--- title: Best Programming Digest posts — June 2025 | daily.dev description: The most upvoted Programming Digest posts from June 2025, curated by the daily.dev community. canonical: https://daily.dev/sources/programmingdigest/best-of/2025/06 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/programmingdigest/best-of/2025/06 og:type: website og:site_name: daily.dev og:title: Best Programming Digest posts — June 2025 | daily.dev og:description: The most upvoted Programming Digest posts from June 2025, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Programming Digest — June 2025 1. 1 [](https://daily.dev/posts/how-databases-store-your-tables-on-disk-n8toreoui "How Databases Store Your Tables on Disk") Article Programming Digest · 1y How Databases Store Your Tables on Disk Databases store tables using a hierarchical structure of pages and heap files. Data is organized in fixed-size pages (typically 8KB-16KB) that contain multiple rows, with databases reading entire pages rather than individual rows for efficiency. Tables are stored in heap files where pages can be unordered, making full table scans expensive. Indexes solve this by creating separate B-tree structures that point to specific pages in the heap, dramatically reducing I/O operations. Clustered indexes physically organize table data based on the index key, with databases like MySQL's InnoDB storing all tables as clustered indexes by default. The choice of primary key affects performance significantly, as random values like UUIDs can cause page splits and fragmentation. 213 6 2. 2 [](https://daily.dev/posts/everything-i-know-about-good-system-design-w50majvf7 "Everything I know about good system design") Article Programming Digest · 1y Everything I know about good system design System design is about assembling services using primitives like databases, caches, and queues. Good design looks underwhelming and focuses on minimizing stateful components, using databases effectively with proper indexing, handling slow operations through background jobs, implementing strategic caching, and designing for failure with retries and circuit breakers. The key is using boring, well-tested components correctly rather than clever tricks. 43 [See all Programming Digest archives](/sources/programmingdigest/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/programmingdigest/best-of/2025/06#page","url":"https://daily.dev/sources/programmingdigest/best-of/2025/06","name":"Best Programming Digest Posts — June 2025","description":"The most upvoted Programming Digest posts from June 2025, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/programmingdigest/best-of/2025/06#items","numberOfItems":2,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/how-databases-store-your-tables-on-disk-n8toreoui","name":"How Databases Store Your Tables on Disk"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/everything-i-know-about-good-system-design-w50majvf7","name":"Everything I know about good system design"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Sources","item":"https://daily.dev/sources"},{"@type":"ListItem","position":3,"name":"Programming Digest","item":"https://daily.dev/sources/programmingdigest"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/sources/programmingdigest/best-of"},{"@type":"ListItem","position":5,"name":"June 2025"}]}]} ```