The source code is in myafs/server.cc

• rpc_fetch: Returns the data of the specified file or creates a new file, and returns it with its size.
• rpc_store: Stores a given data in the specified file.
• rpc_getFileStat: Returns the stats of the file specified.
• rpc_listDir: Returns the contents of the specified directory.
• rpc_rmdir: Removes the specified directory(if present)
• rpc_unlink: Removes a specified file(if present)
• rpc_mkdir:Creates a directory at the specified path

The source code is in myafs/client.cc The client supports the following POSIX APIs:

• open()
• close()
• creat()
• unlink()
• mkdir()
• rmdir()
• read()
• write()
• pread()
• pwrite()
• stat()
• fsync()

The project uses Cmake.

Building is handled via Cmake and needs it installed on the machine.

Once in the myafs folder

mkdir -p cmake/build cd cmake/build cmake -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$MY_INSTALL_DIR ../.. make -j 20

Server: myafs/server <server_data_directory>

Client: myafs/client -d <cache_directory> <mount_directory>

Implementation Locations:

• 1.1 POSIX Compliance: client.cc
  
  

• 1.2 AFS Protocol and Semantics

  • Whole File Caching:
    • myafs/client.cc: myafs_open() (Line 70), myafs_read() (line 153), myafs_write(Line 166), myafs_release (Line 260), myafs_create(Line 305), myafs_unlink (Line 339)
  • Flush on close:
    • myafs/client.cc: myafs_release() (Line 260), myafs_write(Line 166), client_helper.h: afsfuse_store()(Line 76)
  • Last writer wins:
    • myafs/client.cc: myafs_release() (Line 260)
  • Stale Cache:
    • myafs/client.cc: myafs_open() (Line 70)
      
      

• 1.3 Durability: Server Side Persistence

  • myafs/server.cc: rpc_store(Line 84)
    
    

• 1.4 Crash Recovery Protocol

  • Client Side Crash Recovery
    • myafs/client.cc: myafs_init()(Line 412), createPendingFile()(Line 218), deletePendingFile()(Line 242), retryRelease(Line 366), myafs_release() (Line 260)
  • Server Side Crash Recovery:
    • myafs/server.cc: rpc_store(Line 84)
      
      

All other aspects covered in the report and the presentation. Thank you!