At this moment we are running one instance of dot (oacs 5-1)
in production mode in University of Valencia (Spain). Our university is one example of a dot big instance. About 60000 students and 3000 teachers. I like to comment our experience to the community after one working year. We are very pleased with the platform and we have noticed the following strongpoints:
-The platform is very stable.
-A big and friendly developper community.
-We have constructed a solid base from which we are going to accelerate the future developments.
but we are throwing in lack several things like for the next year:
-Disk quotes (for persons and communities).
-Possibility of filing courses to unload of objects the data base at end of courses (I think of there are some package for Oracle related with this)
-Some problems with scalability. We detect the last year that several functions have bad performance, mainly in administration pages (acs_permissions*), with thousands of users in the DB. Perhaps the problem is a bad Postgresql optimization (we are using Postgres 7.4.5). For this, this year we have not loaded all the users. At this moment we have 26000 users and 3000 groups with a reasonably performance (I will like to know other elearning platform running with that load ) but we are beginning to experience performance degradation. We are thinking to moving our hardware from 2 to 4 CPUs (64 bits Opteron).
-Many small bugs. I know we all are working in these. These are decreasing too quickly in cvs code. Thanks to all!
You can see our instance in http://pizarra.uv.es