I inherited a DELL server powered by Ubuntu 20 and OpenZFS. I do not have a linux skillset but I would like to know the basics of navigation. 2 things I able looking to do is:
- Check the backup setup? It suppose to be doing hourly snapshots..
- How to increase the size of a drive that is almost running out of space.
- what type of issues would cause me to have to reboot the hypervisor?
This will depend on how your backups are tooled.
a) First check local machine's CRON file to see if you're running a push backup, where data is pushed to an archive machine.
If you can't find any CRON jobs running, then...
b) You'll check your backup archive machine's CRON file to local the pull backup script, where data is pulled to the archive machine.
c) Every backup setup is unique. If you get stumped, you'll likely hire someone to help you... decipher how backups are generated...
2) How to increase the size of a drive that is almost running out of space.
You can only do this if you have free space or by adding additional physical disks.
Rarely will someone... add physical disks... then leave this space unused...
So your likely first step will be to add physical disks, then go through the process of adding these disks as a separate ZFS pool or integrating your new disk(s) into an existing ZFS pool.
ZFS is complex... One minor wrong command can leave you in an impossible to reverse travesty... so before you do any ZFS work, ensure your full backups are working correctly + you've made a hot backup before doing any ZFS pool work.
3) What type of issues would cause me to have to reboot the hypervisor?
Rebooting your Hypervisor or any VM running ZFS should just work.