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| shared disk file systems | |
| university of minnesota software | |
| red hat | |
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GFS differs from Distributed File System s (such as AFS , Coda , or InterMezzo ) because it requires all nodes to have direct concurrent access to the same shared Block Storage . GFS has no disconnected operating-mode, and no client or server roles. All nodes in a GFS cluster function as peers. System administrators often use Fibre Channel , ISCSI , or AoE devices for GFS shared storage. GFS depends on a Distributed Lock Manager like GULM or DLM . GFS comes as Free Software , distributed under the terms of the GNU General Public License .
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