PostgreSQL Query Rewriting Techniques The previous articles in this series covered performance problems you fix by adding indexes, restructuring joins, or tuning memory. This one is about the queries where the plan is "fine" — every node is doing something reasonable — but the query itself is asking the wrong question, producing unnecessarily large intermediate results or forcing the planner dow
บทนำ (Introduction) ในฐานะนักพัฒนา เรามักจะหลงใหลในวิธีการที่แพลตฟอร์มระดับโลกจัดการกับการแพร่ภาพมัลติมีเดียจำนวนมหาศาล VKontakte (VK.com) ซึ่งเป็นเครือข่ายโซเชียลที่ใหญ่ที่สุดในยุโรปตะวันออก ไม่ได้เป็นเพียงแค่แอปพลิเคชันโซเชียลทั่วไป แต่ในมุมมองทางวิศวกรรม มันคือหนึ่งในระบบ Content Delivery Network (CDN) ที่ก้าวหน้าที่สุด โดยใช้การสตรีมแบบ Adaptive Bitrate (ABR) และกลยุทธ์ความปลอดภัยที่เข้มงวดเ
В мире современной веб-разработки задача «просто скачать видео» превратилась в сложный инженерный квест. Социальные сети, такие как VK (ВКонтакте), давно отошли от прямой отдачи MP4-файлов, внедрив адаптивные протоколы потоковой передачи, динамическую генерацию токенов и механизмы защиты от ботов. VK Video Downloader. Мы обсудим реверс-инжиниринг API, работу с HLS/DASH, обход TLS-фингерпринтинга и
SQL is widely known for data querying and manipulation but systems do grow; data becomes larger; processes become repetitive and operations become sensitive. SQL has some features which enables it to be considered a fully fledged programming language. Some of the features which I discuss in this article are procedures, functions and transactions. Each of these concepts serve distinct purposes. Sto
Hi 👋, In this post we shall explore Bedrock's structured KB with this architecture: Upload CSVs to S3 > SNS Queue > Crawl data with Glue > Query with Redshift > Bedrock KB > Query with LLM. Let's do some of this with code. Let's get started. Clone the repo and switch to the project directory. git clone [email protected]:networkandcode/networkandcode.github.io.git cd structured-kb-demo/ Do a uv sync
Subqueries vs. CTEs in SQL: A Practical Guide to Writing Cleaner, Smarter Queries Whether you're just getting comfortable with SQL or leveling up your data skills, two tools will come up again and again when working with complex queries: subqueries and Common Table Expressions (CTEs). They solve similar problems — breaking a complex query into manageable pieces — but they do it in different ways
Di ekosistem media sosial global, VK (VKontakte) berdiri sebagai raksasa dengan infrastruktur pengiriman konten yang sangat canggih. Bagi pengguna biasa, menonton video hanyalah masalah klik "play". Namun, bagi kita sebagai pengembang, ada lapisan protokol rumit yang bekerja di balik layar untuk melindungi konten tersebut dari pengunduhan langsung. VK Video Downloader, sebuah alat yang mampu menem
Introduzione Come sviluppatori, siamo spesso affascinati da come le piattaforme su scala globale gestiscano e distribuiscano volumi massicci di dati multimediali. VKontakte (VK.com), il più grande social network dell'Europa orientale, è molto più di una semplice app sociale; dal punto di vista ingegneristico, è uno dei Content Delivery Network (CDN) più avanzati al mondo, che utilizza lo streami