systemdr

Weekly deep-dives into database internals — storage, ACID, indexes, distributed systems. One production concept per issue + working code in the vault. For engin

[systemdr @SystemDR1]

Your RAG chatbot gives confident, wrong answers?

Production RAG in 5 steps:
1. Overlapping chunks + source/page
2. Vector + keyword search in parallel
3. Merge, rerank, keep top 5
4. Answer only from context, cite it
5. Weak retrieval? Say "I don't know"

#RAG #AIEngineering

[systemdr @SystemDR1]

Master PyTorch: tensors, autograd & training loops

Free System Design eBook: https://t.co/2tytu7zbDt
Course: https://t.co/8p6v0c1DkO

[systemdr @SystemDR1]

PHP CVE-2026-109618: multipart → OOM → longjmp with half-built state → shutdown RCE.

Patch: 8.2.35 / 8.3.36 / 8.4.27 / 8.5.12 👇 #PHP #AppSec

[systemdr @SystemDR1]

Azure Service Bus Tutorial with .NET: Queues, Topics, Backpressure & Dead-Letter Queues

[systemdr @SystemDR1]

https://t.co/j3Znm0cwfc

[systemdr @SystemDR1]

Coding agent = while loop. Skills = process. MCP = tools. Worktrees = isolation.

Without those three, two agents in one checkout go to war. #AIAgents #MCP

[systemdr @SystemDR1]

Build one yourself, full tutorial: https://t.co/5BZqVMTbXt
More hands-on AI & system design: https://t.co/r8d9Lk0JE9

[systemdr @SystemDR1]

Your RAG chatbot gives confident, wrong answers?

Production RAG in 5 steps:
1. Overlapping chunks + source/page
2. Vector + keyword search in parallel
3. Merge, rerank, keep top 5
4. Answer only from context, cite it
5. Weak retrieval? Say "I don't know"

#RAG #AIEngineering

[systemdr @SystemDR1]

Spin up PostgreSQL & hit your first psql prompt #SQL

[systemdr @SystemDR1]

three enterprise customers. one platform. zero isolation. that's how outages become breaches.
we build tenant isolation + quotas + sso + billing — hands-on, day 106-110 of our system design course.
website: https://t.co/8xTmdqOmoL
#multitenant #systemdesign #saasarchitecture

[systemdr @SystemDR1]

Install Claude Code & ship your first AI edit in 3 hours.
Reply: Course: [course link] | Free System Design eBook: [eBook link] #ClaudeCode

[systemdr @SystemDR1]

.NET Aspire Observability: Serilog, OpenTelemetry & Distributed Tracing
Course Introduction: https://t.co/F7AQXQ3N1u Complete Curriculum — 45 Posts: https://t.co/xltgYVG84k

[systemdr @SystemDR1]

Your KV store loses every key on restart. Fix it with a WAL

[systemdr @SystemDR1]

Visit our Website : https://t.co/8xTmdqNOzd Course Link : https://t.co/DCWM3EaxGv Curriculum: https://t.co/dc16DAtv62
Hands On Kubernetes Course.

[systemdr @SystemDR1]

Debug Java microservices with Micrometer & OpenTelemetry
🎁 https://t.co/2tytu7zbDt
🎓 https://t.co/I2jNjuit9l

[systemdr @SystemDR1]

Build a 5-Agent RAG Pipeline: Hybrid Search, Reranking & Critic Agent

Course overview: https://t.co/1ph4n1quaW

[systemdr @SystemDR1]

Master NumPy, tensors & calculus for AI. Build 5 apps #AI

[systemdr @SystemDR1]

@arpit_bhayani @nobrokercom Country popular for offering services has worsf customer service for citizens.
You buy a product and it becomes your headache, Even bigshot companies don't take responsibility of it.
Imangine brand new car delivered on day one with fault indicator. @VW

[systemdr @SystemDR1]

Model Users, Tweets & Follows in SQL | System Design

[systemdr @SystemDR1]

AI Reliability Engineering: Make Your AI System Production-Ready in 90 Days
Course overview: https://t.co/1ph4n1pWlo

[systemdr @SystemDR1]

Learn Python in 35 days: 4 modules, zero to production 🐍