Re: Licence manager and class scheduling
From: Syltrem (syltremzulu_at_videotron.com)
Date: 08/07/03
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Date: Thu, 7 Aug 2003 13:27:11 -0400
Yes, Galaxy is great, but not cheap I'm sure !
-- Syltrem OpenVMS 7.3-1 + Oracle 8.1.7.4 http://pages.infinit.net/syltrem (OpenVMS related web site, en français) ---zulu is not in my email address--- "Main, Kerry" <kerry.main@hp.com> a écrit dans le message de news: FD827B33AB0D9C4E92EACEEFEE2BA2FB0C7A6D@tayexc19.americas.cpqcorp.net... Jim, Re: licensing, class scheduler and server consolidation .. The savings in a server consolidation project are typically in reducing the number of one app one servers and moving these apps to fewer servers with bigger cpu's. The trade-off is that now you have to be concerned with one application (or group of processes) taking over more resources than their share of the system and impacting other groups. Hence, to enforce various service levels in place, a class scheduler (or workload manager) is used to restrict specific workloads so that they never take over more than x% of the cpu resources on the system. This is also where Galaxy can assist as well. If two applications do no play together well (for whatever reason), then you can put them on separate OS partitions and let the Galaxy software dynamically move cpu's back and forth between the 2+ OS instances as the workload changes. You can also set Galaxy up for managing resources with something like "move 3 cpu's from the mid tier App Server after 21:00 on InstanceA to the database /batch server on instanceB to assist in daily crunching, but then move the 3 cpu's back at 06:00 to assist the App Server deal with the daily interactive loads." I suspect what you are hinting at is actually something a bit different ie. resource based charging where detailed audit reports show exactly how much CPU time each process utilized and the end user/business group are charged accordingly. Its kind of like your hydro utility i.e. monthly billing based on historical estimate, but adjusted periodically to deal with changes in workloads. :-) Regards Kerry Main Senior Consultant Hewlett-Packard (Canada) Co. Consulting & Integration Services Voice: 613-592-4660 Fax : 613-591-4477 Email: kerryDOTmain@hpDOTcom (remove the DOT's and replace with "."'s) OpenVMS DCL - the original .COM > > -----Original Message----- > From: Jim Brankin [mailto:jbrankin@ntlworld.com] > Sent: August 6, 2003 12:45 PM > To: Info-VAX@Mvb.Saic.Com > > I have a suggestion for an enhancement to VMS. How about > coupling class based scheduling with the licence manager. > > The object of the exercise would be to licence software to > use a certain percentage of the resources of a machine. It > seems to me that this would encourage server consolidation > and that this would benefit VMS. > > The cost of software licences frequently varies with the CPU > power of the machine, sometimes with the amount of memory and > almost never with the capacity of the I/O subsystem. > > It seems to me that this works against VMS, which can walk > and chew gum at the same time. You can run more than one > application on a single machine whereas in the Microsoft and > Linux worlds that is rare. > But if you run two apps on the one machine you pay licence > fees as though each application had the machine to itself. > This encourages folk to use the one machine / one application model. > > Now, if you could buy a licence which said that an > application will use only half the CPU power of the machine > then the problem would be solved. It should be possible for > the licence manager and the class based sheduler to > co-operate to provide this. Just add the schecduling class > and the percentage to the information specified in the > licence and have the licence checking routine check that the > user id is in the right scheduling class and that the > percentage of the machine available to that class is acceptable. > > > What do you think? > > Jim > > > > -------------------------------------------------------------- > -------------- > Pure Personal Opinion > > brankin at nildram dot co dot uk > -------------------------------------------------------------- > -------------- >
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