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Hi! With the help of Oliver Freyermuth i rewrote the script
/usr/share/xrootd/utils/XrdOlbMonPerf
which in documentation is referenced as cms_MonPerf
http://xrootd.org/doc/dev410/cms_config.htm#_Toc8247264

in the form that can be seen here:
https://github.com/adriansev/bin-scripts/blob/master/cms_monPerf

w.r.t to old script i would have some questions :
1. what would be the proper name to have
2. i seen that both cms.perf and the script have some timing arguments
moreover the ols script is supposed to run in the loop ...
what is the relation between cms.pref int parameter and the "interval" 
argument that the script is supposed to have?
3. is it really relevant for memory load to take into account the 
buffers and cache?

i assumed that :
1. -m <shmkey> option is something too old to be cared about
2. -n netspeed have no meaning because either it is know directly
or, for virtio interfaces, even the human admin cannot determine it
(so for virtio interfaces the net load will be always 0)
3. -I netintf this was also skipped as the net load will be taken as the 
maximum of all physical up interfaces, with the assumption that on the 
xrootd data server at least 1 interface is dedicated to xrootd server 
and that is the most utilized.

the script make use only of awk and assumes linux.

Thank you!
Adrian


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