I have just finished upgrading 6 member VSLS OpenServer clusters (two of them) from R80.10 to R80.40 and we had decided to go with clean install and reconfigure, although it does take considerably longer.
If I chose to upgrade instead of clean install and re-configure, does that mean we keep the old filesystem ext3 instead of getting xfs?
Yes, you would retain ext3 currently.
CPUSE upgrades are not currently performing the replacement of filesystems to xfs and will retain your ext3 filesystem formats until you perform a clean installation.
Whilst I'm not certain, I suspect that typically this procedure during CPUSE upgrade isn't available as the 2.6 kernel used perhaps doesn't have xfs merged in and therefore fresh installs prepare volumes using 3.10.
I'd be interested to know how that applies if you went from 3.10/ext3 to 3.10 again using CPUSE though, so that'd be interesting to know - But I've never hit a scenario to try.
Has anyone tried CPUSE CLI upgrade with VSX?
Only in lab environments, just to see the results and they meet my previous answer.
Same time changing file system means that rollback will get more complex as you cannot roll back snapshot that was made in different FS, so you would have to re-install 2.6 before being able to restore snapshot.
If you're doing a CPUSE upgrade, the filesystem will not be changing and so your snapshots will be the same ext3 formatting.
Unless you mean to revert to a snapshot that has been exported before upgrade and imported back onto the appliance after upgrade, which in itself sounds like it may have more complications than just the filesystem discrepancy.
The transition from ext3 to xfs operationally has been smooth - I've not encountered issues directly as a result of it but I do not believe there to be a gain on GWs as there is on Management.
Personally, I'm more of a fan of xfs on the whole anyway. I've been accustom to using it outside of Check Point for quite a number of years.