The LFC (LCG File Catalog) is a catalog containing logical to physical file mappings. In the LFC, a given file is represented by a Grid Unique IDentifier (GUID). A given file replicated at different sites is then considered as the same file, thanks to this GUID, but (can) appear as a unique logical entry in the LFC catalog.
The LFC supports Oracle and MySQL as database backends.
Services and Ports
For the LFC server daemon, the port 5010 has to be open locally at your site.
For the LFC Data Location Interface (DLI), the port 8085 also has to be open.
For the information system the port 2170 has to be open locally at your site. It has to be visible by the site BDII.
2170 ldap 5010 lfc daemon 8085 lfc-dli
Installation of a LFC with MySQL
The repositories are placed in directory /etc/yum.repos.d/.
All yum *.repos are available at http://grid-deployment.web.cern.ch/grid-deployment/glite/repos/3.2
The needed repositories are:
dag.repo glite-LFC_mysql.repo lcg-CA.repo
Get them with
cd /etc/yum.repos.d/ rm -f /etc/yum.repos.d/dag.repo wget http://grid-deployment.web.cern.ch/grid-deployment/glite/repos/3.2/dag.repo wget http://grid-deployment.web.cern.ch/grid-deployment/glite/repos/3.2/glite-LFC_mysql.repo wget http://grid-deployment.web.cern.ch/grid-deployment/glite/repos/3.2/lcg-CA.repo
Installing the packages
Now the software has to be installed
yum install glite-LFC_mysql lcg-CA mysql-server
As for most grid services you need a host certificate for the LFC with the right permissions. You can follow the instructions on this page.
Before the configuration script can be run create an empty site-info.def file in the directory /root/yaim/ and add/ adapt the required variables:
INSTALL_ROOT= SITE_NAME= USERS_CONF= GROUPS_CONF= MYSQL_PASSWORD= LFC_DB_PASSWORD=<LFC DB user password> LFC_DB_HOST=<LFC DB host name> LFC_DB=<LFC database name> LFC_CENTRAL=<List of VO names whose catalog is configured as central> # only one central LFC must exist for each VO LFC_LOCAL=<List of VO names whose catalog is configured as local. If this variable is not defined, it is set to $VOS minus $LFC_CENTRAL> VOS= VO_<VO_NAME>_VOMS_CA_DN= VO_<VO_NAME>_VOMS_SERVERS= VO_<VO_NAME>_VOMSES=
In addition some information for the supported virtual organizations have to be set. Please refer to this link.
For the LFC also the groups configuration file is required. For details please refer to this page.
The functions used can be found in file /opt/glite/yaim/node-info.d/glite-lfc_mysql:
LFC_mysql_FUNCTIONS=" config_root_email config_ldconf config_sysconfig_edg config_sysconfig_globus config_sysconfig_lcg config_crl config_host_certs config_vomsdir config_edgusers config_mkgridmap config_bdii_only config_gip_only config_gip_lfc config_gip_service_release config_lfc_user config_lfc_upgrade config_lfc_mysql config_lfc_server config_lfc_dli "
Configuration with yaim
Now, the configuration is done by yaim:
/opt/glite/yaim/bin/yaim -c -s /root/yaim/site-info.def -n glite-LFC_mysql
After successful configuration, you should try to access the LFC from your previously setup user interface. One of the usefuls command to query the LFC is
Before you run the command you have to specify which LFC to query. This can be done via issuing the two commands
LFC_HOST=dgrid-lfc.fz-juelich.de export LFC_HOST
Try afterwards a
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