Gfarm is anetwork sharedfilesystem andalternative toNFS, butoptimized forreliability,scaling andaccess fromwide areanetwork. It canfederate localdisks ofnetwork-connectedPCs and computenodes inseveralclusters, andsupportsexplicitreplicalocationcontrol byusers. Pluginsexist for FUSE,Zabbix, Hadoop,Samba, MPI-IO,GridFTP, and aLinux kernelmodule is underdevelopment.