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Case Studies

Cover image for the case study Homogeneous Monitoring across Cloud and On-premise.

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Homogeneous Monitoring across Cloud and On-premise.
How One2N set up homogeneous observability across multi-cloud and on-premise data centers, standardizing monitoring and reducing cloud costs.

Blogs

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 one parameter stalled Postgres replication with Debezium for 3 weeks

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How one parameter stalled Postgres replication with Debezium for 3 weeks
Portrait of Harsh Mishra, SRE

Harsh Mishra

SRE

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

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 Error budget calculation: downtime minutes for every SLO

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Error budget calculation: downtime minutes for every SLO
Portrait of Srivatsa RV, SRE at One2N

Srivatsa RV

SRE @One2N

Error budget calculation from your SLO: 99.9% over 30 days is 43 minutes of downtime, 99.95% is 21m 54s. Use burn rate to decide when to ship or pause.

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 SRE math every engineer should know: a practical guide

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SRE math every engineer should know: a practical guide
Portrait of Srivatsa RV, SRE at One2N

Srivatsa RV

SRE @One2N

SRE math for on-call engineers: percentiles that averages hide, Little's Law, error budgets as downtime minutes, queueing theory and honest graph reading.

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.

Talks

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

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Avoid overengineering & big ball of mud 7 lessons for maintaining the balance
Portrait of Chinmay Naik, CEO at One2N

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.

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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