Read sequence diagram

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Client->MetadataServer: {open, FileName, [Mode]} %Filename is the fullpath
activate MetadataServer
note right of MetadataServer: getFileHandle
MetadataServer->Client: {ok,FileID} / {error,Reason}
deactivate MetadataServer
loop read_chunks

Client->MetadataServer: {seekchunk,FileID,ChunkNo}
activate MetadataServer
note right of MetadataServer: seekChunk
MetadataServer->Client: {ok,ChunkID,NodeList} | {error,Reason}
deactivate MetadataServer

Client->DataServer: {readchunk, ChunkID, NodeID, Offset, Length}
activate DataServer
DataServer->Client: gen_tcp:connect
DataServer->Client: gen_tcp:receive
DataServer->Client: {tcp, Socket, Binary}
DataServer->Client: {tcp_closed, Socket}
DataServer->Client: {finish, State}
deactivate DataServer
end

Client->MetadataServer: {close}

Original issue reported on code.google.com by huangxia...@gmail.com on 16 Dec 2008 at 7:09

Attachments:

• [read sequence.png](https://storage.googleapis.com/google-code-attachments/egfs/issue-2/comment-0/read sequence.png)

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Original comment by huangxia...@gmail.com on 16 Dec 2008 at 7:16

• Changed state: Accepted
• Added labels: Priority-Medium, Type-Other
• Removed labels: Read, Sequence

[GoogleCodeExporter]

Original comment by huangxia...@gmail.com on 16 Dec 2008 at 7:18

• Changed state: Invalid