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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
I need a little help understanding the values put into the rtstats files.I've named the files with the ldmhost_ldmversion_feedtype_product_origin, so this is one NEXRAD2 file
### my pqact entry is:
# rtstats-LDMVERSION/LDMHOST/FEEDTYPE/PRODUCT_ORIGIN
ANY ^rtstats\-(.*)\/(.*)\/(.*)\/(.*)
FILE -close /home/ldm/data/rtstats/\2/\3/rtstats_\2_\1_\3-\4
rtstats_bigbird.tamu.edu_6.10.1_NEXRAD2-rpga1-phmo.nexrad.noaa.gov_v_idd.unidata.ucar.edu
One thing I don't understand is why the "product_origin" comes across as "rpga1-phmo.nexrad.noaa.gov_v_idd.unidata.ucar.edu"
Why the _v_ ?Next I have questions about the data. From the rtstats man page and one example line from the file:
Creation-time of most recent product
this file has: 20130528155822
Product-queue insertion-time of most recent product
this file has: 20130528155824
Receiving host (eg localhost id)
this file has: bigbird.tamu.edu
Feedtype
this file has: NEXRAD2
Origin host
this file has: rpga1-phmo.nexrad.noaa.gov_v_idd.unidata.ucar.edu
Products received this hour
this file has: 72
Bytes received this hour
this file has: 2656522
Latency of most recent product
this file has: 1.20964
Average latency of products received this hour
this file has: 1.12
Peak latency@min/sec past hour
this file has: 3@2829
Version of LDM running on localhost
this file has: 6.10.1
I'm supposing the "Latency of most recent product" applies to the same
product that has these datetimes for "Creation-time" and "Product-queue
insertion-time". Is this latency in seconds? tenths of seconds?
And seconds also for Average latency this hour?Now this "Peak latency@min/sec past hour" throws me for a loop. Is this latency "at" minutes "or" seconds? minutes "and" seconds? And this is a measurement of the peak for "the past hour"? So, if an rtstats entry has an Creation-time of 20130528161521 - that's a meager 15 minutes after the top of the hour - is this peak for the part of the current hour? In this case, the "peak" is for the past 15 minutes? Example:
20130528161521 20130528161521 ... latency: 0.648148average latency: 1.14 (this is or is not the average latency since 20130528160000 ?)
and Peak latency@min/sec past hour: 2@0318 could be read as? maybe: "peak latency of 2 seconds over a period of 3 mins and 18 seconds?" or"peak latency is rate of 2 seconds latency averaging over 3 mins and 18 seconds period of time?"
I need to explain this stuff to my boss who is very familiar with such as latency in microseconds for packets over ethernet. Wish me luck!
Thank you, Donna -- Donna Cote Senior Research Associate The Academy for Advanced Telecommunications and Learning Technologies Texas A&M University 3139 TAMU College Station, Texas 77843-3139 Office: (979) 862-3982 Fax: (979) 862-3983 http://academy.tamu.edu/
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