The time it takes to access a xrootd file is monitored by frequently reading a file with xrdcp and using the debug output to extract the time it tooks for the different steps (e.g.: connect to redirector, connection to data server, open the file).

There are three different files on each of the data server:

file name

comment

/glast/admin/mon_all.tst

This file is the same on each server

/glast/admin/mon_srv.tst

The filename is the same on each server but the content is different

/glast/admin/mon_<serverName>.tst

unique file on each server. <serverName> is the host name of the server, e.g.: mon_wain020.tst

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