Expand XFS LVM logical volume

Expand XFS LVM logical volume with 1TB, assuming you have enough free unassigned space on physical partitions.
Check the available space:

pvscan
  PV /dev/sdb1   VG vg1          lvm2 [1.06 TB / 0    free]
  PV /dev/sdb2   VG vg1          lvm2 [1.06 TB / 789.19 GB free]
  PV /dev/sdb3   VG vg1          lvm2 [1.06 TB / 0    free]
  PV /dev/sdb4   VG vg1          lvm2 [5.00 TB / 3.16 TB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [148.38 GB / 0    free]
  Total: 5 [4.33 TB] / in use: 5 [4.33 TB] / in no VG: 0 [0   ]
Exten volume:
lvextend -L+1024GB /dev/vg1/v2
xfs_growfs /dev/vg1/v2