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 believe there is some work on using a real SQL
database to store history, however.
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.
2. Give a filter
/Alpha?filter=summary
will give a summary (shortened: metric sums) of the cluster named
Alpha. Currently the only filter is "summary". This filter works for
grids and clusters, but does nothing for hosts.
If there are any errors, the full tree is returned.
And what about the compression of this data?
For a lot of n
odes the compression can reduce the amount of the data
essentially.
There is always a tradeoff between compute and network resources with
compression. If you have fast networks and highly stressed nodes,
compression is bad. It also hurts response time for the web frontend.
If you have thin networks and lots of free cycles (PlanetLab for
example) then compression is good. Matt had some code to give you a
choice, not sure on its status.
-Federico
I'm developing the java-client for gmetad and could realize support for
comression in gmetad. For example with zlib.
Thanks
Andrew Sapronov J.
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real
users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
_______________________________________________
Ganglia-developers mailing list
Ganglia-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ganglia-developers
Federico
Rocks Cluster Group, San Diego Supercomputer Center, CA
