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When using multiple Frappe sites in development, bench use <site> only changes the default site. It does not assign a separate port.

Stop bench start, then run each site in a separate terminal:

bench --site erp.pie16.com serve --port 8000
bench --site test.local serve --port 8001

Open the sites at:


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View counters overwhelmed the database. Write-behind + batching fixed it. But the same pattern would lose user accounts.


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A high-throughput event ingestion and stream-processing platform — edge, messaging, storage, and tracing, read as one system.0. What this system is

At its core this is a pipeline that takes an HTTP event at the edge, deduplicates it before it costs anything downstream, pushes it through Kafka as a schema-governed Avro record, aggregates it into rolling one-minute wind...


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Chapter 3From Golden Signals to Root Cause — How Modern Engineers Debug Distributed Systems

It is 2:17 AM.

Your phone vibrates.

A PagerDuty notification flashes across the screen:

🚨 Critical Alert: Checkout Service — P95 Latency has exceeded the threshold for the last 5 minutes.

Customers are reporting slow checkouts...


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Part of the Spark Explained in 60 Seconds series


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