On Thu, 2006-09-14 at 11:53 +0400, Pavel Emelianov wrote: <snip>
> > What if I have 40 containers each with 2% guarantee ? what do we do > > then ? and many other different combinations (what I gave was not the > > _only_ scenario). > > > Then you need to solve a set of 40 equations. This sounds weird, but > don't afraid - sets like these are solved lightly. extrapolate that to a varying # of permutations and real time changes in the system workload. Won't it be complex ? Wouldn't it be a lot simpler if we have the guarantee support instead ? Why you do not like guarantee ? :) <snip> > >> Then how do you make sure that memory WILL be available when the group > >> needs > >> it without limiting the others in a proper way? > >> > > > > You could limit others only if you _know_ somebody is not getting what > > they are supposed to get (based on guarantee). > > > I don't understand your idea. Limit does _not_ imply anything - it's > just a limit. I didn't mean "limit" as defined in BC. I meant it in the generic sense. IOW, if we have to provide guarantees then it would limit other RGs from getting that (amount of guaranteed) resource. > You may limit anything to anyone w/o bothering the consequences. > Guarantee implies that the resource you guarantee will be available and > this "will be" is something not that easy. > > So I repeat my question - how can you be sure that these X megabytes you > guarantee to some group won't be used by others so that you won't be able > to reclaim them? It depends on how the memory controller is implemented. It could be implemented in different ways: - reclamation path will _not_ free pages belonging to a RG that is below its guarantee. - allocation from a "over guarantee" RG can succeed iff there is memory after satisfying all guarantees (or will free pages from the requesting RG before it will succeed). - ... BTW, my point is to have guarantees for _all_ resources not just memory. > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > ckrm-tech mailing list > https://lists.sourceforge.net/lists/listinfo/ckrm-tech -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - [EMAIL PROTECTED] | .......you may get it. ---------------------------------------------------------------------- ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
