Скачать или смотреть The Google File System Explained

Explore the architecture and design of the Google File System (GFS)! GFS is a scalable distributed file system built by Google for large, data-intensive applications, designed to store huge, multi-GB files reliably using commodity hardware.

Learn how GFS operates within a cluster consisting of a single Master, multiple ChunkServers, and Clients. We detail how GFS breaks files into fixed-size 64 MB chunks, which is significantly larger than typical filesystem block sizes. The system is heavily optimized for high throughput, handling large streaming reads and sequential writes that typically append data to files.

We cover the essential APIs, including standard file operations (create, delete, read, write). Discover GFS's special operations like Snapshot, which creates an efficient copy of a file or directory tree, and the atomic Record Append, allowing multiple clients to concurrently append data to the same file.

Understand GFS’s fault tolerance mechanisms, primarily achieved through chunk replication (default three replicas) across different racks, and fast recovery using replicated operation logs and checkpointing. We also examine how ChunkServers use checksumming to detect and prevent stored data corruption, ensuring data integrity.

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