HP 3000 Manuals HP 3000 Manuals
Chapter 8 Building the HP Desk Databases Before you can run HP Desk, you must create the Local and Global Databases which HP Desk uses to hold details of the computer(s), the Directory of users, and users' data. The initial creation of databases of a suitable size for your installation, based on estimates of expected usage, is explained in this chapter. The actual creation must be performed using the HP Desk Configurator.
NOTE You can create a Native Database to hold users' names in non-USASCII form only if you have a 16-bit (Asian language) version of HP Desk.
Later you must fill these databases with data - a task known as configuration - which is explained in Chapter 9 . Although it is difficult to accurately predict how much disk space your databases will take up until you try to build them, you should ensure that before you start your disk does have a reasonable amount of unfragmented vacant space. To create the databases, you use the Configurator's Create Database option. You then work through a number of screen forms to size the databases before HP Desk builds them. At each of these screens, you type the values you want or accept the initial values presented to you. As you do this, HP Desk calculates the amount of space you are likely to require for those values and displays these totals for your approval. Once you have decided on the capacity values for elements of the databases, the Configurator calculates values for a number of datasets, the three most important being: Item-Header, Item-Structure, and Item-Content. All HP Desk items, such as users, messages, and folders are built up from these data sets.
NOTE The maximum size of a complete mail item can be set when configuring HP Desk, in the Local Control Data screen.
The performance of HP Desk is optimized when these datasets are less than 70% full, (in particular, the Item-Header data set) so try to ensure that there's some spare capacity in them from the start. Check that these totals fit with the amount of free disk space on your system. You can go back and change any value; HP Desk will recalculate the total space required and display it for you. When you're satisfied that the databases will be the correct size to meet your needs, you build the databases. HP Desk builds the databases using the DBSCHEMA and DBUTIL IMAGE database utilities.
NOTE Once you've built the databases, if you decide they need expanding before you've entered any data into them, you must use the Configurator to re-create the databases at a different size. (Use the Create Database option again).
Once the databases actually hold data--whether from configuration or from actual use of HP Desk--you can expand them using the Configurator's Expand Database option. Since the expansion process destroys and re-creates the databases you must first unload the contents of the databases to a backup tape to preserve the existing data. Otherwise, the expansion procedure is identical to creation. see Chapter 18 for details.