3 posts • joined 10 Nov 2011
All horribly wrong! ... who verified this article before publishing it ?!
Storage Virtualisation does not magically fix storage issues like the article suggests, it is NOT a replacement for RAID!
If you think a double disk failure in a RAID-5 set is bad wait till you see what happens when you get a double disk failure in a RAID-5 set that is incorperated into a virtualised storage pool ... Instead of hosts only using that RAID set losing storage, ALL your hosts using the pool lose their storage .. how fab is that! ;-)
It does however provide a very good method of moving your servers/applications LUNs about between storage tiers without the host being aware.
It also provides a method for better utilising your storage capacity (GB and IOPS), though you still have to be sure that you still keep data seperate that should be seperate (Logs and databases still shouldn't live in the same pool)
I wasn't going to mention that "overhead" comment the guy made,as I wasn't sure where he got it from, FC started as a nice tight transport protocol with little overhead (way better than Gig-e when FC first came out), I'd imagine 10GbE is better designed but wonder by how much ? ... will have to go read and satisfy my curiosity :-)
Not that great an interview
The interview is titled "How to get the best from your IOPs" .. but doesn;t actually get onto that topic .. was rather looking forward to something interesting.
If it could be expanded into which of the technologies available are best for a given scenario (eg. technology to use for a datawarehouse, vs a billing system) then it would be quite informative.