Hello, I’m running into an issue where the hard disk on my PR-1 fills with historian data before the 35 day pruning period that’s managed by Ignition Edge. The history is forwarded to my main ignition gateway, but there appears to be no way to adjust the pruning interval of the Edge Historian, so I’m in a situation where unless I manually prune the data every 2-3 weeks, the Epic runs out of hard disk space.
I know that switching to a PR2 would eliminate this problem, but I’m wondering if I can solve it by storing the historian data on a USB drive mountd to the Epic. I see the details about configuring the USB file directories in Groov manage, but I’m curious if anyone has ever used this for storing their Ignition Edge history in this fashion? Thanks!
I believe under the hood edge uses sqlite for the historian, so presumably somewhere in the config for Ignition there’s a path to that. Technically, you could mount a USB, copy the db over, and create a symbolic link from the original db path to your new USB mounted one. Maybe technically possible, but very work-around’y.
If it’s filling it up too quick, maybe tackle how often you’re logging data on some less critical parameters? I’ve not had an issue with data capacity on PR1’s, but our normal apps only hook up to one or two PLCs.
Thanks for the guidance. Based on your comment and some additional research, yes it’s definitely possible (and very work-around’y), but still trying to work out the kinks. I’ll post the details here if we make it work.
The scope of our ignition implementation has grown considerably from what I initially expected, so we have several PLC’s and dozens of additional sensors/instruments/controllers that we’re monitoring to various levels of detail. I’ll definitely look at increasing the deadband on some values, but not sure if it’ll be enough to get us under the threshold.
