A few days ago I brought to you my how-to post on setting up your own failover iSCSI SAN cluster using Ubuntu, IET, GlusterFS and ZFS. It has been a fairly popular article so far. In fact, it's in my top 20 most visited articles of the month! Obviously it's something people are looking at doing themselves. I mean why not? Storage is a necessity, and if you can save some money setting up your own, then you should go ahead and do that!
Well, in the spirit of promoting this SAN solution running on Ubuntu Linux, I thought I would share with you guys a quick little video I put together. It has clips of my SAN cluster when it was running Openfiler using DRBD as the sync mechanism, and it has a new clip of my SAN cluster now running on Ubuntu with GlusterFS as the sync mechanism. Pay special attention to the blinking lights of both shots. You'll notice why DRBD sucks!
Did you see how friggin' hard the disks were working when it was using DRBD? I thought I was going to have a seizure looking at those blinking lights! Plus the iowait was pretty consistant at 30%. It really made using it completely unbearable.
With GlusterFS, the disks look like they are bearly being used at all. Performance on the Ubuntu cluster, running the same load is almost at 0% even using 7200RPM SATA disks! I think the proof is in the pudding.
Want to setup your own Ubuntu SAN? Check out my how-to article here: (Ubuntu iSCSI SAN Cluster)