Boy, am I not liking this thread's Subject line. :) > From: "Gareth Nelson" <[EMAIL PROTECTED]>
> On the technical side of things, just saw this on the JIRA: > Dale Innis - 28/Oct/08 12:27 PM > Seems like it should be possible to prevent "abuse" (i.e. people > loading their OpenSpace sims to an extent that hurts the performance > of the others on the same machine) by appropriate fiddling with the > operating system or hypervisor or whatever. Talk to the techies, and > put in CKRM policies or whatever to ensure that each sim process gets > at least its fair share of the CPU. (If it's about disk access or > network bandwidth rather than CPU, there are perhaps similar things > that would let you do similar things for those.) > > I'd go further by dynamically renicing "abusive" sim processes down, > but that's just me....... Thanks for the quote, Gareth; I was just looking through sldev to see if this technical question had come up. It actually seems likely to me that they've considered using CKRM policies or hypervisor settings or some equivalent to insulate the OpenSpace sims from each other, and to keep them from using more than one-quarter of a machine when there's contention, and it just turned out not to work for some reason. The technical folks who discovered that it didn't work probably aren't quite sure of exactly why, and they probably haven't described the issues in enough detail up the chain that it can come back to us via Jack with any fidelity at all; information flow is a difficult thing. BUT, just in case, because stranger things have happened, I do hope that someone reading this forwards a quick note to someone on the ground, saying "are you guys aware of the severity of this OpenSpace sim resource contention problem, and have you looked into using the OS or CKRM or the hypervisor or whatever to limit the OpenSpace processes from using more than a quarter of the machine when there's contention?", and then maybe even lets us know what the reply is. It could be, like, "oh, is that still a problem? sorry, I was busy with something else; we'll give CKRM a try and let you know; it'll probably work." And think how much pain that could avert! :) Of course people will (still) complain when it turns out their OpenSpace sims get really slow under loads that don't stress a full sim at all, but well... TANSTAAFL an' all. -- Dale Innis (DaleInnisEmail at gmail.com)
_______________________________________________ Policies and (un)subscribe information available here: http://wiki.secondlife.com/wiki/SLDev Please read the policies before posting to keep unmoderated posting privileges
