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CHARON-VAX model | Minimal number of CPU cores | Recommended number of CPU cores |
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VAX 6610 | 2 | 4 |
VAX 6620 | 3 | 4 |
VAX 6630 | 4 | 6 |
VAX 6640 | 6 | 8 |
VAX 6650 | 8 | 12 |
VAX 6660 | 8 | 12 |
| Other models | 2 | 2 |
When starting, the CHARON-VAX software checks the available number of host CPU cores. Currently, this check is based on the maximum number of VAX CPUs that can be emulated, not on the number of the actually configured VAX CPUs. Therefore the number of host CPU cores recommended for the maximum number of emulated CPUs - as shown in the right column of the table above - must be available. If the available number of host CPU cores is below this number, CHARON-VAX will issue a warning message even if the requirements for the configured number of VAX CPUs are fulfilled. The CHARON-VAX software will work despite this warning if the requirements for the configured number of VAX CPUs are fulfilled.
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Hyper-threading must be switched off completely. Disable hyper-threading in the BIOS settings of the physical host or, for a VMware virtual machine, edit the virtual machine properties, select the Resources tab then select Advanced CPU. Set the Hyper-threaded Core Sharing mode to None. |
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It is also possible to leave several licenses available to CHARON-VAX at the same time but in this case they have to be specified in the configuration file. Example:
It is also possible to have one "main" and one "backup" license in case the main license becomes unavailable:
CHARON-VAX checks its licenses from time to time starting with main license. If it becomes unavailable, it attempts to access the backup license. |
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