Preparing for Installation › Prerequisites › CA Distributed Repository Access System (CA DRAS) Considerations

CA Distributed Repository Access System (CA DRAS) Considerations

You can calculate the number of concurrent users supported by a CA DRAS server connected to a CA View database based on the following formula:

For CA View 11.7

Solve for maxusers:

• Databases = number of CA View databases
• Data sets = (number of data file data sets(extents) for ALL CA View databases) + (number of data file data sets(extents) for ALL CA Deliver databases)
• maxusers = ((maximum available below-the-line storage – (databases * 1616) - (data sets * 528)) / 2424) and drop remainder

Based on the formula in the example:

Given four CA View databases, 134 View data sets (extents), 0 Deliver data sets(extents), and 8388608 bytes of maximum below-the-line storage, up to 3428 users per DRAS server can be supported.

For CA View 11.6 and Older

Note: All supported versions of CA View are supported by CA Output Management Web Viewer Version 12.0.

Solve for maxusers:

• Data sets = (number of index file data sets(extents) for largest CA View database) + (number of data file data sets(extents) for largest CA View database) + (number of data sets(extents) for largest CA Deliver database)
• usedbelowthelinestorage = ((((data sets + 81) / 41 and drop remainder) * 8192) + 1200) + ((data sets * 388)
• maxusers = ((maximum available below-the-line storage in bytes - 131072) / usedbelowthelinestorage) and drop remainder

The following is an example showing 12 Megabytes of free below the line storage:

• Data sets = (3) + (30) + (2) = 35
• usedbelowthelinestorage = ((((35 + 81) / 41 and drop remainder) * 8192) + 1200) + ((35 * 388) = 37957
• maxusers = ((12582912 - 131072) / 37957) and drop remainder = 328 users per DRAS server