This is just a really quick one……
I noticed that upgrading an existing VSAN to the newly announced VSAN 6.0 is a non-disruptive rolling upgrade.
Fair enough, so it should be right?
Well…… part of the upgrade requires what sounds like a fairly significant underlying on-disk layout change. Basically, the upgrade to VSAN 6.0 updates the underlying layout to a new format based on VirstoFS technology. Sounds major to me!
So with that in mind…. I think an online rolling upgrade is fairly impressive. Well done to the VSAN team.
So If VSAN Can Do It Why Can’t Others?
The question then begs….. if VSAN can upgrade the underlying disk layout on the fly as part of an online upgrade, then why can’t XtremIO (or any other modern storage technology for that matter)?!?!?!
Is the VSAN architecture superior?
Now I get that there are different use-cases for storage technologies, and that there’s not a one-size-fits-all architecture. But on the topic of non-disruptive upgrades… is VSAN a superior architecture?
Am I Missing Something?
May be I’m missing something. May be the on-disk changes that VSAN is making are different and less fundamental than those recently made by XtremIO?
Just a curious guy asking a genuine question.
Comments welcome (please state your vendor affiliation).