Re: Vs: Re: [realXtend] Performance statistics
The Beneath the Waves server at world.realxtend.org:9000 is also running on Taiga (and we have some scripting issues there). Anyway, this is very interesting discussion indeed and it's great to hear about everyone's experiences using Taiga and Naali. Some issues are to be expected at this point in development and feedback is very important. It would of course be a great help if you could take a look at the code yourselves as well and try to find the cause, since you are running the environments and know exactly how to reproduce the errors. -- http://groups.google.com/group/realxtend http://www.realxtend.org
Re: Vs: Re: [realXtend] Performance statistics
Are you aware that you nees to put assets/users etc tables that you have to the grid (default name) db not into opensim db? Sounds to me like the grid servises are going to their own db and not finding anything. For my taiga setup the opensim db is completely empty, i dont think the sim itself stores anything there. It asks the grid services to store/fetch data and thats mainly done in the grid (again default name you might have changed this from taiga wizard) db. Userserver saying its not finding uuid for agent might be that the grid db is empty. Can you verify you have your 300mb dataset in the grid db not is opensim db? The second possibility is of course that your standalone os version is old so that the db schema has changed and just putting your old tables to the grid db wont work. But i would expect it to give error on login/whatever if this was the case. Also for toni and you: I think fish and audi demos are not running taiga. Only thing that is running Taiga 0.1.1 (or 0.1.0 for that matter) is wolrd.ralxtend.org:8002. We will propably convert the demo worlds using taiga ~soonish. The main problem is that their stanalone db is sqlite and grid cant use that as is. If you know how to convert os standalone sqlite into grid mysql give me a shout :) the thing here would be a working scene exporter and then importing that to the Taiga replacement. -- Brgrds, Jonne Nauha Gmail via the Nokia N900 - Original message - Hello, Thanks everyone for the helpful info. One of my problem with realxtend was that it is sometimes diffucult to get info because it is considered obvious by developers :) Toni Alatalo: AFAIK e.g. the fishworld demo is now running current Taiga though, so migrations should work? Also some other demo worlds have been migrated to new server versions every once in a while. Could you perhaps provide your problematic dataset so that people who know about the migrations could debug that The dataset is over 300 Mb. I can put it online and give a download link to someone who wants to work on than. So far I have following exception when starting taiga On Request failed with Object reference not set to an instance of an object at OpenSim.Services.AssetService.AssetService.GetMetadata(String id) This repeats many times Then, after server starts no user can login. Server log: [CONNECTION BEGIN] We can't user info record for UUID ... [LLUDPSERVER] Ack timeout, disconnecting When I replace my database name with empty database name in ini files everything works OK (I configured databases manually, in OpenSim.ini, OpenSim.Server.ini and modrex.ini). Toni Alatalo: In osgrid tests they have reached something close to a hundred (80?) but indeed then things become slow. I have heard from osgrid testers that something like 40 would be usable with 0.6.9, and the Wright Plaza weekly meetings host I think typically 20 AVs and run ok? Yes, I saw many reports like this on 40-80 avatars existing simultaneously on OpenSim. The only thing I can say, this does not work for me. May be they know some magic words or have custom opensim adaptations or may be this issue somehow related to modrex? Jonne Nauha : But then again you cant just say i want my standalone server db to be a grid db im pretty sure this is not very easy... Why not? I have done that before with that old 0.5-release realxtend server without such problems. I'm now trying to run only one region simulator, all servers on the same machine and even this setup does not work. There should really be some easy way to transfer data between versions and different setups. Starting filling the world all over again each time new version is released is not really very pleasing expirience. Jonne Nauha: And if you do have a big world, why not go to grid mode and load balance your grid services and sim on multiple servers? Yes, I agree with that. The problem is I can't even get one region to work with Taiga. Besides, last time I tested grid mode in Taiga, it was not operational and since as I understand no one is actively working on multiregion grid support now, I expect things to be in the same state. Please, correct me, if I wrong here. Simple OpenSim 0.6.9 + modrex 100% does not work in grid mode (I have build a version that *does* work, just to see if it is possible, but have no time to try it fully, since I have been occupied with single region/standalone problems) Jonne Nauha: Was an interesting read. I hope you have posted bug reports for these as it seems you know where the problems lay. Don't feel shy to post taiga/ naali bug reports to github aswell :) I have reported one bug to opensim mantis (the one, that I tracked down to the exact code line where the problem happens), but they seem to have many bug reports and few time. The other issues, I'm not sure why exactly they happen. Sometimes I don't
