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Case Studies

Cover image for the case study Migrating Monolith Application to Cloud Native Stack.

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Migrating Monolith Application to Cloud Native Stack.
Case study: One2N migrates a hospital management SaaS platform serving 800+ B2B customers to a cloud native stack for scale and lower cost.

Blogs

Illustration on a navy background of a terminal running exec 3<>/dev/tcp/host/443, cabled into a network socket, next to a dashed folder labelled /dev/tcp that does not exist

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How to test TCP connectivity without curl using bash /dev/tcp
Portrait of Saurabh Hirani, Principal SRE at One2N

Saurabh Hirani

Principal SRE @One2N

No curl, wget or nc on a locked-down box? Use bash /dev/tcp to check if a port is open and read HTTP endpoints, and learn why it fails in zsh.

Cover illustration for OpenSearch Workload Management (WLM) for heavy search queries

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OpenSearch Workload Management (WLM) for heavy search queries
Portrait of Srivatsa RV, SRE at One2N

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.

Cover illustration for How to evaluate AI SRE agents for production?

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How to evaluate AI SRE agents for production?
Portrait of Hemant Kumar, Staff SRE at One2N

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.

Cover illustration for The gotchas of OTel Collector processors in Kubernetes

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The gotchas of OTel Collector processors in Kubernetes
Portrait of Sanket Rajgiri, SRE at One2N

Sanket Rajgiri

SRE @One2N

Portrait of Spandan Ghosh, Content at 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.

Cover illustration for How to read SRE graphs without lying to yourself

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How to read SRE graphs without lying to yourself
Portrait of One2N, Team

One2N

Team

How to read SRE graphs honestly: averages that hide pain, sampling windows that erase spikes, log scales and heatmaps, plus a checklist for incidents.

Cover illustration for Percentiles in SRE: Why averages lie about latency

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Percentiles in SRE: Why averages lie about latency
Portrait of Srivatsa RV, SRE at One2N

Srivatsa RV

SRE @One2N

Portrait of Spandan Ghosh, Content at One2N

Spandan Ghosh

Content @One2N

Percentiles in SRE: 50 slow requests in 1,000 can leave average latency near 200 ms. How p50, p95 and p99 expose tail latency and which ones to monitor.

Cover illustration for DORA metrics: useful or fluff

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DORA metrics: useful or fluff
Portrait of Jaideep Khandelwal, CTO at One2N

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.

Cover illustration for A pragmatic guide to get started with OpenTelemetry

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A pragmatic guide to get started with OpenTelemetry
Portrait of Spandan Ghosh, Content at One2N

Spandan Ghosh

Content @One2N

A pragmatic OpenTelemetry guide for SREs: monitoring vs observability, logs, metrics and traces, OTel instrumentation, and strategies to migrate backends.

Cover illustration for DARE to question your alerts?

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DARE to question your alerts?
Portrait of Saurabh Hirani, Principal SRE at One2N

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.

Cover illustration for Alerting with GitOps: automating Elasticsearch alerts

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Alerting with GitOps: automating Elasticsearch alerts
Portrait of Srivatsa RV, SRE at One2N

Srivatsa RV

SRE @One2N

Automating Elasticsearch alerts with GitOps: we replaced manual 30-minute dashboard checks on the ELK stack with alert definitions a NOC team can act on.

Cover illustration for Setting up CloudWatch alerts for EKS clusters: insights and solutions

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Setting up CloudWatch alerts for EKS clusters: insights and solutions
Portrait of Mihir Bhagwat, SRE at One2N

Mihir Bhagwat

SRE @One2N

Portrait of Saurabh Hirani, Principal SRE at One2N

Saurabh Hirani

Principal SRE @One2N

Portrait of Spandan Ghosh, Content at One2N

Spandan Ghosh

Content @One2N

CloudWatch alerts for EKS node readiness with Container Insights: per-node alarms for static nodes, then Metric Insights and MIN(MIN) for autoscaled ones.

Cover illustration for Routing sensitive logs to Syslog server with Log4j2 appender

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Routing sensitive logs to Syslog server with Log4j2 appender
Portrait of Hrithik Sawant, SDE

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.

Cover illustration for Kubernetes HPA on external metrics with Prometheus Adapter

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Kubernetes HPA on external metrics with Prometheus Adapter
Portrait of Akshay Srivastava, SRE at One2N

Akshay Srivastava

SRE @One2N

Kubernetes HPA on external metrics: scaling pods on Redis queues from a server outside the cluster with Prometheus Adapter, plus CPU and memory metrics.

Cover illustration for Mock API in microservices architecture

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Mock API in microservices architecture
Portrait of Kalpesh Deo, Staff software engineer-II at One2N

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.

Talks

Thumbnail for the talk Using LLMs to Improve Incident Response Times | mitramandal.ai - 2025

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Using LLMs to Improve Incident Response Times | mitramandal.ai - 2025
Portrait of Jaideep Khandelwal, CTO at One2N

Jaideep Khandelwal

CTO @One2N

A talk from mitramandal.ai, One2N's AI meetup, on using LLMs to improve incident response times in real engineering workflows.

Thumbnail for the talk DORA Metrics or Theatrics? What to Measure, What to Ignore, and How to Improve | One2N Bits Ep. 2

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DORA Metrics or Theatrics? What to Measure, What to Ignore, and How to Improve | One2N Bits Ep. 2
Portrait of Jaideep Khandelwal, CTO at One2N

Jaideep Khandelwal

CTO @One2N

Portrait of Chinmay Naik, CEO at One2N

Chinmay Naik

CEO @One2N

Chinmay and Jaideep on DORA metrics: what they are, when they matter, and how to use deployment frequency and recovery time without measurement theater.

Thumbnail for the talk Monitoring the Future: Insights from VictoriaMetrics with Aliaksandr Valialkin

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Monitoring the Future: Insights from VictoriaMetrics with Aliaksandr Valialkin
Portrait of Chinmay Naik, CEO at One2N

Chinmay Naik

CEO @One2N

Chinmay Naik and Aliaksandr Valialkin, co-founder of VictoriaMetrics, discuss scaling monitoring systems and the future of cloud-native observability.

Thumbnail for the talk Lessons Learned managing a Terabyte scale database for three nines of uptime

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Lessons Learned managing a Terabyte scale database for three nines of uptime
Portrait of Chinmay Naik, CEO at One2N

Chinmay Naik

CEO @One2N

Chinmay Naik shares lessons from managing a terabyte-scale MySQL database for three nines of uptime, delivered at RootConf SREConf, November 2023.

Thumbnail for the talk FMEAs of the Distributed Systems before going live on Production

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FMEAs of the Distributed Systems before going live on Production
Portrait of Jaideep Khandelwal, CTO at One2N

Jaideep Khandelwal

CTO @One2N

A talk by Jaideep Khandelwal about performing Failure Modes and Effects Analysis of Distributed Systems before deploying them on production.

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