> we are in the process of purchasing hardware for a server to run Moodle that would support 2000 users with estimated concurrent users 500 "taking exams or serving the learning site or watching videos (videos would be in the server not in a internet video hosting server )"
Yes, this type of questions arises often in this forum. (Skim through past discussions. "Googling" is not the same thing. If you are that type, try the Moodle Advanced search: https://moodle.org/mod/forum/search.php?id=5 ).
> we would use linux ,I had read in the forum
Yes, most of the regulars here are either Linux or BSD. So Linux is never a bad solution, provided you have some affinity with its oddities. (Here is a recent negative example, "From Windows Server to Linux" https://moodle.org/mod/forum/discuss.php?d=278245.
> #Moodle 1.7 Quiz Handles 300 Simultaneous Users on One Server
Ha, ha, ha! Seven years and ten major versions ago!
Still, I wasn't aware of that discussion. Thanks for pointing it out! (Perhaps I should learn "googling"! ;)
> thanks for hem he is giving a lot of information about his setup and statistics of running environment but that is for old version and we are going to run the new version 2.7 so 1- i dont know if i can count on his statistics to run the new version
No, not at all.
> #rule of thumb moodle The 1G per 50 concurrent users
This rule of thumb (and contradicting "rules") circulate here. Accoriding to this recent post, "Re: How many concurrent users should my hardware support?" https://moodle.org/mod/forum/discuss.php?d=277791&parent=1197115, it is approaching 10 per GB.
> i read this rule a lot in the forum and i know that concurrent users is "the 50 person is requesting things at the same time and the server would handle there requests" 2- am i understanding it correctly and 3- is this rule is also applicable if the users are watching videos and 4- what about the processor
There is no general agreement here. (Search the forum). This is what https://docs.moodle.org/27/en/Performance_FAQ says: https://docs.moodle.org/27/en/Performance_FAQ#How_do_you_define_.22concurrent_users.22.3F.
> 5 - is there any one running the new version can share with us his hard ware configuration and how many users his hard ware had supported and the percentage of usages of processor ,ram and network from his hardware
Not much use to you. See the prev. answer from Tim Hunt.
Hardware and performance
hardware requirements for 500 concurrent users
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