Storage Node - Disk Space Metric

Stefan Negrea snegrea at redhat.com
Mon Jul 15 20:46:29 UTC 2013



----- Original Message -----
> From: "Jay Shaughnessy" <jshaughn at redhat.com>
> To: rhq-devel at lists.fedorahosted.org
> Sent: Monday, July 15, 2013 11:34:51 AM
> Subject: Re: Storage Node - Disk Space Metric

> >
> > 1) Should we include both metrics? Overall disk space use & data files disk
> > space used? We could only hope that having the two metrics will make it
> > easier for users to understand what they are.
> 
> I think two metrics is a good idea.  We must have a way to easily alert
> on a disk space consumption.  The Iteration-3
> Calculated.PartitionDiskSpaceUsedPercentage metric is useful
> information: How much of my used disk space is due to my storage node?
> But it's mainly useful to help understand if a disk space issue is or is
> not due to the storage node.  We need the Iteration-3
> Calculated.PartitionDiskSpaceUsedPercentage metric for alerting on
> excessive disk space for the storage node partitions. Of course we'd
> need two names that describe the distinction.  I think both metrics
> should be on the same resource as they are related.
> 

If we put the two metrics on the same resource (Cassandra Storage Service) how could we prevent confusion over the meaning of the two metrics? 

How about these two names: Calculated.DataDiskSpaceUsedPercentage & Calculated.SystemDiskSpaceUsedPercentage


Thank you,
Stefan Negrea


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