Format of data etc
Saving
The most likely data to be of use to others is the analyzed/aggregated data. This is kept in
/nfs/slac/g/net/pinger/pingerreports/hep/
There is a lot of data so you will need a lot of space. I suggest you use the /tmp ditrectory as intermediate storage, do one metric at a time (e.g. average_rtt), one size (e.g. 100) and one by (e.g. by-node). If this does not work send an email to unix-admin temporary requesting space in /afs/slac/public/users/cottrell (this is accessible from anonymous FTP). Note you will need space for the copied directory and for the tar's and zipped file. I requested 100Gbytes.
For 1 metric (average_rtt)
$mkdir /afs/slac/public/users/cottrell/average_rtt-100-by-node
$cp -v /nfs/slac/g/net/pinger/pingerreports/hep/average_rtt/average_rtt-100-by-node* /afs/slac/public/users/cottrell/average_rtt-100-by-node
#There are about 6500 files per metric. Copy takes about 20 mins per metric.
$tar -cvzf /afs/slac/public/users/cottrell /archive-average_rtt-100-by-node.tar /afs/slac/public/users/cottrell/average_rtt-100-by-node/average_rtt-100-by-node
#A metric takes about 6 minutes to tar and compress and each tar file occupies ~ 1.5GBytes.
For all metrics with 100Byte pings by node
$mkdir /afs/slac/public/users/cottrell/metrics-100-by-node
$cp -v /nfs/slac/g/net/pinger/pingerreports/hep/*/*-100-by-node* /afs/slac/public/users/cottrell/metrics-100-by-node
$tar -cvzf /afs/slac/public/users/cottrell /archive-average_rtt-100-by-node.tar /afs/slac/public/users/cottrell/average_rtt-100-by-node
However:
$ls /nfs/slac/g/net/pinger/pingerreports/hep/*/*-100-by-node*
/bin/ls: Argument list too long.
Exit 1
To provide maximum flexibility we decided to write a script (pinger-tar.pl) to copy and tar the data.
The directory looks as follows:
[cottrell@pinger ~]$ ls -l /afs/slac.stanford.edu/public/users/cottrell/*.tar
-rw-rw-r-- 1 cottrell sf 512297529 Sep 11 16:33 /afs/slac.stanford.edu/public/users/cottrell/MOS-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 755387730 Sep 11 17:00 /afs/slac.stanford.edu/public/users/cottrell/alpha-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 1640854797 Sep 11 13:58 /afs/slac.stanford.edu/public/users/cottrell/average_rtt-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 293583749 Sep 11 18:59 /afs/slac.stanford.edu/public/users/cottrell/conditional_loss_probability-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 259801856 Sep 11 19:40 /afs/slac.stanford.edu/public/users/cottrell/duplicate_packets-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 1018523005 Sep 11 14:27 /afs/slac.stanford.edu/public/users/cottrell/ipdv-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 751314261 Sep 11 16:16 /afs/slac.stanford.edu/public/users/cottrell/iqr-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 1896982390 Sep 11 18:03 /afs/slac.stanford.edu/public/users/cottrell/maximum_rtt-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 297380470 Sep 11 19:53 /afs/slac.stanford.edu/public/users/cottrell/minimum_packet_loss-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 1464424282 Sep 11 13:16 /afs/slac.stanford.edu/public/users/cottrell/minimum_rtt-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 240217457 Sep 11 19:24 /afs/slac.stanford.edu/public/users/cottrell/out_of_order_packets-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 425757104 Sep 11 15:54 /afs/slac.stanford.edu/public/users/cottrell/packet_loss-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 1995419214 Sep 11 15:33 /afs/slac.stanford.edu/public/users/cottrell/throughput-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 587342674 Sep 11 18:39 /afs/slac.stanford.edu/public/users/cottrell/unpredictability-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 273680921 Sep 11 18:16 /afs/slac.stanford.edu/public/users/cottrell/unreachability-100-by-node.tar
-rw-rw-r-- 1 cottrell sf 269081359 Sep 11 19:15 /afs/slac.stanford.edu/public/users/cottrell/zero_packet_loss_frequency-100-by-node.tar
The compression ratio is about 3.2:1.
To increase the number of files we could change the ping size from 100 to 1000 (in average_rtt-100-by-node* for example) and the by-node to by-site, i.e. a factor of 4.
As of 9/13/2014 there are about 20GBytes of data and 100,000 files.
Nb the following files do not gunzip:
[root@sc2u0n0 afs]# find . -name "*.gz"
./slac/public/users/cottrell/conditional_loss_probability-100-by-node/conditional_loss_probability-100-by-node-1998-02-20.txt.gz
./slac/public/users/cottrell/minimum_packet_loss-100-by-node/minimum_packet_loss-100-by-node-2004-07-18.txt.gz
I get:
268cottrell@pinger:/afs/slac/public/users/cottrell/conditional_loss_probability-100-by-node$gunzip /tmp/conditional_loss_probability-100-by-node-1998-02-20.txt.gz
gzip: /tmp/conditional_loss_probability-100-by-node-1998-02-20.txt.gz: invalid compressed data--crc error
gzip: /tmp/conditional_loss_probability-100-by-node-1998-02-20.txt.gz: invalid compressed data--length error
Retrieving
The data is available via anonymous ftp via ftp://ftp.slac.stanford.edu/users/cottrell, see here for more on retrieving the data. For more information see: http://www-iepm.slac.stanford.edu/pinger/tools/retrievedata.html.