How to map zfs iostat device name and sar -d device name ?

Question

Hi,
In order to measure the disk performances or bottlenecks, we need to map the disk devices name from zpool iostat -v and the sar -d output ?
Is there a way to map the 2 device names ?
Rgds

Answer 1

"/usr/bin/iostat -xpnCXMmz [interval] [count]" would be much easier to use, quicker, and requires no further work on your part.
Otherwise you'll have to convert the MPXIO device back to the underlying physical devices and from that to their equivalent sd device, then lookup those devices in your sar output. It's doable, but not quick or easy to do:
1) Identify the devices
# luxadm probe
2) For each Node WWN listed in "luxadm probe" run:
# luxadm display WWN
3) Grep the WWN in /etc/path_to_inst to get the ssd number
Example:
--- luxadm probe ---
No Network Array enclosures found in /dev/es
Found Fibre Channel device(s):
  Node WWN:5000097408039c00  Device Type:Disk device
    Logical Path:/dev/rdsk/c8t5000097408039D10d0s2
    Logical Path:/dev/rdsk/c10t5000097408039D21d0s2
    Logical Path:/dev/rdsk/c16t5000097408039D18d0s2
    Logical Path:/dev/rdsk/c18t5000097408039D29d0s2
--- end ---
--- luxadm display ---
DEVICE PROPERTIES for disk: 5000097408039c00
  Vendor:               EMC    
  Product ID:           SYMMETRIX      
  Revision:             5874
  Serial Num:           6002310A4000
  Unformatted capacity:  2.812 MBytes
  Read Cache:           Enabled
    Minimum prefetch:   0x0
    Maximum prefetch:   0xffff
  Device Type:          Disk device
  Path(s):
  /dev/rdsk/c8t5000097408039D10d0s2
  /devices/pci@2,600000/SUNW,qlc@0/fp@0,0/ssd@w5000097408039d10,0:c,raw
    LUN path port WWN:          5000097408039d10
    Host controller port WWN:   21000024ff201482
    Path status:                O.K.
  /dev/rdsk/c10t5000097408039D21d0s2
  /devices/pci@6,600000/SUNW,qlc@0/fp@0,0/ssd@w5000097408039d21,0:c,raw
    LUN path port WWN:          5000097408039d21
    Host controller port WWN:   21000024ff201462
    Path status:                O.K.
  /dev/rdsk/c16t5000097408039D18d0s2
  /devices/pci@22,600000/SUNW,qlc@0/fp@0,0/ssd@w5000097408039d18,0:c,raw
    LUN path port WWN:          5000097408039d18
    Host controller port WWN:   21000024ff2014ce
    Path status:                O.K.
  /dev/rdsk/c18t5000097408039D29d0s2
  /devices/pci@26,600000/SUNW,qlc@0/fp@0,0/ssd@w5000097408039d29,0:c,raw
    LUN path port WWN:          5000097408039d29
    Host controller port WWN:   21000024ff20149e
    Path status:                O.K.
  (...snip...)
--- end ---
$ grep -i "5000097408039d21,0" ../etc/path_to_inst
"/pci@6,600000/SUNW,qlc@0/fp@0,0/ssd@w5000097408039d21,0" 179 "ssd"So you now have your [s]sd number, 179 in this example, and your target number, 0.
Repeat for the rest of your devices and you'll have a look up table you can refer to.