Re: [zones-discuss] limiting a percentage of CPU resource on a zone
On 26/04/07, DJR [EMAIL PROTECTED] wrote: Hi, What would be the best way/easiest way to limit an amount of a 8core CPU to a specific zone. Can I do it in such a way to limit 2 of 8 cores, or does it have to be in a percentage bases. Im assuming it would be done with zonecfg, any help is appreciated. Project Duckhorn (Solaris Express = b55) makes this pretty easy - zonecfg has been extended to support new keywords, so you just have to : zonecfg -z somezone add dedicated cpu set ncpus=2-8 end and reboot the zone. From the zonecfg manpage: dedicated-cpu: ncpus, importance The number of CPUs that should be assigned for this zone's exclusive use. The zone will create a pool and processor set when it boots. See pooladm(1M) and poolcfg(1M) for more information on resource pools. The ncpu property can specify a single value or a range (for example, 1-4) of processors. The must be enough free processors to allocate to this zone when it boots or the zone will not boot. The processors assigned to this zone will not be available for the use of the global zone or other zones. This resource is incompatible with the pool property. Only a single instance of this resource can be added to the zone. -- Rasputin :: Jack of All Trades - Master of Nuns http://number9.hellooperator.net/ ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] limiting a percentage of CPU resource on a zone
DJR wrote: Hi, What would be the best way/easiest way to limit an amount of a 8core CPU to a specific zone. Can I do it in such a way to limit 2 of 8 cores, or does it have to be in a percentage bases. Im assuming it would be done with zonecfg, any help is appreciated. Some folks have already responded that you can use pools to do this. There was also an response about duckhorn which is a project that includes features that make setting up a pool for a zone very easy. There are actually several different ways to accomplish this, depending on what you want to do. Pools is one solution. For your configuration you would carve out 2 cpus for the zone. One drawback with pools is that those 2 cpus are no longer available for other zones, bound to different pools, to use when the one zone is idle. Another solution is the fair share scheduler (FSS). You can assign 25 shares to the zone and 75 shares to the global zone (as an example). FSS only kicks in when there is more work than cpu resources so you can overprovision the system but still guarantee a minimum equivalent to two cpus for the one zone and it guarantees the global zone will get at least the equivalent of 6 cpus and maybe more if the other zone is not so busy. Finally, you could use cpu-caps to set a limit. You could set the cpu-cap to 200 (equivalent to 2 cpus). This doesn't guarantee a minimum. It sets a maximum but still allows all of the work to run on all 8 cpus and you can still overprovision the system if the one zone isn't always using two full cpus. You can also combine these various solutions in useful ways. The duckhorn project does try to make the configuration of these features simpler and better integrated in zonecfg. You might want to take a look at it or at the zones docs for all of this. I have a blog about it here: http://blogs.sun.com/jerrysblog/ which might be a good starting point. Jerry ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] limiting a percentage of CPU resource on a zone
Although the next release of Solaris 10 (mid-year 2007) will have the wonderful new features that Jerry mentions, until then, here is an example of commands to use. They create two pools and associate one zone with each pool. lloy0076 wrote: Howdy, * http://docs.sun.com/app/docs/doc/817-1592/6mhahuoli?a=view#gdoqj On a system that has zones enabled, a non-global zone can be associated with one resource pool, although the pool need not be exclusively assigned to a particular zone. Moreover, you cannot bind individual processes in non-global zones to a different pool by using the poolbind command from the global zone. To associate a non-global zone with a pool, see Configuring, Verifying, and Committing a Zone. --- Ths implies that if you know how to limit/configure a resource pool, you've probably answered the question you're asking. If I understand it, you'd: * configure a resource pool * set what limits (or lack of limits) you want it global# svcadm enable pools pools/dynamic global# pooladm -s Create a file poolfile which specifies the two processor sets and pools, and tells Solaris to try to keep both pools 80%, but give priority to apppset. More specifically, if CPU utilization of apppset is 80%, try to bring it under 80% by shifting a CPU from webpset to apppset, within the limits of minimum and maximum CPUs specified. It also tells Solaris that if the webpset CPU utilization is 80%, *and* apppset CPU utilization is 80%, it should shift a CPU from apppset to webpset, again within the CPU limits specified. = create pool webpool create pool apppool create pset webpset (uint pset.min=1; uint pset.max=2) create pset appset (uint pset.min=2; uint pset.max=3) associate pool webpool (pset webset) associate pool apppool (pset appset) modify pset webpset (string pset.pool.objectives=utilization80) modify pool webpool (int pset.pool.importance=1) modify pset apppset (string pset.pool.objectives=utilization80) modify pool apppool (int pset.pool.importance=2) modify system default (string system.pool.objectives=wt=load) = Use that file: global# poolcfg -f poolfile Verify the config: global# poolcfg -c info Save the now-active config for next boot: global# pooladm -c * associate it with a zone [or project or task etc] global# zonecfg -z webzone set zone.pool=webpool exit global# zonecfg -z appzone set zone.pool=apppool exit Now... wasn't Jerry's 'duckhorn' method easier? ;-) -- Jeff VICTOR Sun Microsystemsjeff.victor @ sun.com OS AmbassadorSr. Technical Specialist Solaris 10 Zones FAQ:http://www.opensolaris.org/os/community/zones/faq -- ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] limiting a percentage of CPU resource on a zone
Howdy, * http://docs.sun.com/app/docs/doc/817-1592/6mhahuoli?a=view#gdoqj On a system that has zones enabled, a non-global zone can be associated with one resource pool, although the pool need not be exclusively assigned to a particular zone. Moreover, you cannot bind individual processes in non-global zones to a different pool by using the poolbind command from the global zone. To associate a non-global zone with a pool, see Configuring, Verifying, and Committing a Zone. --- Ths implies that if you know how to limit/configure a resource pool, you've probably answered the question you're asking. If I understand it, you'd: * configure a resource pool * set what limits (or lack of limits) you want it * associate it with a zone [or project or task etc] DSL ___ zones-discuss mailing list zones-discuss@opensolaris.org
