[ops][largescale-sig] How many compute nodes in a single cluster ?

Belmiro Moreira moreira.belmiro.email.lists at gmail.com
Wed Feb 3 20:40:04 UTC 2021

at CERN we have 3 regions regions with a total of 75 cells (>8000 compute

In the past we had a cell with almost 2000 compute nodes.
Now, we try to not have more than 200 compute nodes per cell.
We prefer to manage more but smaller cells.


On Thu, Jan 28, 2021 at 2:29 PM Thierry Carrez <thierry at openstack.org>

> Hi everyone,
> As part of the Large Scale SIG[1] activities, I'd like to quickly poll
> our community on the following question:
> How many compute nodes do you feel comfortable fitting in a
> single-cluster deployment of OpenStack, before you need to scale it out
> to multiple regions/cells/.. ?
> Obviously this depends on a lot of deployment-dependent factors (type of
> activity, choice of networking...) so don't overthink it: a rough number
> is fine :)
> [1] https://wiki.openstack.org/wiki/Large_Scale_SIG
> Thanks in advance,
> --
> Thierry Carrez (ttx)
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