Quote: use file snapshot and record append for producer-consumer queues and many-way merging; minimizes synchronization overhead; record append at-least-once at a known offset

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Our files are often used as producer-consumer queues … file. Atomicity with minimal synchronization overhead is essential. … GFS has snapshot and record append operations. Snapshot … multiple clients to append data to the same … multi-way merge results and producer-consumer queues that many … be invaluable in building large distributed applications. … [p. 5] A record append causes data (the "record") … offset of GFS's choosing.   Google-1   Google-2

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