Hardware Recommendations

The hardware recommendations are given in terms of CPUs, memory and disk space.

Number of CPUs

Please consult the following table, where n = (number of concurrent exams you wish to perform):

n # CPUs
1-50 1
50-100 2-3
100-200 3-4
200+ 4+

RAM

The required memory by GLaDOS can be calculated by the following formula:

Total Memory = (maximum number of running daemons)*(32MB) + 120MB
             + (number of concurrent exams you wish to perform)*(5MB) + 240MB
             + 1000MB

  • Each daemon needs roughly 32MB of unshared memory. The amount of shared memory is approximately 120MB.

  • Each event stream or agent needs roughly 5MB of unshared memory. The amount of shared memory is approximately 240MB.

Storage

The amount of disk storage needed by GLaDOS highly depends on various parameters:

  • How long you wish to keep backups.

  • How many data do students produce on average during an exam.

  • How long an average exam will take.

  • The setting of Remote Backup Path.

  • The setting of the screenshots interval.

  • Whether you activate Screen Capturing or not.

Make sure that there is enough disk storage for your needs.