Rollback InterSystems IRIS version 2024.1.2

Question

Question

Hello,

While doing research on the upgrade to InterSystems IRIS 2024.1.2 version, I was wondering if it would be possible to rollback the installation and return to the previous version in case something went wrong ?

I didn't see anything talking about this in the documentation and when I tried to re-install an older kit over an upgraded instance, I couldn't use it.

Thank you in advance for your reponse

Product version: IRIS 2024.1

$ZV: IRIS for UNIX (Red Hat Enterprise Linux 8 for x86-64) 2024.1.2 (Build 398U) Thu Oct 3 2024 13:33:18 EDT

Discussion (5)5

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Ben Spead · 23 hr ago

There is no rollback mechanism built into the installer (unless there is an issue in the middle of the installation in which case it will back out the installation). If you are using a VM the best practice is to snapshot your VM prior to upgrade and roll back to the snapshot if something goes wrong. This should be done with care because any data changed post upgrade will be lost when you restore the snapshot.

3 0

score 0 · Answer 1 · 2024-11-20T08:14:10-05:00

Vincent Dheilly · 22 hr ago

Thank you for your answer :)

0 0

score 0 · Answer 2 · 2024-11-20T08:31:14-05:00

Ben Spead · 21 hr ago

most welcome!

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score 0 · Answer 3 · 2024-11-20T08:20:48-05:00

We had a similar experience where we had upgraded our Test environment to 2024.1 but then due to some of the bugs reported it was too late for us to restore from a back-up back to 2022.1.3. So now we are stuck with 2024.1 in our Test environment until we have time to go through 2024.2 and verify our little nuance bugs have been resolved.

score 1 · Answer 4 · 2024-11-20T08:54:10-05:00

I think for 100% certain rollback a restore by @Ben Spead suggestion would be the way to go. While maybe if you were going back to IRIS 2024.1.1 you could just rename the install directory and install the old version I would not count on that working. I think things like journal files and IRIS.DAT get upgraded so you can not go back. You could have a mirror on the old and new version and move from the old to the new but you would still lose data since you can not mirror to a downlevel version - InterSystems IRIS Instance Compatibility

I would go to the WRC and ask them. Contact the WRC