Scalable System Design: Vertical vs. Horizontal Scaling Explained

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The chapter explains that scalability is a core quality attribute, distinct from performance, that ensures systems keep working well as users, data, and devices grow. It outlines several scalability types, including user, data, geographic, organizational, function, and infrastructure scalability. Two main strategies are compared: vertical scaling, which upgrades a single server's hardware but faces physical limits and single points of failure, and horizontal scaling, which adds more servers to grow nearly without limit while improving availability. Modern cloud-native systems, containers, Kubernetes, and microservices are presented as examples that rely on horizontal scaling, often combined with vertical scaling where appropriate.

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Method for diffing large 834 enrollment files without crashing Excel

Working with enrollment files that run to hundreds of megabytes can freeze Notepad++ or cause Excel to truncate data, which makes routine month-over-month comparisons hard. The article proposes a member-level approach: split each file into member records at INS segments, build a stable key per member, and store a hash and file offset for each. Streaming the new file against that index classifies members as added, unchanged, changed, or possibly termed while keeping memory tied to member count rather than file size. It also warns that full and change 834 files must be treated differently, since an absent member means termination in one but not the other. A small free command-line tool, x12diff, is presented as an implementation that detects the file type from BGN08.

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ProgrammingDEV Community ·

Cursor AI can receive your workspace folder path before any tool runs

A new Cursor chat can be given the absolute path of the opened workspace folder, even before the agent opens any file. Parent directory names may reveal details such as a local account name, a client relationship, or business activity. Cursor staff confirmed this in a November 12, 2026 forum reply, noting that project-specific directories under the user's home folder can also enter context. Knowing a location does not grant permission to read it, and .cursorignore only controls indexing rather than acting as a data-loss-prevention control. The article advises checking what a fresh chat reveals, reviewing the chat context, and renaming or relocating folders whose names leak sensitive details.

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ProgrammingDEV Community ·

OpenID4VCI 1.0 Final Errata, 1.1 Draft and Server-to-Server Specs Diverge in Late 2026

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ProgrammingDEV Community ·

Cómo construir un agente de IA con Google ADK

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