LFC General Description
Description
The LFC (LCG File Catalog) is a catalog containing logical to physical file mappings. Depending on the VO deployment model, the LFC is installed centrally or locally.
The LFC is a secure catalog, supporting GSI security and
VOMS.
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 allows to see the logical file names in a hierarchical structure :
lfc-ls -l /grid/dteam/production
-rw-rw-r-- 1 107 105 786 Feb 23 17:22 1140711751-file.txt
-rw-rw-r-- 1 107 105 786 Feb 23 17:26 1140711971-file.txt
-rw-rw-r-- 1 107 105 786 Feb 23 17:27 1140712023-file.txt
-rw-rw-r-- 1 107 105 786 Feb 23 18:54 1140717282-file.txt
-rw-rw-r-- 1 107 105 786 Feb 23 18:58 1140717524-file.txt
-rw-rw-r-- 1 107 105 786 Feb 23 18:59 1140717546-file.txt
lrwxrwxrwx 1 18947 2688 0 Jun 02 14:57 my-file -> /grid/dteam/tests/my-file
How to install/administer it ?
The LFC can be installed :
For details, refer to the
LFC Admin Guide
.
How to run the LFC as a service ?
This
LFC Administration for Tier2s
presentation explains how to run and support an LFC service at your site.
Questions ?
Please contact
GGUS helpdesk for support
--
SophieLemaitre - 19 Jun 2006