Are there any good sources of hardware sizing guidelines for servers running SSAS Tabular? Something along the lines of "if your models are estimated to be this big (in terms of memory) and you're expecting and average x-number of simultaneous connections...here's what you should start out with".
obviously they need more memory than most other systems to hold the data...but I'd also expect them to be able to take advantage of more cores and higher clock speeds...once it's in memory, its really just a matter of ripping through it and crunching the numbers. More cores to handle more concurrency, higher clock-speed for faster "crunching".
you're supposed to aim for 40% of the memory size of the original database. 1tb data = 400gb ram for SSAS Tabular.