Re: Vs: Re: [realXtend] Performance statistics
Hi, We are basically working on similar project - virtual education environment and have some expirience working with realxtend-based worlds. If you want to build a large realxtend-based world, be prepared to confront seriuos issues. The specter of problems is different from version to version. We are currently using OpenSim 0.6.9 RC1 + approriate modrex, all compiled from sources on 64-bit windows server + MSSQL Server as database engine. Overall database size ~ 300 MB Hardware: Dual CPU SMP Xeon Quad Core -based Server, 8 GB of RAM The setup is multiregion standalone, but almost all content is now contained within single region. We uploaded ~ 250 meshes (polygon count 900-3, average 7000), ~ 100 textures and about 1-minute length 50 sounds. Problem 1. Most of the time, the server uses 50-150 MB of memory, but peak memory consumption could easily go over 1.3 Gb. When this happens 32-bit version crashes with OutOfMemoryException. 64-bit version is incompatible with 32-bit ODE physics. Recompling ODE for 64 bit on windows produced weird physics behavior. Our solution: - compile the program with /LARGEADRESSAWARE flag Problem 2. World never loads fully. Only about 50-60% of all meshes is visible in 0.42 viewer, with Naali, the situation is even worse. Sometimes you also have few prims missing and rectangular holes in the ground. This is due to the way LLUDPClientStack is implemented in 0.6.9. There is also a bug there (see problem 3). Older implementations (Opensim 0.6.7) are better in a sense that 90-95 of all meshes will eventually be uploaded to client, provided you set ReliableIsImportant=true in opensim.ini. But 0.6.7+modrex is unstable when it comes to handling of large number of avatars simultaneoulsy (see Problem 4) Possible solutions: a. distrubute world viewer to users with all meshes already placed in cache (improves situation a lot, but not solves the problem completly. Increases client size, make difficlut to update your world) b. Use old Opensim 0.6.7 c. I have read that new Taiga server supports http assets downloading. This might improve situation (only when using new Naali viewer). When I tried to test, this, I was unable to run Taiga with my database (example installation with empty database works well, but useless). With our data set, it throws multiple exceptions on startup, have problem with logging users in, and a number of other issues. Problem 3. The code that handles resend of lost UDP packets in opensim 0.6.9 has threading-related bug, that lead to server continuolsly throwing Index out of bounds exception (every second of so) when user is logged in. This also makes Problem 2 worse. Solution: We have implemented a custom workaround, that seems to work Problem 4. The maximum number of avatars that can login to the region is 16. Anything more makes world absolutely unusable. Every five minutes somebody is thrown out, and every 15 minutes the server crashes and must be restarted. The maximum number of avatars that can work comfortably is 8. Solution: I don't know any solution here yet, we are working on it. Any help from anybody would be greatly appriciated Problem 5 realxtend Voice chat is not operational with multi-region setup Solution: Fix the code voice chat server code (we only have partial solution so far) I hope, this summury could help you. Good luck with your project. Feel free to contact me if you have any additional questions. Best regards, Denis Tarasov On 7 май, 09:07, Mikko Liukkonen mikko.liukko...@salpaus.fi wrote: Thx, Keep me updated, I will appreciate it. BR, Mikko Toni Alatalo ant...@kyperjokki.fi 6.5.2010 22:49 Mikko Liukkonen kirjoitti: We are implementing realxtend based learning game during this fall. I like to enquire if somebody have made some performance tests and could share the results with us. Folks at Intel did some profiling and optimizations last year to Opensimulator and are now continuing to work towards allowing large scale mass events etc., they gave a nice presentation in a workshop recently and the material is on-line: paper athttp://vw.ddns.uark.edu/X10/content/ARCHITECTURE--Designing-Extensibl... and the presentation with more about the future plans inhttp://vw.ddns.uark.edu/X10/content/Extensible%20Virtual%20World%20Ar... Otherwise the opensim-dev mailing list and sciencesim, osgrid etc admins are knowledgeable about this. Realxtend is not used as much for heavily used things yet, and the server side performance is probably quite identical 'cause modrex doesn't introduce much additional computing. BTW we are working on a learning environment for school kids using it too, pilot testing etc. will probably be done during fall in that project as well. There's a bit old/earlier news announcement about it athttp://maxping.org/business/real-life/realxtend-virtual-worlds-powere... (maxping seems to be offline now though?), more info coming late this month / early july probably and
