Experimental Fuse FS which uses Cassandra as the store. Works with OSX Fuse installed with homebrew. PR to support more operating systems and setups are gladly accepted.
$ cmake .
$ make
Currently it's hardcoded to use keyspace cqlfs and connect to 127.0.0.1.
$ cqlsh < schema.cql
$ cqlsh < bootstrap.cql
$ ./cqlfs /mnt/blah
These are in no particular order.
- Figure out reasonable caching scheme (invalidate caches using some queue? Kafka?)
- Test multi-threading properly
- Add tests
- Add performance tests
- Test mounting from several places and see how that works.
- Configuration options for keyspace name, hosts, etc.
- Support stats (disk used, disk free, etc.)
- File handle support
- Error handling
- CQL consistency handling
- Speedup writes
- Support write caching
- Make writes even more asynchronous
- Access control
Q: Why does this exist?
A: Mainly to experiment with Fuse and to create a naive implementation of FS that uses Cassandra. It has been a topic for long in the cassandra user mailing list and this is there to just test how it can be done.
Q: What is it good for?
A: That is still to be seen.
Q: Why C++?
A: It seemed like a good idea because of native linking and stuff. In retrospect, this wasn't a smartest move because certain things are a bit more painful in C++ than in Java/Scala for example.
Q: Is it fast?
A: Actually it's the slowest FS I have seen in my life. See TODO.
Q: Can I put it in production?
A: Well, you can. If you are crazy.