LUDOC-297 protocol: Update protocol document

[doc/protocol.git] / rpc.txt

diff --git a/rpc.txt b/rpc.txt
new file mode 100644 (file)
index 0000000..e620fde
--- /dev/null
+++ b/rpc.txt
@@ -0,0 +1,12 @@
+RPC
+~~~
+
+The most common activity in the Lustre protocol is for a client to
+initiate a Remote Procedure Call (RPC) directed at a specific
+target. There are two additional activities supported by the Lustre
+protocol. A server may initiate an RPC to the target on another
+server, such as an MDS RPC to the MGS for configuration data, or an
+RPC to an OST to update the MDS's state with available space
+data. Finally, in a "call-back" RPC the service side (where the target
+resides) initiates the RPC, which may be directed at a client or
+another server.