• Replies 8 replies
  • Subscribers 581 subscribers
  • Views 362 views
  • Users 0 members are here
Options
Related

CitectSCADA and VMWare snapshot backup

Patrice

Hello everyone,

We are using CitectSCADA 2016 with two redundant servers. Each server is running in a virtual machine (VMWare). Everything works fine except that sometimes (about once or twice a week), the backup server takes control for a few seconds (the IODevices switch to the standby) and then the go back to the primary server. Since this always happens between 22h30 and 23h00, we are trying to find what causes this.

After discussing with our IT department which manage the servers, they do a backup of the VM machines at about those times everyday by doing a "snapshot" of the virtual machine. We are wondering if this could cause a "glitch" on the primary server when this backup is made, which would cause the standby server to not see it for a short period of time and take control.

Has anyone had any similar experiences with VMWare, are there any "best practices" concerning VM configurations and backups when using Citect ?

Thanks for your help,

Patrice Jacob

Prosystech inc.

Parents
  • Yes, AnywhereUSB can be used. We use these as well but have started moving towards soft licensing so this system isn't reliant on another piece of hardware along with the firmware and driver updates that are required periodically. It's not nice having a single device that can lock up and take down all your licenses (or half of them) at once. Ideally soft licenses will provide higher reliability - as long as these issues with snapshots and license distribution are addressed.

    If you do use AnywhereUSB - then it's a good idea to split your licenses across 2 of them in different locations, and keep a spare. Also keep a record of driver versions and firmware so you can quickly swap out when needed.
Reply
  • Yes, AnywhereUSB can be used. We use these as well but have started moving towards soft licensing so this system isn't reliant on another piece of hardware along with the firmware and driver updates that are required periodically. It's not nice having a single device that can lock up and take down all your licenses (or half of them) at once. Ideally soft licenses will provide higher reliability - as long as these issues with snapshots and license distribution are addressed.

    If you do use AnywhereUSB - then it's a good idea to split your licenses across 2 of them in different locations, and keep a spare. Also keep a record of driver versions and firmware so you can quickly swap out when needed.
Children
No Data
© 2024 AVEVA Group Limited or its subsidiaries. All Rights Reserved.