Check Disk Space in VxVM (Solaris)

Was trying to find out how much disk space i have left on a system as the partition was nearing max capacity..

root # df -h /opt/myapp
Filesystem size used avail capacity Mounted on
/dev/vx/dsk/mydg/myapp
961M 760M 201M 79% /opt/myapp

Tried this to get the free space in VxVM.. it looks pretty intimidating right? not good for the eyes. Here the "LENGTH" attribute shows the balance free space in 512Kb blocks.

root # vxdg -g mydg free
DISK DEVICE TAG OFFSET LENGTH FLAGS
disk1_1 HDS_6 HDS_6 4195200 12574080 -
disk1_2 HDS1_4 HDS_4 2098560 14670720 -
disk2_1 HDS_6 HDS_6 4195200 12574080 -
disk2_2 HDS0_4 HDS_4 2098560 14670720 -

so i have roughly 12574080 * 512 / 1024 = 6Gb free and 2Gb used in disk1_1.

For each individual disk, the balance free disk space is

# vxassist maxsize disk1_1
Maximum volume size: 12572672 (6139Mb)
etc...

so this pretty match up with the one reported by vxdg.

Therefore i only have 13Gb left in total, taking into consideration that i have a RAID 1.

This one only show the total space for the whole disk group. Again, here the figure matches.

root # vxassist -g myapp maxsize
Maximum volume size: 54489088 (26606Mb)

Something interesting. found from http://www.hyborian.demon.co.uk/notes/vx_cli.html#disksp that vxprint can also display the disk space.

root # vxprint -g myapp -dF "%publen" awk 'BEGIN {s = 0} {s += $1} END {print s/2097152, "GB"}'
31.9849 GB

And the total amount of diskspace in this system, i have...

root # vxprint -AQqdF "%publen" awk 'BEGIN {s = 0} {s += $1} END {print s/2097152, "GB"}'
99.8143 GB


Wow! great. the output from vxprint and vxassist disagree with each other. i think i would prefer to trust vxdg or vxassist since this is really the true size of SAN disk allocated.

Now to see when i can 'grow' the volume... :)