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: 0.648148
average 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/
