ONTAP 9 – clustershell, nodeshell and systemshell (screencast)

In my last screencast I have briefly (just over 6 minutes) explain what are and how to access clustershell, nodeshell, and systemshell.

If you rather read an article about those, some time ago I have also published an entry NetApp cDOT – Clustered Data ONTAP Command Line

What you have to remember about those 3 shells are:

    • default shell is a clustershell – that’s the one you access when you log in via ssh to Your cluster (via cluster management IP address, or one of the nodes). This shell is used to work with Your cluster, this CLI is used to create and manage SVM (Storage Virtual Machines), this shell is intended for everyday operations.
    • a nodeshell gives you a separate CLI to manage and monitor a single node within a cluster. If you want to access a nodeshell, you have to specify to which node you wish to connect to. There are different commands to work with a nodeshell, those are very similar to old-type Data ONTAP, called 7-mode. You would use a nodeshell to monitor Your node performance and utilization, to verify the connectivity of shelves and drives. But all provisioning tasks should be done from the clustershell.  To access a nodeshell, you have to first access a clustershell.
    • a systemshell is a low-level shell, which you shouldn’t access unless you have to. You can only access it from clustershell, and you have to unlock (and know the password) of build-in user diag, you access a systemshell only from the diagnostic privilege level. In my video I gave you example, that nodeshell can be used to review the audit logs which is true, however there are more secure ways to review the audit logs, which does not require you to enter a systemshell. I will go through this topic in a separate entry, but long story short You can access it via https protocol (provided that you have web logs enabled) :

As always, please let me know if You have any comments or questions regarding the video.

ONTAP 9 – Introduction to CLI (screencast)

Few days ago I’ve recorded a short screencast – Introduction to Command Line Interface for ONTAP 9 (or clustered Data ONTAP 8.x since on this level there is no difference). It’s just over 6-minute video designed rather for beginners.

If you liked the content and you wish to learn a little bit more, you can check out those posts:

All comments, questions, suggestions are as always very welcome.

SnapMirror in Disaster Recovery scenario – NetApp 7-mode screen-cast

I have created kind of “part 2” of my previous screen-cast (How SnapMirror works). In this one I start with already existing snapmirror relationship between primary and secondary site. I have written short batch file that is simulating business critical application, which is, of course, using NetApp share. Once the application is up-and-running I simulate the ‘disaster’ of primary site and show you how you can recover from disaster, using your DR (secondary) site, together with SnapMirror technology.

During the video I’m also explaining, on the example, what is RPO and RTO. More theory about those two you can find in this post: RPO and RTO – Understanding the difference