Peter Cornillon wrote:
Hi Rich,
I was at a NASA meeting this week in which we were discussing metrics
for NASA related projects. As a result of the discussion, we decided to
experiment with a metrics group at Goddard. What I want to do is to
develop a general evaluation of http logs from OPeNDAP enabled servers.
The idea would be to generate a consistent set of stats from these
servers. The job of sorting out stats can be divided into two parts, one
part that is OPeNDAP specific - how many das, dds,... accesses, how many
data accesses, what the volume of the data access was,... The second
part is provider specific, what constitutes a dataset at that site. We
will be experimenting with a Hyrax and a GDS server, but I'm assuming
that much of the OPeNDAP specific info would be the same for a TDS. In
addition to these one would probably want to know how many WCS accesses
or other accesses were made for a TDS. Assuming that we make good
progress on the servers that we will be messing around with, it might
make sense to extend the project in the not too distant future to TDS.
Comments?
Peter
Hi Peter:
That would be very welcome.
The TDS uses standard apache log format, but we also advise to append the
amount of (wall clock) time it took to process the request. Its up to the
individual user to do this, however. Im not sure what Hyrax/GDS uses as a log
format.
The TDS uses a very regular URL naming schema that makes it straightforward to
figure out the service used. extracting the dataset name is slightly more
complicated. I can send some code snippets if anyone is interested.
