[storage::hp::3par::ssh::plugin] Request a new mode "capacity"

[Aleksey-Maksimov]

Hello

Please make a new mode capacity in storage::hp::3par::ssh::plugin to check the percentage of utilization of raw storage capacity and analyze the effectiveness of the use of compression and deduplication technologies.

It is useful to have information in 4 slices:

1. Total capacity (showsys -space command)
2. Capacity of fast SSD disks (showsys -space -devtype SSD command)
3. Capacity of FC disks (showsys -space -devtype FC command)
4. Capacity of slow NL disks (showsys -space -devtype NL command)

Example:

3PAR01 cli% showsys -space
------------ System Capacity (MiB) -------------
Total Capacity                      :   24649728
  Allocated                         :   11457536
    Legacy Volumes                  :          0
      User                          :          0
      Snapshot                      :          0
    CPGs (TPVVs & TDVVs & CPVVs)    :    8585216
      Shared                        :      99328
      Private                       :    8308480
        Base                        :    8308480
          Reserved                  :    8308480
          Reserved (vSphere VVols)  :          0
        Snap                        :          0
          Reserved                  :          0
          Reserved (vSphere VVols)  :          0
      Free                          :     177408
    Unmapped                        :          0
    System                          :    2872320
      Internal                      :    1080320
      Admin                         :     294912
      Spare                         :    1497088
        Used                        :          0
        Unused                      :    1497088
  Free                              :   13192192
    Initialized                     :   13192192
    Uninitialized                   :          0
  Unavailable                       :          0
  Failed                            :          0
------------------ Efficiency ------------------
Compaction                          :       2.59
Dedup                               :       1.23
Compression                         :          -
Data Reduction                      :       1.23
Overprovisioning                    :       0.92

I will indicate what metrics may be of interest:

------------ System Capacity (MiB) -------------
Total Capacity                      :   24649728  <----- perfdata
  Allocated                         :   11457536  <----- perfdata
  Free                              :   13192192  <----- perfdata, warn/crit thresholds
  Unavailable                       :          0  <----- perfdata
  Failed                            :          0  <----- perfdata, if not 0 = crit
------------------ Efficiency ------------------
Compaction                          :       2.59  <----- perfdata
Dedup                               :       1.23  <----- perfdata
Compression                         :          -  <----- perfdata
Data Reduction                      :       1.23  <----- perfdata
Overprovisioning                    :       0.92  <----- perfdata, warn/crit thresholds

Perhaps it makes sense to do some kind of filtering of measurement types. For example, someone may not be interested in statistics in the context of disk types, but only total statistics are needed. And someone may be interested in the full statistics of NL/FC/SSD/Total.