PowerPoint PresentationSlide 3Slide 4Slide 5Simplified Architecture of a PVM ProgramDistributed Programming with Parallel Virtual MachinesParallel Programming using PVM(Parallel Virtual Machines)Douglas Moore10 November 2003CS 775 – Distributed SystemsDistributed Programming with Parallel Virtual MachinesPVM – Parallel Virtual MachinesA set of software tools (libraries) for making efficient use of a cluster (networked) of computersPresents the developer with ability to address networked computers as a single virtual machine in order to execute computational tasksHeterogeneous architecture not required(But requires more care in setup and makefile (aimk) configuration)Distributed Programming with Parallel Virtual MachinesCategories of operations supportedProcess Management and ControlMessage Packing and SendingMessage Unpacking and ReceivingMessage Buffer ManagementTask SignalingInformation and Utility FunctionsGroup OperationsDistributed Programming with Parallel Virtual MachinesProcess Management and Controlpvm_spawnpvm_killpvm_exitpvm_addhostspvm_delhostspvm_haltMeans by which processes are created, assigned to hosts, exited, and killedHosts may be added or deleted from PVM at runtimePVM execution stopped by pvm_haltDistributed Programming with Parallel Virtual MachinesMessage Packing, Sending, Unpacking, Receiving, and Buffer ManagementMay use XDR when passing between hosts with incompatible formats May also use Raw data to send in format native to sending machineSender does not wait for acknowledgmentMessage buffered at receiving end until receivedPVM reliably delivers messages (if destination exists)Message order from each sender to each receiver is preservedPVM Interface hides socket programming detailsDistributed Programming with Parallel Virtual MachinesSimplified Architecture of a PVM ProgramTCP SocketsDataPack routines Send bufferPVM Send routinesDataPVM unpack routinesReceive bufferPVM Receive routinesDataPack routines Send bufferPVM Send routinesDataPVM unpack routinesReceive bufferPVM Receive routinesPVMD List of managed tasksPvm task id 1Pvm task id 2Pvm task id 3PVMD List of managed tasksPvm task id 100Pvm task id 102Pvm task id 103UDP SocketsTCP Sockets TCP SocketsA
View Full Document
Unlocking...