If we want to add a new RPC with a new opcode are there any guidlines to be followed in the Lustre File System. Also , 1)How does the MDS process the ptlrpc_request i.e how does the MDS extract the buffer information from the ptlrpc_message. 2)For every new RPC is the message length which is to be sent on wire ( including the fixed header size + the buffer size) dependent on the number of buffers in the lustre request message i.e the count field in the ptlrpc_prep_req() or the size of the size[] array. Thanks, Vilobh *Graduate Research Associate Department of Computer Science The Ohio State University Columbus Ohio* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-devel/attachments/20101012/a78d2cc2/attachment.html