Chapter 3 System PreparationHPSS Installation Guide September 2002 165Release 4.5, Revision 2This syntax is identical to DCE’s RPC_RESTRICTED_PORTS environment variable. Only thencacn_ip_tcp[start_port-end_port] (TCP component) is used so the ncadg_ip_udp componentmay be omitted.Additional options are available for controlling the size of the PFTP transfer buffers, TransferBuffer Size, and the buffer size for the sockets in the PDATA_ONLY protocol, Socket Buffer Size.The value may be specified as a decimal number (1048576) or in the format: xMB.The PFTP parallel protocol opens and closes the sockets between the PFTP Client child processesand the Mover(s). The default value for tape was every 512 MB and for disk was the smaller of thesize of 64 storage segments or 512 MB. With transfers increasing in performance into the 100MB/sec and greater range, the opening and closing of sockets is another performance problem. TheMAX Ptran Size = value substanza has been provided to allow for larger transfers between socketopen and closing.NOTE: in the case of disks, the 64 storage segments is still the overriding specification, so StorageClasses need careful specification to provide very large segments if the value associated with MAXPtran Size is large. An artificial limit of 250 GB is compiled into the PFTP Client, which should notcause a great concern any time in the near future. Even at 1 GB/sec, this is several minutes! Thevalue may be specified as a decimal number (4294967296) or in the format: xGB.PFTP Client Stanza Example:PFTP Client = {; Set Default Class of ServiceDEFAULT COS = 2; Set Default ProtocolProtocol = PDATA_AND_MOVER; Set Minimum File Size for auto mapping Non-parallel; commands to Parallel commandsAuto Parallel Size = 4MB; Set the Port Range for Port Restrictions on Parallel Transfers; Only the port range for ncacn_ip_tcp is parsed.; The syntax has been taken from DCE.PortRange = ncadg_ip_udp[10100-12100]:ncadg_ip_tcp[10100-12100]; PDATA OptionsTransfer Buffer Size = 1MBSocket Buffer Size = 16MB; PFTP sets an Artificial (Compiled in) Maximum of 250GBMAX Ptran Size = 10GB}3.7.1.2 PFTP Client Interfaces StanzaMany systems have multiple interfaces, some of which may not have access to all destination hosts.The PFTP Client Interfaces stanza is used to specify which interfaces on the source host should beused to communicate to destination Parallel FTP Daemons and/or HPSS Movers. This is
