Unix & Storage Wiki

Wiki Updates – Storage

Just a quick post to let you guys know what’s been happening in our wonderful Wiki recently. I’ve added a few new entries and updated a few others which I’d like to share. While I’ve been busy playing with the new toys ( Docker , AWS  and Puppet ), I’ve been neglecting an old favourite, storage. All the recent posts have been storage related in some way so here’s a run down on them.

After a gap of nearly 7 years I started working with NetApp filers again last year. Things have moved on during that time and (suprise!) I’d forgotten quite a bit of the stuff I did know so it was good to get familiar with OnTap again. The first article NetApp useful commands documents some of the CLI commands that I’ve found useful since my return. These vary from some of the basics to some more esoteric commands like adjusting the volume autogrow settings and checking which servers are accessing your NFS export. When you start out with NetApp, you’ll probably favour the OnCommand GUI. However, learning the CLI is still very useful if not essential. In addition to allowing you to automate procedures, some stuff is just easier to do in the CLI and there’s quite a bit of stuff you just can’t do in the GUI.

Next up how to add new disks to NetApp. If you upgrade your NetApp filer, this procedure shows you what you need to do to add the new disks into an existing aggregate.

One thing that was new since I last worked on NetApp is vfilers. If your not familiar with vfilers, as the name suggests they’re virtual filers, i.e. to the outside world they appear to be a physical filer but in fact are only a logical definition in an existing filer. Why would you want to use these? Perhaps for organisational reasons or you want to present shares/exports on a different IP subnet. Personally I’d say that if you haven’t got a good reason for using them, don’t. They only add a layer of complication. Having said that, they work well and if you do have good reasons, fo ahead and make use of them. In this article. we create a vfiler to provide a Snaplock compliance environment. This is slightly different from creating a standard vfiler in that you can’t create a vfiler on a compliance volume but instead need to create a small volume for the vfiler config files and move the compliance volume into the vfiler. The article takes you trough creating a vfiler, setting up the compliance environment, setting up a snaplock volume and moving the volume into the vfiler.

If you’re interested in learning NetApp a simulator is available although you need a support agreement to download it. Also a guy has created a NetApp course om udemy. No idea whether it’s good, bad or indifferent but it;s obviously a lot cheaper that the official training.

Other changes, I update the Linux VVM Tips article adding some information about importing volume groups from other servers. Iadded the blkid command to the useful linux storage commands article. And finally I added some brief notes about using iometer.

Hope you find these additions and updated useful. Don’t forget, if you would like to contribute an article contact us and we’ll set you up with an account. Bye!

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