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8 posts Started 1 year ago by Ruben Latest reply from Felix Schwarz
Hi I am working in a project and need that Mediacore work fine with 200 or more concurrent users.
But I don´t know the real enviroment for that, I was thinking in a server with dual hexacore processor (3Ghz) and other server only for streaming with a wowza or flash media server for rtmp streaming.
So the big server has the apache and databases and the other server has the videos.
That configuration is fine??
Do you know a test-software for simulate concurrent users??
Regards.
I think it's hard to give an exact hardware spec. Basically having a fast server helps (fast hard disks, lot of ram, a good CPU is nice too). Afterwards just take what you can get and simulate your workload.
To test performance, you might want to look into load-testing tools. Also it's really important to specify what your users will do on the site (load profile). I suspect defining on load profile or another can easily double/quadruple your hardware requirements.
The configuration you've listed should be really speedy. One thing - how much RAM are you putting into the server? MediaCore can be fairly memory intensive with higher loads, so I'd ensure you have at least 2GB but preferably 4-6GB in there. Our servers have 8GB on them, but we're running multiple MediaCore instances so there's a bit more memory required.
Separating the RTMP / Flash Media Server from the MediaCore App server is smart, streaming is definitely intense and it's good that's on the second box.
If you want to optimize things further (if traffic increases) you could run the database on a separate server as well. Then for big traffic we usually recommend load balancers / multiple MediaCore app servers. It all depends on how much traffic you're serving.
One other thing - we've noticed that Apache doesn't serve MediaCore nearly as quickly as NGINX, so if you really want to performance tweak things I would look into that. We've added a whole section in our docs on NGINX:
http://mediacore.com/docs/install/nginx-uwsgi.html
Also there's good performance tuning tips on the Apache docs now too! (Scroll to close to bottom)
http://mediacore.com/docs/install/apache-wsgi.html
I think that the server will has 12GB RAM or maybe 24GB, I have to see the peak of concurrent users because maybe it is 200 or maybe it is 500.
Is nginx-uwsgi better than apache-wsgi?? in all Mediacore project I config the wsgi tuning tips.
The disk array, do you think that raid 10 is the correct configurarion?? I have raid 5 in some old servers, but I don´t know, I think that raid 10 is better.
The load balancers / multiple MediaCore app servers is interesting but I don´t see something about it in mediacore documentation.
In benchmarks nginx/uwsgi can be faster than Apache/mod_wsgi but it's tough to say how much of an impact it will have with MediaCore in a real world situation.
There's a couple things you can do to improve performance, if you haven't already:
Have Apache or nginx serve all your static files and also make sure you disable "static_files" in your deployment.ini config file (this should save you some unnecessary disk IO).
Python isn't very good at multithreading, so you might want to try using lots of processes with only 1 thread each. You'll have to experiment with this though.
You can always split the database off onto its own server. Then if you want to add a second nginx/uwsgi server you can; they'd both sit behind a load balancer and talk to the same database. There's a lot involved here but it is possible.
Whatever you decide, I'd love to hear what configuration you go with and how it performs for you. I love seeing MediaCore in action, especially when there's lots of traffic involved :)
Hi Nathan, thanks for the info.
The project is in very very preliminar momment, but I have to study if mediacore is the correct way and the best server configuration for it, maybe if the project is approved I will have to contact with simplestation team for a modification or something.
Do you think that a very fast HD configuration is important or if the server has a lots of RAM (24GB) the HD config isn´t important, I will put 300GB in raid 10 that I think that is the best for data security and faster data transfers.
Well MediaCore uses a relational database (MySQL, PostgreSQL) so while these DBs will benefit from a lot of RAM (all tables in RAM with a good configuration), you still need to write some data to disk (new media, logging, comments, …) and these will benefit from a fast HD.
My guess though is that with some tuning (DB config, maybe nginx, using more processes instead of threads) a RAID-1(0) should be fast enough for most workloads. I'd try to install MediaCore on a (standard) test system without much tuning and doing a load test which simulates the expected real world load. Afterwards decide if you need more hardware or tuning.
HTH
fs
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