Selenoid: What does the count attribute do in a quota file?

Question

I started Selenoid with docker: aerokube/cm:latest selenoid start --args "-limit 20"

I then created a quota file with:

user.xml:

<qa:browsers xmlns:qa="urn:config.gridrouter.qatools.ru">
<browser name="chrome" defaultVersion="62.0">
    <version number="62.0">
        <region name="1">
            <host name="1.2.3.4" port="4445" count="10"/>
        </region>
    </version>
</browser>
</qa:browsers>

When I run with this user it runs 20 in parallel. I thought count="10" would mean this user can do at most 10 in parallel. And -limit 20 was the max for the VM. Is this the correct usage of count?

Answer 1

In fact count field in Ggr quota XML file means host weight. It makes sense when two or more hosts are present in quota. This attribute is called so for historical reasons. So when you have e.g. two hosts in quota with counts 1 and 3 then sessions will be distributed as 1:3 over these hosts. When counts are equal then distribution should be random uniform. If you set count equal to the real count of browsers for each host - then you also get random uniform distribution. This is what we are recommend to do in production.