Grokking the System Design Interview, Volume II
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GFS and Chubby

BigTable does not build its own storage system or its own locking service. It depends on two other Google systems for both, GFS and Chubby. This lesson looks at how the two fit in.

GFS

GFS, the Google File System, is a scalable, distributed file system Google built for large, data-intensive applications like BigTable.

GFS breaks every file into fixed-size blocks called Chunks. It stores each Chunk on a data server called a ChunkServer. A GFS master manages the metadata. Clients go to the master for that, but every data transfer happens directly between the client and the ChunkServers.

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