RHV 4.3: /var/log/ovirt-imageio-proxy/image-proxy.log
RHV 4.4: /var/log/ovirt-imageio/daemon.log
This log provides the used ticket number and RHV-Host for a backup transfer. It is helpful to identify the ticket numbers that are used in RHV to track a specific data transfer. It also shows any connection errors between the RHV-M and the RHV-Host.
TrilioVault is calling a lot of RHV APIs to read metadata, create RHV Snapshots and restore VMs. These tasks are done by RHV independently from TrilioVault and are logged in RHV logs.
/var/log/ovirt-engine/engine.log
This log is hard to read, but contains all tasks that the RHV-M is doing, including all Snapshot related tasks.
Additional logs that can be helpful during troubleshooting are:
/var/log/ovirt-engine/boot.log
/var/log/ovirt-engine/console.log
/var/log/ovirt-engine/ui.log