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List:       rhq-devel
Subject:    Re: What is the COMPLEX data type?
From:       Lukas Krejci <lkrejci () redhat ! com>
Date:       2013-11-19 17:39:27
Message-ID: 366136053.3711274.1384882767587.JavaMail.root () redhat ! com
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Note that I've been asked about exactly this a couple of days ago.

If our metrics were complex data, we could do really wild things like having a metric \
that would describe a topology of a cluster, etc.

----- Original Message -----
> From: "Heiko W.Rupp" <hrupp@redhat.com>
> To: "rhq-devel" <rhq-devel@lists.fedorahosted.org>
> Sent: Tuesday, November 19, 2013 6:15:48 PM
> Subject: Re: What is the COMPLEX data type?
> 
> Hey,
> 
> > What is the COMPLEX data type? It is listed in
> > org.rhq.core.domain.measurement.DataType but not in rhq-plugin.xsd. It's
> > almost unused in the codebase.
> 
> This was originally meant for data that is not a simple value or calltime,
> but
> rather tabular data like min/avg/max/count for method calls or similar.
> The hibernate statistics that we now return in an operation could have been
> such a complex metric. But we never implemented it and I guess that was
> mostly because this kind of data does not easily transform into a relational
> model.
> Now with C* we could revisit the idea if anyone is missing it ;->
> 
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