ZFS How to get Latency and IOPS in a Zvol?

[ItMan]

Hi All,
do it is possible that i find Latency and IOPS from zpool iostat -vl output for a zvol?

very thanks for your helps.
The best Regard,

 

[SirDice]

You can only get the IOPS for the whole pool or each individual physical disk. Not individual volumes or datasets within a pool.

 

[Bobi B.]

As a matter of fact, gstat -p (gstat(8)) includes (opened?) ZVOLs, along with ops/s and %busy; not sure if this information is correct, tho.

 

[ItMan]

You can only get the IOPS for the whole pool or each individual physical disk. Not individual volumes or datasets within a pool.

Hi
Thanks for you,
ok, so do you say to me how i get IOPS with zpool iostat statistics outputs?

very thanks for your helps,

 

[SirDice]

ok, so do you say to me how i get IOPS with zpool iostat statistics outputs?

root@maelcum:~ # zpool iostat
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
zroot       1.34G  50.2G      0     23    274   220K

The "operations read/write" statistics are the number of IO operations. Run it with an interval of 1 second:

root@maelcum:~ # zpool iostat 1
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
zroot       1.34G  50.2G      0     23    274   220K
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0    122      0  1.05M
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0    127      0  1.05M
{....}

 

[ItMan]

root@maelcum:~ # zpool iostat
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
zroot       1.34G  50.2G      0     23    274   220K

The "operations read/write" statistics are the number of IO operations. Run it with an interval of 1 second:

root@maelcum:~ # zpool iostat 1
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
zroot       1.34G  50.2G      0     23    274   220K
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0    122      0  1.05M
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0      0      0      0
zroot       1.34G  50.2G      0    127      0  1.05M
{....}

Thanks,
I use :
dd if=/dev/zero of=/p-2/test.iso bs=128K count=80000 conv=fdatasync


and my output is :
capacity operations bandwidth
pool alloc free read write read write
-------------------------- ----- ----- ----- ----- ----- -----
p-2 34.6G 10.8T 0 419 0 25.5M
mirror 17.3G 5.42T 0 209 0 10.1M
wwn-0x5000 - - 0 104 0 5.05M
wwn-0x5000c5008d6 - - 0 104 0 5.05M
mirror 17.3G 5.42T 0 209 0 15.4M
wwn-0x5000c5008d6 - - 0 104 0 7.70M
wwn-0x5000c5008d - - 0 104 0 7.70M
-------------------------- ----- ----- ----- ----- ----- -----


is Total my IOPS is 104?