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Multiple Data Server Protocols BE INCLUSIVE !! Broaden the market reach Three (or more) flavors of out-of-band metadata attributes: BLOCKS: SBC/FCP/FC or SBC/iSCSI… for files built on blocks OBJECTS: OSD/iSCSI/TCP/IP/GE for files built on objects FILES: NFS/ONCRPC/TCP/IP/GE for files built on subfiles Inode-level encapsulation in server and client code Local Filesystem pNFS server pNFS IFS Client Apps Layout driver 1. SBC (blocks) 2. OSD (objects) 3. NFS (files) NFSv4 extended w/ orthogonal layout metadata attributes Layout metadata grant & revoke |