RAM or CPU which matter most for high load bbb

[Zeeshan Ali Shah]

HI, 

I am currently running on 8GB server with 8 cores, I have tried upto 50 users with 10 meetings. Currently I am planning to buy the big server with more rams and better CPU. 

There are various options either to go with more RAM or towards better CPU. 

Q1:  I assumed that since main core of bbb is red5 which is based on java so my initial thought was to get more RAM due to java utilization of memory . 

Q2: I have not checked it but i guess bbb is an multi-threaded application , am I right ?

Q3: Other Option is to move Freeswitch on seperate machine but it seems all the traffic route to/from red5 than having a seperate FS server would not make much sense. 

any suggestion ? 

Zee

[ghazi...@speakserve.com]

Hi,

I can share some answers with you, all results I am sharing are based on heavy load tests :

Q1 : Surprisingly Red5 does not use a lot of RAM as you we should normally expect. All red5 webapps are optimisied and will normally not need more than 3 GB of RAM.
Q2 : Yes, one thread for each user. You will have approximatively 1% CPU use per user ( depends on your CPU )
Q3 : Not a bad idea, you will have all sound encoding calculation on a single machine, but since it is written in C++ it should fast. It would be worth testing.

But I have a question : did you use the stress test script or created real meeting with voice and video ? If it is the first answer then you should test with real voice to see when your server is stuck and can no more encode sound correctly.

Regards,
Ghazi

[Fred Dixon]

Hi Ghazi,

Thanks for sharing your experience.  

Zeeshan, for the benefit of others, for information on helping to determine how many users a BigBlueButton server can support, see

  https://code.google.com/p/bigbluebutton/wiki/FAQ#How_many_simultaneous_users_can_BigBlueButton_support

Regards,... Fred

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