a real AWS outage: RTO, RPO, the economics of DR setups, and what cloud promises don't cover.

November 18, 2025 | 19 min

Watch Talk

UNIX Philosophy for Modern Engineers | Command Line Heroes

Chinmay Naik

CEO @One2N

Command Line Heroes kicks off with real-world stories, hands-on terminal challenges, and a geek-out session for developers, SREs, and CLI enthusiasts.

August 23, 2025 | 21 min

Watch Talk

Avoid overengineering & big ball of mud 7 lessons for maintaining the balance

Chinmay Naik

CEO @One2N

Seven lessons for staying between over-engineering and a big ball of mud, building software for today that can still scale for tomorrow.

April 1, 2024 | 28 min

Watch Talk

Growing your career with open source - FOSS Overflow

Chinmay Naik

CEO @One2N

For recent grads and new engineers: how to get started with open source, think about career growth and why the soft parts of software matter.

December 16, 2023 | 25 min

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