Bandan-
Thank you for the quick response and for your time.
To answer your question, yes, we have a need to dynamically increase the
available RAM that a KVM guest has available to it. i.e. change from 16GB to
32GB with minimal or no interruption of service.
I have taken a look at Qemu and from what I can tell however it seems to only
allow for the dynamic increase of processors(s) and their speed(s), or am I
missing something here?
Do you know of any similar program that would allow for the scaling of RAM for
one node\guest?
We are looking to implement this solution in an OpenStack cloud.
Thanks again.
v.
-Original Message-
From: Bandan Das [mailto:b...@redhat.com]
Sent: Wednesday, August 19, 2015 5:48 PM
To: ROZUMNY, VICTOR
Cc: kvm@vger.kernel.org; WEINSTEIN, MICHAEL A
Subject: Re: One off question: Hot vertical scaling of a KVM?
ROZUMNY, VICTOR vr9...@att.com writes:
Hello-
Your site states that one off questions might could be answered via
email so here I am.
I have limited knowledge of KVM, but it is my understanding that in
order to vertically scale RAM for a KVM the guest needs to be shut
down, resized, and rebooted, resulting in a 5-10 minute interruption
of service.
What's vertical scaling ? You mean, increase the amount of memory
the guest sees ? You could use Qemu memory hotplug I think but that
requires that the guest has been booted with enough number of
dimm slots.
Bandan
Is this true and if so do you know of any efforts to change this
behavior?
Thank you!
v.
Vic Rozumny | Principal Technical Architect AIC - ATT Integrated
Cloud | Complex Engineering
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