21CTO

Aug 16, 2022 · Backend Development

Mastering Fast File Uploads: Instant Transfer, Chunked Upload, and Resume Techniques

This article explains how to achieve efficient large‑file uploads by using instant (MD5‑based) transfer, chunked uploading, and breakpoint resume, detailing the underlying Redis logic, server‑side Java implementations with RandomAccessFile and MappedByteBuffer, and practical deployment considerations such as file servers and OSS.