We would like to upgrade the xrootd server version for the glast xrootd cluster from version
20080513-1222 to 20080828-1632. The main changes between these two versions are:
The full cvs Changelog is available at http://xrootd.slac.stanford.edu/download/20080828-1632/ChangeLog_to_v20080513-1222
The xrootd client tools are installed in /afs/slac.stanford.edu/g/glast/applications/xrootd We also would like to update the PROD version from 20080513-1222 to 20080728-0933.
The main changes for the 20080728-0933 version are:
We also would like to link the FITS version to PROD.
As every xrootd version basic tests were done reading from and writing to xrootd, and testing the client admin interface (rm, stat, checksum,...).
The new version has been installed as a test version on the glast xrootd cluster which allows access to the glast data. MC jobs were run successfully against it.
The xrootd client version has been installed as TEST, DEV and FITS version in /afs/slac.stanford.edu/g/glast/applications/xrootd. The FITS and DEV versions have been successfully used for production activities.
To switch the servers back to the old version the xrootd configuration has to be reverted to the old version followed by a restart of the old version.
The client version is rolled back by recreating the link to the old version.
https://jira.slac.stanford.edu/browse/SSC-141
The restart should take less then five minutes. Stopping the redirectors first prevents clients being redirected and the chance that a file is not found because a data server is being restarted. The clients will wait during the restart and reconnect to the data servers and redirectors.