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From: Marcelo Tosatti <mtosatti@redhat.com>
To: Alejandro Comisario <alejandro.comisario@mercadolibre.com>
Cc: kvm@vger.kernel.org
Subject: Re: kvm cpu usage allocation
Date: Thu, 20 Feb 2014 20:00:10 -0300	[thread overview]
Message-ID: <20140220230010.GA16298@amt.cnet> (raw)
In-Reply-To: <CAMrG31zA6G-LyoxePODPZYHKmtWh1_U_eVyUR5_7xF+jO-c-sg@mail.gmail.com>

On Wed, Feb 19, 2014 at 06:42:56PM -0300, Alejandro Comisario wrote:
> Hi everyone.
> We are having a private cloud with more than 1000 phy servers.
> Each server has 128GB of RAM and 24 cores (2 heaxacores with HT
> enabled), but the amount of vms running on those servers versus the
> flavor (amount of CPU) made us use about 80 VCPUS.
> 
> The questions are as follow.
> 
> * is there a fine documentation of HOW kvm handles cpu allocation/pin
> per vm in an scenario like this one ?
> * is there also, a documentation that explains under a circumstance
> where a VM needs more processing power, how priority is managed ?
> * is there a way to define some kind of politics or rules to have
> specific cpu pinning for specific vms ?

Hi Alejandro,

Check "Chapter 7. Overcommitting with KVM" of


https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/chap-Virtualization-Tips_and_tricks-Overcommitting_with_KVM.html


      parent reply	other threads:[~2014-02-21  2:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-19 21:42 kvm cpu usage allocation Alejandro Comisario
2014-02-20 14:31 ` Alejandro Comisario
2014-02-20 23:00 ` Marcelo Tosatti [this message]

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