Re: Pure data for transactions
Whilst it looks cheaper empirically to do it yourself, as an experienced infra/DW architect who has been through this several times before I can tell you its rarely that straight forward.
Firstly, the H/W costs are the tip of the iceberg - the software costs are thos which really bump up the price. Ive only even seen one client pay list price, but generally you can wipe 30% off that for starters.
Secondly, having access to free open source software is one thing, having the skills & experience to build that into a tuned, fully integrated and manageable solution is another. Dont underestimate how difficult that is.
if we do it your way ive got one and a half tons of iron, silicon and cabling splashed all over the datacentre floor, with probably a 12 month wait to get something that actualy works - while my business splashes cash on resources, hosting etc & gets no benefit from it - potentially costing them millions of pounds in the process or.....