Our current customer is looking to upgrade their SCADA or switch to Ignition, however they are reluctant to change PC/Server topologies (although depending on this, it may be required).
Current they run 2 PC’s redundantly. The SCADA software they use now simply stores historical data in flat files on the PC. When the master goes down, the secondary takes over. When the master comes back up it resumes control but also back-fills its historical data with what the secondary had logged while it was down.
I apologise because I have not had time to play with this and try things. It appears Ignition would not do this natively.
I’ve ‘heard’/seen examples of mysql being setup mirrored/redundantly in a master-master setup that would seem to accomplish this, however I’m afraid it may be a maintenance nightmare.
Obviously the goal is to have the system not require constant maintenance for this. Does anyone have any experience here ?? Is this even possible to do without being a maintenance nightmare. ?
Again I do believe they ‘might’ be willing to change the topology and have the database be on another machine, which could fall to their IT department to backup etc. As it stands now they like NOT having IT having anything to do with their SCADA.
Thanks in advance ,