System Programmer Reference › Customizing CA VM:Backup › Customizing the CA VM:Backup Directory Entry › USER Statement › Virtual Storage

Virtual Storage

The minimum recommended virtual storage for running the CA VM:Backup service virtual machine is 128M. You might need to increase this virtual storage size if you perform any of the following activities on your CA VM:Backup service virtual machine:

• Run backup jobs that specify multiple tape streams
• Run restore jobs that involve an extremely large number of files
• Run multiple backup and restore jobs concurrently
• Interface CA VM:Backup with CA VM:Archiver
• Back up and restore BFS data
• Back up file spaces that contain many entities (for example, files and directories)

If you increase virtual storage size, round up the current value to 256M, 512M, or 1024M as appropriate. Increasing the virtual storage will not affect performance, because CA VM:Backup uses storage only as needed and does not consume more virtual storage simply because it is available.

CA VM:Backup releases its free-storage pages when idle. Therefore, little real storage and a negligible amount of paging storage are used when the product is idle.