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Recursive remote files Description Cascade of recursive submodels in distributed architecture: The same model is compiled and run in a cascade of submodels on different machines/nodes. Compilation is local to the nodes, that is, nodes may use different versions of Xpress. From a given instance, data files at the parent and at the child node are accessed. This model requires write access on all machines that are used.
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remotefiles.mos (!******************************************************* Mosel Example Problems ====================== file remotefiles.mos ```````````````````` Cascade of recursive submodels in distributed architecture The same model is compiled and run in a cascade of submodels on different machines/nodes. Compilation is local to the nodes, that is, nodes may use different versions of Xpress. From a given instance, data files at the parent and at the child node are accessed. This model requires write access on all machines that are used. Before running this model, you need to set up the array NODES with machine names/addresses of your local network. All nodes that are used need to have Xpress installed and suitably licensed, and the server "xprmsrv" must have been started on these machines. (c) 2010 Fair Isaac Corporation author: S. Heipcke, May 2010 *******************************************************!) model "Accessing remote files" uses "mmjobs", "mmsystem" parameters NUM=0 end-parameters declarations MAXNUM = 3 R = 1..MAXNUM NODES: array(R) of string NodeNum: integer NodeName: string NodeInfo: text moselCnct: Mosel rmtMod: Model end-declarations !!! Set the entries of this array to local machines in your network, !!! using machine names, or IP addresses. !!! Each instance needs to be on a different machine. !!! Names may include the working directory to be used for writing, e.g.: !!! remote Unix machine: "somename|MOSEL_CWD=/tmp" !!! remote Windows machine: "xsrv:somename|MOSEL_CWD=c:\\mydir\\" NODES::(1..MAXNUM)["a","b","c"] ! Display and write out information about the current node NodeInfo:= " "*NUM + "Level " + text(NUM) + ". Node: " + text(getparam("NODENUMBER")) + " " + text(getsysinfo(SYS_NODE)) + ". " initialisations to "nodeinfo.dat" evaluation of getparam("NODENUMBER") as "NodeNum" evaluation of getsysinfo(SYS_NODE) as "NodeName" end-initialisations if NUM<MAXNUM then ! Start a new instance of Mosel on a remote node if connect(moselCnct, NODES(NUM+1))<>0 then exit(2); end-if ! Compile (from source at the root node to memory) if compile("","rmt:remotefiles.mos","remotefiles.bim")<>0 then exit(1) end-if ! Load this model in the remote Mosel instance load(moselCnct, rmtMod, "rmt:[-1]remotefiles.bim") fdelete("remotefiles.bim") ! Recursively call this model again and wait for its termination run(rmtMod, "NUM=" + (NUM+1)) wait dropnextevent end-if ! Access a file at the parent node if NUM>0 then initialisations from "rmt:[-1]nodeinfo.dat" NodeNum NodeName end-initialisations NodeInfo += "Parent node: " + text(NodeNum) + " " + NodeName + ". " else NodeInfo += "Root node. " end-if ! Access a file at the descendant node if NUM<MAXNUM then DescNum:= getid(moselCnct) initialisations from "rmt:[" + DescNum + "]nodeinfo.dat" NodeNum NodeName end-initialisations NodeInfo += "Child node: " + text(NodeNum) + " " + NodeName + ". " fdelete("rmt:[" + DescNum + "]nodeinfo.dat") ! Cleaning up else NodeInfo += "Leaf node." end-if ! Write out all the information we have collected about this node writeln(NodeInfo) ! Cleaning up locally at the end if NUM=0 then fdelete("nodeinfo.dat") end-if end-model | |||||||||||
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