3 ms·
That doesn't account for OpEx, though, such as power...
by floating-io 2y ago
That doesn't account for OpEx, though, such as power...
- wongarsu 2y agoAssuming something reasonable like 20TB Toshiba MG10 HDDs and 64GB DDR4 ECC RAM, quick googling suggests that 1TB of disk space uses about 0.2-0.4W of power (0.2 in idle, 0.4 while writing), 5GB of RAM about 0.3-0.5W. So your break even on power is a bit earlier depending on the access pattern, but in the same ball park.
- UltraSane 2y agoWhat about rack space?
- spockz 2y agoNot just rack space. At a certain amount of disks you also need to get a separate server (chassis + main board + cpu + ram) to host the disks. Maybe you need that for performance reasons any way. But saving disk space and only paying for it with some ram sounds cost effective.
- janc_ 2y agoThat works out only as long as you don’t have to replace the whole machine (motherboard & possibly CPU/CPUs) to be able to add more RAM… So essentially the same problem as with disks. In the end it all comes down to: there are a whole lot of trade-offs that you have to take into account, and which ceilings you hit first depends entirely on everyone’s specific situation.