HP 3000 Manuals HP 3000 Manuals
Defining Links Between Computers Offset from GMT The offset from GMT (Greenwich Mean Time) allows for date and time stamps to be displayed to suit the time zone of your computer. Without the offset being applied, if your system resides in San Francisco and you receive mail from New York, a message could be received on your system at 7 AM and be time stamped at 9 AM - which would not yet exist! Number of Trucks Required The numbers of Master Trucks sending messages to a particular remote computer - and Slave Trucks receiving from it - will usually be either 1 or 2. A Master Truck delivers to one mailnode at a time, and activates only one Slave Truck at a time. Therefore, if only one remote mailnode is configured, you only need one Master Truck. There's no point having more Master Trucks than remote mailnodes. A value greater than 1 is mainly recommended if you wish to allow concurrent transmissions to more than one mailnode accessed via the remote computer, though volume of mail could be another reason for configuring a higher value. A high number of Master Trucks require a correspondingly high MPE job limit to allow them all to run. Similarly, the number of Slave Trucks that can log on will be determined by the MPE session limit.
NOTE It is possible to run up to 36 NS Master Trucks. It is also possible to run up to 36 NS Slave Trucks, and you can set these limits both in the Configurator or in Batch Configuration.
Chapter 12 has full details of the NS/DS Computer screens you use in the Configurator to set the limits for Master Trucks and Slave Trucks. If the number of Master Trucks is zero, it means that you can never transmit to the remote computer. If there are no Slave Trucks, it means that you can never receive mail from that computer. If you change the number of sending or receiving trucks configured while HP Desk is running, the number of trucks actually running is not adjusted until the next MAILON operator command is issued after a MAILOFF command. Data Compression If you are a user of HP DeskManagerPLUS you can specify that data be compressed before it is transmitted over the link from one computer to another, provided that the receiving computer also has HP DeskManagerPLUS installed. This provides the opportunity to reduce your line utilization and consequently your data communications costs. Over a period of time the use of the data compression option in a typical HP Desk network could result in a sizable reduction of data volume. However, the gains in terms of reduced transmission costs must be balanced against the additional CPU requirement of the Master Truck and NS Slave Truck programs, and any resulting impact on system performance.
NOTE The compression option is available for connections to NS computers, and therefore cannot be used when communicating with versions of HP Desk prior to version B.05.00.
Computer Availability This is defined as the times at which mail can be transmitted from this computer to a particular remote computer. The 24-hour day is divided into 15-minute time slots. You can also define what class of mail can be transmitted in each time slot. This can be either urgent mail only, normal and urgent mail, or any class of mail. When there is mail waiting to be transmitted to a remote mailnode, an MPE file is created for that mailnode at the next specified 15-minute slot. In general, the availability you specify here should correspond to the times when the external transport system is running. As long as the network link is open and the Slave Trucks are running on the remote computer, mail can be transmitted at any time. If you want to restrict availability, agreement should be reached between you and the Administrator at the remote computer. You should first obtain from the remote site, details of times when the remote computer will be available to accept messages from your computer. Where necessary, convert these times to your local time. You can restrict your transmission times to suit your installation, as long as your times are within the agreed availability times. A high degree of control over when messages are transmitted can be achieved by considering both computer availability and route priority together.