[ovirt-users] What prevents from using a very very low-end hardware for manager?

[Doron Fediuck]

----- Original Message -----
> From: "Nicolas Ecarnot" <nicolas at ecarnot.net>
> To: users at ovirt.org
> Sent: Friday, June 20, 2014 5:08:45 PM
> Subject: Re: [ovirt-users] What prevents from using a very very low-end hardware for manager?
> 
> Le 20/06/2014 15:27, Daniel Helgenberger a écrit :
> > @Nicolas, keep in mind system performance of the engine not only affects
> > the UI; but also various processes in the background.
> > Also, if you plan on using the VDI and self-deployment features ("User
> > Access") a slow UI might be very counterproductive and OOM conditions
> > the system unstable.
> 
> We don't plan to use VDI nor user access.
> 
> I was asking such a question because I see the manager as a small
> database maintainer, a leader which gives indications, authenticates,
> reports, and intructions, but does nothing heavy, does not calculate
> anything complex, and does not store heavy data.
> As I said, I have a feeling that in OUR case, the heaviest load dealt
> with the manager is the web UI, and as I said, I don't mind being VERY
> patient when setting things up.
> I feel that, once set up, the load will be very small, and the heaviest
> task I may need is to aski a host to manage the migration of a VM (wow !)
> 
> --
> Nicolas Ecarnot

Nicolas (and other on this thread),
I'd like to clarify one thing, as indeed this sometimes comes up as a question-
Where did oVirt prerequisites come from?

Since the engine may be installed with DWH & reporting, we need to consider
all components' needs including the DB;

The application server is configured to use 1 GiB of heap by default,
plus around 500 threads, which should result around 2 GiB of RSS in
the worst case. To that you have to add the RSS taken by the database,
the operating system, etc.

Adding Jasper requirements as well:

Resource Footprint Minimum         Recommended
Disk     ~1.3 GiB  10GB free       40GB +
RAM                4GB             8GB +
Processor          2 core minimum  2.5GHz + multi-core Pentium

So the end results[1] is around the above numbers to make sure we allow
this installation to work. It is possible to get along with less, if
you will not install some of the components, but this is what we should
expect from a standard installation.

Doron

[1] http://www.ovirt.org/Quick_Start_Guide#Prerequisites