We help IT Professionals succeed at work.

Hardware RAID with ZFS on Nexenta (OpenSolaris)

theoradically
on
1,941 Views
Last Modified: 2013-01-11
I am using Nexenta (Open Solaris) for its ZFS features on an Appliance that I use.  I was planning to set the disks as JBOD, but when I got down to it, the LSI MegaRaid SAS 8708EM2 controller did not support JBOD.  So, I had to set each of the 24 1Tb SATA disks as its own single disk RAID0 configuration.  This, at least, allowed the disks to be seen by the installation.  I mirrored the boot disks and used zpool not the Nexenta menu to create a 3 x 6disk raidz3 configuration with 3 hotspares.  The zpool will be used as an Iscsi target for remote VMware datastore.  Is this an efficient configuration or how could this have been done better with Nexenta.? Thank you for your help!
Comment
Watch Question

andyalderretired saggar maker
CERTIFIED EXPERT
Distinguished Expert 2019
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION
DavidPresident
CERTIFIED EXPERT
Top Expert 2010

Commented:
ZFS is designed for JBOD controllers.  Without a JBOD controller then you will suffer big performance hits due to the mandatory flush-on-write.  RAID0 disks behind a MegaRAID controllers do not behave the same as true JBOD target devices.  There is still caching and some degree of virtualization.

I am sure you will have no problem having volunteers lined up if you want to swap a MegaRAID for a 92xx JBOD equivalent LSI.  IN fact, you may even get TWO LSI JBOD controllers for this MegaRAID.

Author

Commented:
I am stuck with the hardware and looking need the free "open solaris" in a commercial environment.  How should I set this up for best performance?  If I use the hardware RAID10, how should I set up the zfs configuration?
President
CERTIFIED EXPERT
Top Expert 2010
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.