On Sun, 2005-02-20 at 07:54 -0800, Federico Sacerdoti wrote: > On Feb 19, 2005, at 10:18 PM, Andrew Sapronov wrote: > > > $telnet localhost 8652 > > / > > > > will return a last dump of information. > > > > Can I recieve all data for a certain period of time? > > For example for the last hour or for december, 2004. > > Where can I get information about all possible parameters. > > You are going straight for the jugular! We have only a lossy method of > tracking metrics, so retrieving high-fidelity data for an hour long ago > is not possible. I see, such restriction is applied because of RRD usage. Then what do you think for example about the filter
/my_cluster/some_host?filter=primary which will return high-fidelity data for an hour step-by-step. In addition i can change primary data period (rrd_helpers.c). I tried to make this type of filter (vua using rrd_fetch), but you see the gmetad design doesn't allow to add your own filters simply. Could you advise me something? > I believe there is some work on using a real SQL > database to store history, however. I suppose RRD is quite enough, but still it would be a good feature to change RDD parameters run-time not compile-time and perhaps different parameters for different metrics. > > The parameters to gmetad's port 8652 (interactive) are very simple: > > Possibilities > 1. Give a path name: > /Alpha > > will return the ganglia tree of the cluster named "Alpha" if there is > one. > > /Alpha/compute-0-0 > > Will return the ganglia tree of a host 'compute-0-0' in cluster Alpha > if there is one. You mentioned nothing about metrics. Is this feature planned to be removed? /Alpha/compute-0-0/some_metric It works. I was discouraged when recieved the metrics and saw what part of the message "<METRIC..." takes in contrast to (comparing with) DTD. Why DTD is not used in the form of: <!DOCTYPE configuration SYSTEM "URL">. Besides this way is recommended. So large DTD invalidates the expediency of separate metric request. Andrew Sapronov J.
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