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The dead simple, done right, distributed file system.
License: MIT License
This project forked from kyleterry/tripled
The dead simple, done right, distributed file system.
License: MIT License
Introduction: This is a very simple distributed file system borrowing many ideas from GFS. The idea is to focus on simplicity and performance. Not availability or fault tolerance (at all). Triple D: 1) Dead simple... 2) Done right... 3) Distributed file system Why: Tired of bullshit configurations and degraded performance? Want good performance? How about usable and understandable code? Requirements: zeromq-2.1.7 redis-2.2.7 Usage: master.py -- run on metadata master node worker.py -- run on worker nodes cptoddd.py -- use to copy files into TripleD cpfromddd.py -- use to copy files out of TripleD lsddd.py -- use to list files in TripleD Design: 1) Master handles all metadata 2) Workers are dumb trusting writes from clients 3) Clients do RPC with master and workers directly 4) Metadata comes from master, flows via client to workers 5) Assume write once, read many in future; no append; no seek 6) Client allowed to arbitrarily chunk (client knows best!) 7) No replication right now; client would get list from master 8) No multi-reading or multi-writing... 9) All workers store chunks in the same path on their system 10) Dumb round-robin assignment of chunks; worst case first node gets more data; last node gets least data 11) Variable-sized chunks allowed 12) No delete or rewrite TODO: 1) master should only write into Redis on receipt of write info from a worker 2) concurrent writing to multiple nodes, reading from multi nodes (readahead as well)---basically add threading with push/pull sockets Legal: TripleD is licensed under the MIT license.
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