🌅 Wednesday Morning — System Architecture English

Good morning! Today we explore the language of System Architecture and Cloud Design — the vocabulary that senior engineers, tech leads, and solution architects use every day. Whether you’re in a design review, writing an RFC, or interviewing for a senior role, this language will help you communicate with clarity and confidence.

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🔤 Word of the Day: Scalability

Word	scalability
IPA	/ˌskeɪ.ləˈbɪl.ɪ.ti/
Part of Speech	noun
Vietnamese	khả năng mở rộng quy mô

📖 What does it mean in architecture?

Scalability is the ability of a system to handle increased workload — more users, more data, more requests — by adding resources, either vertically (more powerful hardware) or horizontally (more instances/nodes). A scalable system grows gracefully without needing a full redesign.

🔑 Two key types:

• Vertical scaling (scale up) — upgrade CPU/RAM on existing servers
• Horizontal scaling (scale out) — add more servers/replicas

✅ Example Sentences

1. “One of the core requirements for this system is scalability — we expect 10x traffic growth over the next 18 months.”
2. “The monolith has poor scalability because the entire application must be deployed as a single unit.”
3. “By moving to a microservices architecture, we significantly improved the scalability of each individual service.”

🔗 Resources

• 📖 Cambridge Dictionary: scalability
• 🎧 YouGlish (hear native speakers): scalability on YouGlish
• 📺 ByteByteGo – System Design basics: https://www.youtube.com/@ByteByteGo

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📋 Vocabulary Table: System Architecture Essentials

Phrase	Vietnamese	Example Sentence
fault tolerance	khả năng chịu lỗi	“We designed the system for fault tolerance — a single node failure won’t take down the whole cluster.”
load balancer	bộ cân bằng tải	“The load balancer distributes incoming requests evenly across all healthy instances.”
bottleneck	điểm nghẽn cổ chai	“Profiling revealed that the database was the main bottleneck under high concurrency.”
service mesh	lưới dịch vụ	“We adopted a service mesh to handle service-to-service authentication and observability at scale.”
eventual consistency	nhất quán dần dần	“In a distributed system, we accept eventual consistency to gain higher availability.”

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🗣️ Pronunciation Guide

Breaking Down “Scalability”

Let’s go syllable by syllable:

sca  -  la  -  bil  -  i  -  ty
/skeɪ/ - /lə/ - /bɪl/ - /ɪ/ - /ti/

• sca → sounds like “SKAY” (rhymes with “day”)
• la → short, unstressed → “luh”
• bil → like “bill” (the bird 🦆)
• i → short “ih”
• ty → like “tee”

🎯 Full word stress lands on -bil-: ska-lə-BIL-ɪ-tee

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🔊 Practice Sentence — Read Aloud 3 Times

“Our new microservices architecture dramatically improves scalability, but we need to address fault tolerance before the production launch.”

Tips as you read:

• Stress -BIL- in scalability
• Stress FAULT in fault tolerance
• Use a confident, measured pace — this is meeting-room English!

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✏️ Exercise 1: Fill in the Blank

Choose the correct word: bottleneck / load balancer / scalability / fault tolerance / eventual consistency

1. The team decided to put a ________ in front of the API servers to distribute traffic evenly.
2. After the incident, we added redundant nodes to improve ________ — no single point of failure should crash the service.
3. As the app’s user base grows, ________ becomes the most critical non-functional requirement.
4. The slow database query was the ________ causing timeouts across multiple services.
5. In our distributed cache, we chose ________ because strong consistency would hurt write performance too much.

✅ Click to reveal answers

1. load balancer
2. fault tolerance
3. scalability
4. bottleneck
5. eventual consistency

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✏️ Exercise 2: Translate into English

Translate these sentences from Vietnamese to English, using today’s vocabulary:

1. “Kiến trúc monolith của chúng ta đang trở thành điểm nghẽn cổ chai khi lưu lượng tăng.”
2. “Chúng ta cần thiết kế hệ thống với khả năng chịu lỗi tốt hơn trước khi ra mắt.”
3. “Bộ cân bằng tải sẽ phân phối các request đến tất cả các instance đang hoạt động.”

✅ Click to reveal sample answers

1. “Our monolith architecture is becoming a bottleneck as traffic increases.”
2. “We need to design the system with better fault tolerance before the launch.”
3. “The load balancer will distribute requests across all active instances.”

💡 Your wording may differ — focus on using the vocabulary naturally!

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💡 Idiom of the Day: “Put all your eggs in one basket”

Idiom	put all your eggs in one basket
Vietnamese	bỏ tất cả trứng vào một giỏ (không nên đặt cược tất cả vào một thứ)
In architecture	Relying on a single server, region, or vendor with no redundancy

Examples in Context

1. “Hosting everything in a single availability zone is like putting all your eggs in one basket — one outage and you’re down completely.”
2. “We diversified our cloud provider strategy because we didn’t want to put all our eggs in one basket with a single vendor.”

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📺 Recommended Watching

Level up your architecture English with these channels:

Channel	Why Watch	Link
ByteByteGo	Visual system design explanations — great vocabulary in context	youtube.com/@ByteByteGo
Fireship	Fast-paced, modern takes on cloud and architecture concepts	youtube.com/@Fireship
Tech With Tim	Cloud architecture tutorials with clear English explanations	youtube.com/@TechWithTim

🎯 Tip: Watch 1 ByteByteGo video today and write down 3 new architecture terms you hear. Look them up in Cambridge Dictionary!

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🏋️ Today’s Challenge

One tiny action to practice right now:

📝 Open your notes app and write 2 sentences describing a system you’re currently building or have worked on — using at least 2 words from today’s vocabulary table.

Example: “The current API has a scalability problem because it’s hosted on a single server without a load balancer.”

Share it with a teammate or your tech lead in your next standup. Speaking architecture English in real meetings is the fastest way to improve! 🚀

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📊 Today’s Summary

Item	Details
🔤 Word of the Day	scalability /ˌskeɪ.ləˈbɪl.ɪ.ti/
📋 Vocabulary	fault tolerance, load balancer, bottleneck, service mesh, eventual consistency
💡 Idiom	“put all your eggs in one basket”
🗣️ Practice Sentence	microservices / scalability / fault tolerance
⏱ Estimated Time	~20 minutes

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Keep building — in code and in English! See you at the noon session. 🌤️