Global File System (GFS) is a cluster file-system for operating system distributions based on the Linux kernel. It is used as a shared file-system commonly on share-accessible block storage such as fibre-channel, shared SCSI, iSCSI and FireWire (IEEE 1394) devices. Logical Volume Manager (LVM) is a Linux kernel component and a set of user-land utilities which allow a system-administrator to group physical block storage devices into logical storage pools and create logical block-storage volumes out of them which are more wieldable and manageable and provide some useful features over the partition approach.