[ovirt-users] upgrading gluster brick os from CentOS7 to 8

Hello, I'm in progress of moving my oVirt HCI cluster to production. It was a bit complicated process because I had two new servers to install oVirt from scratch in the lab and three old servers with standalone kvm hypervisors in production. One of them (installed with CentOS7) was good enough to join HCI cluster. All three old kvm servers had production vms running on them. New cluster was installed with CentOS8 and oVirt4.4, I started with single node, then expanded it to two hosts with one another which acts as arbiter (just for stability in lab envirnment). After some testing and tuning I moved this two node cluster (without arbiter node) to my server housing. Then I prepared gluster brick on that one old server which I want reuse and join it to gluster storage so now it is replica 3 - two nodes are CentOS8 based and acts as oVirt hosts, one is CentOS7 and acts also as standalone kvm hypervisor. Then I migrated all vms from standalone kvm hypervisors to oVirt, then switched off two oldest hosts. Now I would like to reinstall CentOS7 node to oVirt host. My plan is to keep gluster brick fs and backup configuration and restore it after reinstall to CentOS8 as mentioned in https://mjanja.ch/2018/08/migrate-glusterfs-to-a-new-operating-system/. I want to speed up gluster healing. Does it make sense? Now the questin: Brick fs was created on CentOS7 and don't have new xfs features FINOBT,SPARSE_INODES,REFLINK. Could it be problem? Will be better to recreate fs in CentOS8 and then do full heal? I am afraid that it will take a long time and make big load to production hosts. TL;DR: Does gluster/oVirt4.4 make use of FINOBT,SPARSE_INODES,REFLINK xfs features? btw. oVirt is great product and HCI looks really functional and usable (with 10GE network and SSDsof course). Big thanks to developers and community! Cheers, Jiri