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On 6/17/19 11:50 PM, Andrew Hanushevsky wrote: > Hello Adrian & Oliver, > >> just to chime in - I have fallen into the very same trap :-(. >> But that easily explains why I did not notice any load balancing effects. > Yes, the issue here is that the "sched" directive is used by the > redirector and the "perf" directive is used by the data server. That > means, depending on how you structured your config file, catching the > discrepancy is not assured. That said, yes, the documentation should > make it clear that cms.perf needs to be specified on the data server > side. if you want to load balance. > >> While I fully agree a working default would be good, > The first issue is to where to put the script so that it could be > uniformly invoked. Since there was no good place, we decided to not to > make a default (that's explicitly stated in the documentation). well, the current place is as good as any .. i do not see why should be a special place.. and also it makes sense /usr/share/xrootd/utils/ >> the script shipped with XRootD right now is mostly useless on modern >> systems - it only works with CentOS 6 and older since it hardcodes the >> expected >columns from netstat output, > That's the second reason for there being no default. Load collection > scripts are, by necessity, sensitive to the OS and OS version being > used. Since we couldn't guarantee that the script would do anything > useful for future OS's, making it the default didn't seem like a good > idea. Frankly, I still think a default is not a good idea as you really > need to verify the script works for your particular OS. I suppose we > could make that more clear in the docs. well, this decision created the fact that a advertised functionality _silently_ is not working! which IMHO is not ok .. i see only two options : either use no matter how broken script as default to have a minimal functionality AND warn more or less loudly that cms.perf was not explicitly set with a script or complain really loud in logs in both redirector and servers that the the cms.sched is not properly setup (on servers complain about the lack of cms.perf) >> I'd be willing to fix this ot just use the kernel interface from >> procfs: /proc/net/dev > That would be greatly appreciated :-) well, i had a head-start :) https://github.com/adriansev/bin-scripts/blob/master/cms_monPerf but i really do no like the vmstat usage, i will change to use something directly like /proc/stat also i do not know what is supposed to be the PGIO Any comments/ideas/feedback about it? Thanks! Adrian ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1