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 [email protected] www.shapeblue.com 53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mindaugas Milinavicius Sent: 11 April 2016 13:53 To: [email protected] 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 <[email protected] > 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 <[email protected]> wrote: > > > > On Mon, Apr 11, 2016 at 1:02 PM, Mindaugas Milinavičius < > > [email protected]> 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 > >
