What is the kind of QPS we expect for the system?


#1

Design Cache

Total cache size : Let’s say 30TB as discussed earlier.

Q: What is the kind of QPS we expect for the system?

#2

http://www.internetlivestats.com/one-second/#google-band


#3

I wonder how 10M QPS were calculated. My thought process is 500M tweets per day (https://www.internetlivestats.com/twitter-statistics/#trend), and wanting to store at least a week of tweets in a cache (3.5B tweets) results in 4B entries to store. Looks like 1:7 ratio of reads/writes. And roughly 47K written tweets and 325K read tweets a second.

As to a size: Each tweet text is 280 Bytes. 4B * 280 Bytes = 1.1Tb