Re: Queston about pcp performance metrics filesys.used

[fche@xxxxxxxxxx (Frank Ch. Eigler)]

William_Staten wrote:

> Good Morning. I wanted to know for the filesys metrics, was it a way to get 
> the
> name of the filesystem mounted or the full device mapper name to display
> instead of just "/dev/dm-#". [...]

There exist map-type metrics to assist:
% pminfo -f filesys.mountdir hinv.map.dmname

filesys.mountdir
    inst [0 or "/dev/dm-0"] value "/"
    inst [1 or "/dev/sda1"] value "/boot"
    inst [2 or "/dev/sdb1"] value "/boot/efi"

hinv.map.dmname
    inst [0 or "VolGroup00-LogVol01"] value "dm-1"
    inst [1 or "VolGroup00-root17"] value "dm-0"
    inst [204 or "VolGroup00-docker--pool_tmeta"] value "dm-3"
    inst [205 or "VolGroup00-docker--pool_tdata"] value "dm-4"
    inst [206 or "VolGroup00-docker--pool"] value "dm-5"
    inst [332 or "VolGroup00-root.back"] value "dm-2"


.... but no way AFAIK to wrap up that indirection into a direct single
metric fetch.  Ken, what do you think about a derived-metric facility
for this?

mounted_filesys.free = map_indom(filesys.free, filesys.mountdir)


- FChE