zfs newbie

[Dan Langille]

DTD wrote on 9/7/21 5:51 PM:
> Following the default 12.2 zfs install I got one pool (zroot) and a 
> dataset for each of the traditional mount points. So zfs list shows:
>
> NAME                 USED  AVAIL  REFER  MOUNTPOINT
> zroot                279G  6.75T    88K  /zroot
> zroot/ROOT          1.74G  6.75T    88K  none
> zroot/ROOT/default  1.74G  6.75T  1.74G  /
> zroot/tmp            176K  6.75T   176K  /tmp
> zroot/usr            277G  6.75T    88K  /usr
> zroot/usr/home       276G  6.75T   276G  /usr/home
> zroot/usr/ports       88K  6.75T    88K  /usr/ports
> zroot/usr/src        670M  6.75T   670M  /usr/src
> zroot/var           47.5M  6.75T    88K  /var
> zroot/var/audit       88K  6.75T    88K  /var/audit
> zroot/var/crash       88K  6.75T    88K  /var/crash
> zroot/var/log        820K  6.75T   820K  /var/log
> zroot/var/mail      46.3M  6.75T  46.3M  /var/mail
> zroot/var/tmp         88K  6.75T    88K  /var/tmp
>
> I had consultant configure another service for us. He set up the disk 
> array with one dataset. so zfs list on this system give:
>
> NAME    USED  AVAIL  REFER  MOUNTPOINT
> zroot  2.65G  13.2T  2.62G  legacy
>
> From a sysadmin view I rather like the multiple datasets. Are there 
> advantages to one over the other?

I see no advantages to me in the single dataset.

What do you see from zpool status? I'm wondering if this is not directly 
on hardware, such as a VM under VMware.