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What amount of memory is used for DPU Resident Individuals in DPU/SCU controller

Issue

What amount of memory is used for DPU Resident Individuals in DPU\SCU controller?

Product Line

TAC I/NET

Environment

  • I/NET Seven - Access control
  • DPU7910A, DPU7920, DPU7920 w/DPU48K and SCU1284

Cause

Need to understand the memory allocation and implications of using DPU Resident settings with both the DPU or SCU hardware devices.

Resolution

To set the Individual as DPU Resident the DPU Res. checkbox needs to be checked in the Individuals editor as shown below (red box) shown below.

 

In the table below from TCON300 05/17 Chapter 9-14 shows the memory allocation for a 7910A DPU or DPU7920

If you have a selection of between 6000 to 12000 Resident User Individuals (i.e. set as DPU Resident) in the system you can ONLY have between 3262 to 2887 Cached users respectively stored within a properly communicating system.  If the DPU is offline to the Sub LAN Interface (SLI) these cached users will be reduced as the requirement for the DPU storage capacity will need to store 'offline' messages as shown under the "Messages" column.  

 

In the table below from TCON300 05/17 Chapter 9-15  shows the memory allocation for a SCU1284 DPU or DPU7920 w/DPU48K

If you have a selection of between 6000 to 12000 Resident Users Individuals (i.e. set as DPU Resident) in the system you can have the full quota of 48,000 Cache Users respectively stored within a properly communicating system.  Unlike the DPU7910 or 7920 if the DPU is offline to the Sub LAN Interface (SLI) there is no changed to these cached users and there is more 'offline' message storage as shown under the "Messages" column.

For further information on DPU Caching and memory management read from Chapter 9-11 in TCON300-05/17

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