Does anyone know the requirements for CitectSCADA in Virtualized Environment, how may VCores,ram, ...
Does anyone know the requirements for CitectSCADA in Virtualized Environment, how may VCores,ram, ...
It would be similar to the requirements for a physical server which are listed in the installation guide PDF on the Citect install disc. If you're just doing development or testing, you can probably get away with less. I often run my development/test VMs with 2 or 3 GB RAM and 1 or 2 cores so that I can easily run multiple VMs on my laptop for testing Citect networking and redundancy. You wouldn't want to do that with production servers. If you're not sure of the actual requirements of your project, you can start with the minimum requirements from the guide for your size project. As long as the physical host server still has more capacity, you can always allocate more cores, memory, or storage space to the VM if it is not performing well enough.
You can use Windows Performance Monitor to see how much memory (Memory\Available MBytes) is available while Citect is running for a couple days (it will go up and down as trend and other buffers fill and get dumped to disk). It's also a good idea for Citect to use 33% or less of the available CPU time (Processor\% Processor Time). That way there is more capacity to handle startups, shutdowns, connection of multiple clients, browsing trends, etc. You should also monitor disk usage in PerfMon. I believe Microsoft recommends that Physical Disk\Average Disk Queue Length should be 0.2 or less during normal running of the server. It will be much higher as Citect is starting up.
You may have to enable performance counters in the VM configuration.
