Planning for Multiple Residency

When you plan for multiple residency on a computer, consider the following factors:

• Storage space

  Each database server must have its own unique storage space. You cannot use the same disk space for more than one instance of a database server. When you prepare an additional database server, you need to repeat some of the planning that you did to install the first database server. For example, you need to consider these questions:

  • Will you use buffered or unbuffered files? Will the unbuffered files share a disk partition with another application? (For more information on buffered and unbuffered files, see Direct Disk Access.)
  • Will you use mirroring? Where will the mirrors reside?
  • Where will the message log reside?
  • Can you dedicate a tape drive to this database server for its logical logs?
  • What kind of backups will you perform?
• Memory

  Each database server has its own memory. Can your computer handle the memory usage that an additional database server requires?

The following sections present the steps to create an additional database server, or multiple residency, on your computer.