On Wed, Feb 9, 2011 at 10:13 PM, Fred M
<77fred.m AT gmail DOT com> wrote:
My employer is requesting I evaluate PureDisk and DataDomain for de-duplication.
One of the selling advantages of the PureDisk appliances is that you only buy the de-dupe licenses once. All hardware eventually gets old. When that happens, you can buy another PureDisk appliance and re-use your existing de-dupe licenses. You could build your own appliance with off-the-shelf hardware and re-use the licenses. With a DD, when you upgrade the hardware, you're re-buying the software again since the prices are not separate.
When you're doing the cost comparisons, factor in not only the initial purchase but also subsequent purchases.
I despise per-TB licenses too (as somebody else pointed out), If I had a choice, I wouldn't buy them and would tend to avoid the PureDisk licensing model specifically for this reason.
.../Ed