[OmniOS-discuss] Write performance regression from r14?

[steve at linuxsuite.org]

Howdy!

    I have about 20 machines built on this image circa 2015?

    OmniOS_Text_r151014.usb-dd

    I just noticed that OminOS is being continued as omniosce.org.
    I downloaded the latest install image and did some testing,
    and I got about 1/3 - 1/2 the write performance I was expecting on a
simple RAIDZ setup.

    I installed fresh images  from omnios.omniti.com and omniosce.org
based on r22

    r151022.usb-dd

 as well as the r14 image above.

   I get about 1/3 - 1/2 the write performance with r22 compared to r14.
   It is  a simple write test using dd and measuring performance with
zpool iostat.

  Hardware and zpool is identical for each test. I simply swapped out the
boot disks
  and booted a different image.

 The hardware is simple..  DELL R710 with LSI-SAS9201-16e

   Thoughts?

  I would like to help resolve this if it interests anyone.

  r14 suits my purpose well enough... but this issue must affect others...

     -steve