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rrdtool update sss.rrd 1174477592 : NaN:0:0.0251:0.0248:0.0249:0.025:0.025:0.0251:0.0251:0.0251:0.0252:0.0254:0.026 |
Architecture
The scripts that produce the Pinger data files and the RRD files are placed at : /afs/slac.stanford.edu/package/pinger/smokeping (Added by AmberZeb 03/07/2012)
The scripts that produce the RRDs are located in /afs/slac/g/scs/net/netmon/pinger_smokeping/bin.
The CGI scripts are located in /afs/slac/g/www/cgi-wrap-bin/net/shahryar/smokeping.
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overview of the how the files interrelate; how the program scripts are run (detail of the cron jobs etc). |
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monitor.niit.edu.pk monitor.niit.edu.pk_monalisa.niit.edu.pk_1000_10 monitor.niit.edu.pk_monalisa.niit.edu.pk_100_10 monitor.niit.edu.pk_www.niit.edu.pk_1000_10 **** |
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The four stars separate the information of one monitoring site from the other. The benefit of this srcdest.txt file is that a list of keys against which the converted data is available, is formed so that when a user clicks on one item in the list the graph.cgi can plot the converted data against the key. Conversely if the file was not there, and the user entered his choice of monitoring site, remote site, ping packet site, number of ping packets hoping that the data for this combination is present, he might be wrong. It's easy for the user to select what exists, then to let him guess by allowing him to make the selection.
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Detailed description can be found at http://maggie.niit.edu.pk/newwebsite/federation_projectdesc2.html MAGGIE - SEECS - Smokeping.
Performance Analysis
In order to get list of unique Source Destination pairs (links) SelectSrcDest1.pm used to traverses through all the raw pinger files for the last 120 days and generated the list. This was extremely expensive in terms of time consumed so we needed to reduce this. This was reduced to one day which made the code 120 times more faster.
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CreateRRD took:38 wallclock secs (19.76 usr 3.99 sys \+ 2.57 cusr 0.82 csys = 27.14 CPU) CreateRRD took:38 wallclock secs (20.06 usr 3.39 sys \+ 2.46 cusr 0.84 csys = 26.75 CPU) CreateRRD took:67 wallclock secs (21.25 usr 9.75 sys \+ 2.49 cusr 1.03 csys = 34.52 CPU) CreateRRD took:66 wallclock secs (21.19 usr 9.06 sys \+ 2.73 cusr 0.90 csys = 33.88 CPU) CreateRRD took:68 wallclock secs (20.97 usr 9.47 sys \+ 2.78 cusr 0.74 csys = 33.96 CPU) CreateRRD took:68 wallclock secs (20.80 usr 9.40 sys \+ 2.44 cusr 0.96 csys = 33.60 CPU) CreateRRD took:23 wallclock secs (19.19 usr 0.86 sys \+ 2.27 cusr 0.91 csys = 23.23 CPU) CreateRRD took:23 wallclock secs (19.09 usr 1.13 sys \+ 2.55 cusr 0.92 csys = 23.69 CPU) CreateRRD took:66 wallclock secs (21.13 usr 8.45 sys \+ 2.53 cusr 0.93 csys = 33.04 CPU) CreateRRD took:67 wallclock secs (21.24 usr 9.61 sys \+ 2.23 cusr 0.91 csys = 33.99 CPU) |
I I created the same 10 RRD files on local disk, clearly its less expensive to write to local disk.
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Interpreting the Graph
Smoke colors
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