适用场景全新升级！扩展 Dragonfly2 作为分布式缓存系统架构 原创

pkg/rpc/dfdaemon/dfdaemon.proto

// Daemon Client RPC Service
service Daemon{
  // Trigger client to download file
  rpc Download(DownRequest) returns(stream DownResult);
  // Get piece tasks from other peers
  rpc GetPieceTasks(base.PieceTaskRequest)returns(base.PiecePacket);
  // Check daemon health
  rpc CheckHealth(google.protobuf.Empty)returns(google.protobuf.Empty);
}

service Daemon { 
// Check if given task exists in P2P cache system
rpc StatTask(StatTaskRequest) returns(google.protobuf.Empty);
// Import the given file into P2P cache system
rpc ImportTask(ImportTaskRequest) returns(google.protobuf.Empty);
// Export or download file from P2P cache system
rpc ExportTask(ExportTaskRequest) returns(google.protobuf.Empty);
// Delete file from P2P cache system
rpc DeleteTask(DeleteTaskRequest) returns(google.protobuf.Empty);
}

// Scheduler System RPC Service
service Scheduler{
// RegisterPeerTask registers a peer into one task.
rpc RegisterPeerTask(PeerTaskRequest)returns(RegisterResult);

// ReportPieceResult reports piece results and receives peer packets.
// when migrating to another scheduler,
// it will send the last piece result to the new scheduler.
rpc ReportPieceResult(stream PieceResult)returns(stream PeerPacket);

// ReportPeerResult reports downloading result for the peer task.
rpc ReportPeerResult(PeerResult)returns(google.protobuf.Empty);

// LeaveTask makes the peer leaving from scheduling overlay for the task.
rpc LeaveTask(PeerTarget)returns(google.protobuf.Empty);
}

// Scheduler System RPC Service
service Scheduler{
// Checks if any peer has the given task
rpc StatTask(StatTaskRequest)returns(Task);
// A peer announces that it has the announced task to other peers
rpc AnnounceTask(AnnounceTaskRequest) returns(google.protobuf.Empty);
}

- add a file into cache system
dfcache import --cid sha256:xxxxxx --tag testtag /path/to/file

- check if a file exists in cache system
dfcache stat --cid testid --local # only check local cache
dfcache stat --cid testid # check other peers as well

- export/download a file from cache system
dfcache export --cid testid -O /path/to/output

- delete a file from cache system, both local cache and P2P network
dfcache delete -i testid -t testtag

# dd if=/dev/urandom of=testfile bs=1M count =1024
# dfcache stat -i testid # 检查一个不存在的文件
# dfcache import -i testid testfile

# on another node
# dfcache stat -i testid
# dfcache export -i testid testfile.export