<div dir="ltr"><div>Fusty? Lachlan - you really are fromt he Western Isles aren't you?</div><div><br></div><div>Another word: 'oose' - the fluff which collects under the bed. Or inside servers.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 5 September 2017 at 08:57, Carsten Aulbert <span dir="ltr"><<a href="mailto:carsten.aulbert@aei.mpg.de" target="_blank">carsten.aulbert@aei.mpg.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi<br>
<span><br>
On 09/05/17 08:43, Stu Midgley wrote:<br>
> Interesting. Ansible has come up a few times.<br>
><br>
> Our largest cluster is 2000 KNL nodes and we are looking towards 10k...<br>
> so it needs to scale well :)<br>
><br>
</span>We went with ansible at the end of 2015 until we hit a road block with<br>
it not using a client daemon a fat ferew months. When having a few 1000<br>
states to perform on each client, the lag for initiating the next state<br>
centrally from the server was quite noticeable - in the end a single run<br>
took more than half an hour without any changes (for a single host!).<br>
<br>
After that we re-evaluated with salt stack being the outcome scaling<br>
well enough for our O(2500) clients.<br>
<br>
Note, I ave not tracked if and how ansible progressed over the past<br>
~2yrs which may or may not exhibit the same problems today.<br>
<br>
Cheers<br>
<span class="HOEnZb"><font color="#888888"><br>
Carsten<br>
<br>
--<br>
Dr. Carsten Aulbert, Max Planck Institute for Gravitational Physics,<br>
Callinstraße 38, 30167 Hannover, Germany<br>
Phone: <a href="tel:%2B49%20511%20762%2017185" value="+4951176217185">+49 511 762 17185</a><br>
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