[Postgres-xl-general] nodenames

Mason Sharp msharp at translattice.com
Mon Jun 2 11:17:29 PDT 2014


Hi Kelly,

On Thu, May 29, 2014 at 2:20 PM, Kelly Burkhart <kelly.burkhart at gmail.com>
wrote:

> Can someone explain the meaning of 'nodename'?
>
> - Is there some reason the nodename cannot or should not be the name of
> the host?  Why start with 'one' etc?
>

It can be arbitrary. It is possible to configure multiple nodes per server
or VM, so just using host might make things confusing.  Multiple nodes per
server can mean a coordinator + one or more datanodes, or just multiple
datanodes, for example.

For BI, it may make sense to configure multiple nodes per server to take
advantage of multiple cores and leverage more processing power.


>
> - If gtm_proxy, coordinator and data run on a single host, should/must
> they all have the same nodename configured?  Or must they be unique?
>

Internally IDs are used, and using commands like EXECUTE DIRECT ON nodename
would have problems identifying which node was intended. You may
theoretically be able name a GTM node the same as a datanode name, but I
think that just confuses things.

I hope that helps.

-- 
Mason Sharp

TransLattice - http://www.translattice.com
Distributed and Clustered Database Solutions
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