Sorry for my absense, I can see we are having a few issues again on this topic which have been covered in length here.
In an ideal world where we have no limitations in $$$, we can design systems that will eliminate bottlenecks in the pano production. From this we deduct a lessor system which fits within our available funds.
Look at the data travelling through your system, as it has to move from the different stages, moving data to and from its host drive set takes longer then moving data from host drive set to the next drive set. With this idea in mind, you have to build a system with multiple hard drives or drive sets (RAID). The more we can separate each task the faster we can make the system.
To SSD or not to SSD? is only a question of money, as the SSD's in particular the 3rd Gen is very very fast, so if you can afford SSD's then go for it.
This applies to most OS's, Mac/PC and *nix
Have your OS/Applications on one set of disks - eg. The Bootdisk, i currently use two SSD's (2nd Gen) in RAID-0 i would prefer to have 4 SSD's for this or more simpli for the speed, these can be very small disks but they should atleast sum up to 120GB, or big enough to store your OS and your apps with spare space left.
There are guys who build systems for database handling and use 8 or more SSD disks and they are able to get speed of up or greater the 2GB/sec which is very fast :-) they then also you several sets like this for their various tasks, but they make sure that all sets equally fast and this is an important thing, as the system is only as fast as its slowest link.
Page-file, again this is something that both windows and Mac OS uses, but have different names for it, again here you need to accommodate for this, as no matter how much ram you have you will always need this temp-swap space for your OS. I here use 3 SSD's 2nd Gen in RAID-0, again to optimise speed, ideally it should be made up of many more disks but not enough $$$$
Temp/Scratch disk: the same as with the page-file, you can combine these to save some $$$$, but if it is possible then separate in a RAID-0 set, and again the more drives the faster it is.
Finally we came to the storage of the data, here if you have the $$$ you could use SSD's but in all honesty i would use large HDD in a stripe and mirror RAID combination.... this is not so that you do not have to back up your data because you have to do this regardless - not that I always practice what I preech, but you really should!
Now we are talking of the ideal situation here, where you make large pano's and hopefully are also making some money from it. The above WILL give you the best data flow!
All the best
Thanks for the extra information.
Although the subject has indeed been discussed multiple times, message #23 clearly contains something new and important, which is :
1 : a formula to calculate the maximum amount of memory one needs.
2 : a description of what will happen and advice on what to do if one can only have a certain part of the calculated memory.
Your message is absolute of great value but does not supply someone that wants to build a new system with concrete numbers.