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From: Sven Kieske <svenkieske(a)gmail.com>
To: users(a)ovirt.org
Message-ID: <571F7533.4070600(a)gmail.com>
Subject: Re: [ovirt-users] Max amount of datacenters per ovirt engine
References: <8DDA0C1A-7331-4880-B913-9D7769E07E30(a)familiealbers.nl>
<2126836.ESJW3ukn0O@awels>
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On 26.04.2016 14:46, Martin Sivak wrote:
I think that 1000 hosts per engine is a bit over what we recommend
(and support). The fact that all of them are going to be remote might
not be ideal either. The engine assumes the network connection to all
hosts is almost flawless and the necessary routing and distance to
your hosts might not play nice with (for example) the fencing logic.
Hi,
this seems a little surprising.
At least RHEV states in the documentation you support up to 200 hosts
per cluster alone.
There are no documented maxima for clusters or datacenters though.
@awels: to add another layer of indirection via a dedicated
hosted-engine per outlet seems a little much. we are talking about 500 *
4GB RAM at least in this example, so 2 TB RAM just for management
purposes, if you follow engine hardware recommendations?
But I agree, ovirt does not handle unstable or remote connections that
well, so you might be better of with hundredths of remote engines, but
it seems to be a nightmare to manage, even if you automate everything.
My personal experience is, that ovirt does scale at least until about
30-50 DCs managed by a single engine, but that setup was also on a LAN
(but I would say it could scale well beyond these numbers, at least on a
LAN).
HTH
Sven
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