The lcg-infosites locates resources but to make more detailed queries, for example finding out what version of our software is installed you need logon to a user interface and use the lcg-info command.
The syntax is:-
lcg-info [--list-ce | --list-se] [--bdii bdii] [--vo vo] [--query <some_query>] [--attrs <some_attrs>]
where
--list-ce query a CE (Computing Element)
--list-se query a SE (Storage Element)
--query <some_query> Query to apply e.g. --query 'TotalCPUs>=10'
--attrs <some_attrs> Attributes to list e.g. --attrs 'RunningJobs'
To see what attributes are available:-
lcg-info --list-attrswhich produces output like this:-
Attribute name Glue object class Glue attribute name EstRespTime GlueCE GlueCEStateEstimatedResponseTime WorstRespTime GlueCE GlueCEStateWorstResponseTime TotalJobs GlueCE GlueCEStateTotalJobs TotalCPUs GlueCE GlueCEInfoTotalCPUsUse the "Attribute name" in queries and attributes.
A query expression is formed by using the operators =, <, <=, > and >= to compare an attribute to a value.
When checking on string values * is a wildcard e.g.
--query 'OS=SL*'Query expressions can be ANDed (but not ORed) by combining using a comma e.g.
--query 'TotalCPUs>10,OS=SL*,FreeCPUs>5'
To list more than one attribute form a comma separated list e.g.
--attrs 'RunningJobs,FreeCPUs'For example for MINOS:-
lcg-info --list-ce --vo minos.vo.gridpp.ac.uk --query 'CE=*.rl.ac.uk*' --attrs EstRespTime,TotalCPUs,Memory,ClockSpeedTo see how heavily loaded a site is, for example the RAL Tier 2, omit the --vo option to see all VOs:-
lcg-info --list-ce --query 'CE=heplnx206.pp.rl.ac.uk*' --attrs TotalJobs,WaitingJobs,RunningJobs
For more information see
lcg-info --help (press q to quit)and @ LCG-2 User Guide: lcg-info