85 concurrent users in one Sim
Sunday, October 11th, 2009
Customers need to predict how many concurrent users can be accommodated on a Sim. In OpenSim were used to a maximum of 50 avatars or even less, depending on the number of prims.
The aim of the OSGRID people was to test if the SIM code improvements made in recent weeks have been effective.
The test was made on 9 October 2009.
Their goal was to reach the 100 users (the magic number) and the result is impressive because they managed to accommodate 85 real avatars(not bots). And the server did not crash, it was still accepting connections when they reached 85, people simply stopped logging.
So how did they do it? The answer lies in three points:
1) They abandoned Openjpeg technology to decode the J2K textures
2) Using the experience of Intel’s John HURLIMAN to rewrite the server code. It remarkable that the arrival of people from IBM and Intel is pushing up the quality of OpenSim
3) Improved management of server memory.
The result is impressive, 85 avatars on an old server with less than 1 GB of RAM.
