New question #251104 on Graphite:
https://answers.launchpad.net/graphite/+question/251104

I am trying to fetch a list of metrics via the Render URL API in Graphite, such 
that only one of the matches are returned. For example, the following, 
hypothetical scenario:

os.redhat.server1.disk1.pct_size_used

os.redhat.server1.disk1.pct_inodes_used

So I want to fetch the following for all the disks such that if they are not 
recording "pct_size_used", the API should return their "pct_inodes_used" metric 
instead, but in cases where both metrics are recorded, API should only return 
the "pct_size_used":

os.redhat.server1.*.(pct_size_used|pct_inodes_used)

Any ideas how to do this? I know Graphite uses the Glob function internally to 
search for metrics, and Glob function does not support any such operation. 


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