Archive for the ‘ OpenFiler ’ Category

How to make a volume in Openfiler larger

If there’s one things that disks do well, it’s fill up and run out of room.  My Openfiler iSCSI volumes always seem to be filling up as the virtual machines that live in them grow or I make snapshots.

If there is free room in the volume group that a volume is housed in, it’s very easy to make a volume larger with Openfiler.  See my updated Openfiler wiki pages for some notes on this.

Openfiler reboot issue

A default install of Openfiler 2.3 has an issue when rebooted.  On a default installation of Openfiler 2.3, clients cannot use iSCSI target disks after a reboot.  In other words, it’ll work fine until you reboot it.  This has been discussed at some length in Openfiler forums, and has an open bug filed against it.

Also note that it has nothing to do with using XenServer. The iscsi-target service will not properly restart after a reboot, period, whether you are using XenServer as a iSCSI client against the Openfiler target or not.

I added a section to my “Openfiler: The Missing Manual” that discusses what this looks like and how to fix it.

Openfiler holds its own in tests against dedicated storage appliances

I have access to a couple of different storage arrays, so I decided to see if Openfiler lags them significantly in performance.  Turns out Openfiler does just fine.  In fact, against a Dell/Equallogic PS5000E entry level array, my Openfiler install (running on a Dell 6950) is faster serving up storage for XenServer storage repositories.  It’s a very simple test, and benchmarks always lie, but in a real world test, Openfiler on a Dell 6950 is faster than a Dell PS5000E iSCSI array.

Next up:  Openfiler against NetApp.

Install and usage notes for iSCSI with Openfiler

I’ve been doing a lot of work with Openfiler, a well regarded Open Source Storage Appliance Software package. With Openfiler, you can take “any old” server you have laying around and make a iSCSI, CIFS or NFS file server easily and quickly. Here are my notes on getting Openfiler installed and working for iSCSI. Read more

“Where did all these hard drives come from?” or why you need shared storage

Shared storage is a way to virtualize storage.  Use a shared storage device (a storage area network) like a Fibre Channel or iSCSI array, and never buy a hard drive in a server again.  Just like virtualization allows you to better utilize the servers you already have, shared storage lets you better use the hard drives you use.  In fact, inventive use of shared storage lets you better use the hard drives you may already have in excess servers.

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