I'd agree with that. Memory is nearly always the limiting factor when it comes to VMs per host.
-- unless you're talking about blades, and then you have to start looking carefully at the connectivity between the chassis and the switch fabric. Kind regards, Paul Angus Regards, Paul Angus paul.an...@shapeblue.com www.shapeblue.com 53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue -----Original Message----- From: uabstarn...@gmail.com [mailto:uabstarn...@gmail.com] On Behalf Of Mindaugas Milinavicius Sent: 11 April 2016 13:53 To: users@cloudstack.apache.org Subject: Re: VM per HOST? Thank you, i'm thinking something like that too..... Pagarbiai Mindaugas Milinavičius UAB STARNITA Direktorius http://www.clustspace.com LT: +37068882880 RU: +79651806396 Tomorrow's posibilities today <http://www.clustspace.com/> - 1 Core, 512MB RAM, 20GB SSD, 1Gbps, Unlimited, Location: Romania, Los Angeles, Ashburn Washington - 11EUR - 1 Core, 1024MB RAM, 30GB SSD, 1Gbps, Unlimited, Location: Romania, Los Angeles, Ashburn Washington - 18,7EUR - 2 Cores, 2048MB RAM, 40GB SSD, 1Gbps, Unlimited, Location: Romania, Los Angeles, Ashburn Washington - 27,5EUR - 4 Cores, 4096MB RAM, 100GB SSD, 1Gbps, Unlimited, Location: Romania, Los Angeles, Ashburn Washington - 46EUR On Mon, Apr 11, 2016 at 3:49 PM, Stavros Konstantaras <s.konstanta...@uva.nl > wrote: > In our case (general purpose VMs) we decided to have the system's RAM > as the reference point to create our VM limit. For example, if the > server has 128GBs of RAM and the default VM profile is 1 vCPU + 4Gbs > RAM, then our upper limit is roughly 30VMs per server. > > Over provisioning the CPU is usually not a problem but over > provisioning the RAM can be the start of many problems . > > Kind Regards > Stavros > > ---------------------------- > Stavros Konstantaras > Science faculty Research IT support (FEIOG) University of Amsterdam, > Science Park 904, 1098 XH > > Fingerprint: E5E5 9B19 D1CD 88CD 4763 3465 A8DC 7C92 330F D59A > > > On 11 Apr 2016, at 13:09, Erik Weber <terbol...@gmail.com> wrote: > > > > On Mon, Apr 11, 2016 at 1:02 PM, Mindaugas Milinavičius < > > mindau...@clustspace.com> wrote: > > > >> Hello, > >> > >> how many VM's do you creating per host? > >> What you prefer E5-2650v3 or E5-2630v3 (less power, 2x cheaper CPU, > >> and only ±20% less benchmark) > >> > >> > > I'd say it depends on the workload. For generic purpose VMs CPU is > usually > > not the bottleneck and personally I'd pick the cheaper one. > > > > You should look into v4 CPUs while at it. > > > > -- > > Erik > >
