[jira] [Assigned] (CLOUDSTACK-8181) Overprovisioning hosts happens when using first fit allocator + high disable threshold

["Nitin Mehta (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-8181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nitin Mehta reassigned CLOUDSTACK-8181:
---------------------------------------

    Assignee: Nitin Mehta

> Overprovisioning hosts happens when using first fit allocator + high disable threshold
> --------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-8181
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8181
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Nitin Mehta
>            Assignee: Nitin Mehta
>
> 1) In the host allocator, under a given cluster, we list all the hosts which match host tags
> 2) We iterate over this list of hosts and for each host check that the host has capacity or not
> 3) We return the first host found having capacity.
> 4) This causes usually the same host to get all the VMs until it goes out of capacity
> 5) So the change needed is return the host which has maximum free capacity from the list of hosts, instead of the first fit



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