Behind the Scenes: Episode 103 – vNAS using ONTAP Select

Welcome to the Episode 103, part of the continuing series called “Behind the Scenes of the NetApp Tech ONTAP Podcast.”


Former Tech ONTAP podcast host and current Virtually Speaking podcast host, Pete Flecha (@vPedroArrow), is the TME for vSAN at VMware and is always bugging me to do a show on vSAN. So, here we go!

This week on the podcast, we brought in the technical director for ONTAP Select, Peter Skovrup ( to discuss the latest improvements in ONTAP Select, including the ability to use ONTAP Select on VMware vSAN platforms!

Finding the Podcast

The podcast is all finished and up for listening. You can find it on iTunes or SoundCloud or by going to

Also, if you don’t like using iTunes or SoundCloud, we just added the podcast to Stitcher.

I also recently got asked how to leverage RSS for the podcast. You can do that here:

You can listen here:

Running VMware on ONTAP? Why you should consider upgrading to ONTAP 9.2.


VMworld is right around the corner, so it’s a good time to remind folks about the goodness that is ONTAP + VMware.

ONTAP already has enterprise class storage for VMware, with support for both NFS and FCP/iSCSI on the same cluster to host VMware datastores. ONTAP also has robust support for VMware friendly features, such as VVols 1.0, VAAI, inline deduplication/compaction/compression, vSphere integration via the Virtual Storage Console, backing up VMs with SnapCenter, FlexClones, SRA plugins and much more!

For more information on VMware with ONTAP see:

ONTAP 9.2 went GA a couple weeks ago and included some nice new features that fit very well into virtualization workloads. When you upgrade ONTAP, you are able to do it non-disruptively, especially for VMware environments. Plus, NetApp’s internal predictive analysis points to ONTAP 9.2 having the highest quality of the available ONTAP releases out there, so there’s not a lot of reason *not* to upgrade to ONTAP 9.2.

Now, for those features…

Aggregate Inline Deduplication

If you’re not familiar with deduplication, it’s a storage feature that allows blocks that are identical to rely on pointers to a single block instead of having multiple copies of the same blocks.

This is all currently done inline (as data is ingested) only, and currently  on All Flash FAS systems by default. The space savings come in handy in workloads such as ESXi datastores, where you may be applying OS patches across multiple VMs in multiple datastores hosted in multiple FlexVol volumes. Aggregate inline deduplication brings an average additional ~1.32:1 ratio of space savings for VMware workloads. Who doesn’t want to save some space?

At a high level, this animation shows how it works:


Quality of Service (QoS) Minimums/Guaranteed QoS

In ONTAP 8.2, NetApp introduced Quality of Service maximums to allow storage administrators to apply policies to volumes – and even files like luns or VMs – to prevent bully workloads from affecting other workloads in a cluster.

Last year, NetApp acquired SolidFire, which has a pretty mean QoS of its own where it actually approaches QoS from the other end of the spectrum – guaranteeing a performance floor for workloads that require a specific service level.


I’m not 100% sure, but I’m guessing NetApp saw that and said “that’s pretty sweet. Let’s do that.”

So, they have. Now, ONTAP 9.2 has a maximum and a minimum/guaranteed QoS for storage administrators and service providers. (Guarantees only for SAN currently) For VMware environments, storage administrators can now easily apply floors and ceilings to VMs to maximize their SLAs for their end users and customers.

Check out a video on it here:

We also did a podcast on it here:

ONTAP Select enhancements

ONTAP Select is NetApp’s software-defined version of ONTAP software. Select allows you to “select” whatever server hardware platform you want to run your storage system on (see what they did there?).

ONTAP Select has been around for a while, first in the form of ONTAP Edge. In ONTAP 9.0, it was re-branded to Select and NetApp started adding additional functionality to extend the use case for the solution outside of “edge” cases, such as remote offices.

Select runs on a hypervisor, usually ESXi. ONTAP 9.2 added some functionality that could be appealing to storage administrators.

These include:

  • 2-node HA support
  • FlexGroup volume support
  • Improved performance
  • Easier deployment
  • ESX Robo license
  • Single node ONTAP Select vNAS with VSAN and iSCSI LUN support
  • Inline deduplication support

Three of the more compelling bullets above (to me, at least) for VMware environments are 2-node HA, the ability to use ESX ROBO licenses and the vNAS support with vSAN.

If you’re already using vSAN in your environments, you’ll know that they don’t do file protocols like CIFS/SMB or NFS. Instead, they use a proprietary protocol that is intended to speak only to VMs. While that’s great for datastores, it limits what sort of tasks the vSAN can be used for.

With ONTAP Select running on top of a vSAN, you can present NAS shares to clients, host NFS datastores, etc, without having to buy new hardware. Not only that, but you can also present datastores via vSAN on the same ONTAP Select instance.


Pretty nifty, eh?

From the NetApp vNAS Solution Brief:

Starting with ONTAP Select 9.2, the ONTAP Select vNAS solution also supports
VMware HA, vMotion, and Distributed Resources Scheduler (DRS). After deployment
of a single-node cluster that uses external storage or consumes a vSAN datastore,
the node can be moved through VMware vMotion, HA, or DRS actions. The ONTAP
Select Deploy utility can detect these movements, and updates its internal database
to continue normal management of the node.

For more information on ONTAP select, see:

Got questions or feedback? Insert them in the comments below!