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https://issues.apache.org/jira/browse/HELIX-73?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620084#comment-13620084
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Vinayak Borkar commented on HELIX-73:
-------------------------------------

We could make the host and port optional. However, we still need to be able to 
specify host and port, in addition to the ID, from the command line, correct? 
Or are you leaning towards not being able to specify host and port through the 
command line tools, but only be able to set those programmatically?

One other possibility is to completely remove host and port from 
InstanceConfig. If users want to use host and port, they can do so 
programmatically by setting the value in the ZNRecord in the InstanceConfig. 
Thoughts on that?
                
> Remove assumption that Instance.id is always host_port
> ------------------------------------------------------
>
>                 Key: HELIX-73
>                 URL: https://issues.apache.org/jira/browse/HELIX-73
>             Project: Apache Helix
>          Issue Type: Improvement
>          Components: helix-core
>    Affects Versions: 0.6.0-incubating
>            Reporter: Vinayak Borkar
>             Fix For: 0.6.1-incubating
>
>
> Currently, some parts of Helix make an assumption that the id of an Instance 
> is always made up of a combination of host and port. Can this assumption be 
> eliminated? If so, I can work on providing a patch that fixes this issue.

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