Copyright © 2000,2003 Storage Networking Industry Association “Iconic images” from the SNIA shared storage model These slides are a subset of the images from the shared storage model that can serve as a set of “icons” that can be used in publicity material. The “speaker notes” supply additional important commentary. This revision: last content update last graphics update

2Copyright © 2000,2003, Storage Networking Industry Association Obligatory rubric  Copyright © 2000,2003 Storage Networking Industry Association (SNIA).  SNIA-TC members may use this material freely; all others must conform to usage notes in the speaker noted for this slide.  See SNIA-SSM-colors.ppt for printing and color/graphics conventions.

3Copyright © 2000,2003 Storage Networking Industry Association Classic storage model (a Negative Example!) Application Storage domain: “anything goes!” Network? Appliance? Data mover? Array? NAS? JBOD?

4Copyright © 2000,2003 Storage Networking Industry Association The SNIA storage model Overview File/record layer Block layer Storage devices (disks, …) Database (dbms) File system (FS) Storage domain Services Network Host Device Block aggregation Application

5Copyright © 2000,2003 Storage Networking Industry Association The SNIA storage model Simplified functional partitioning Device block-aggregation Network block-aggregation Host block-aggregation Host. with LVM and software RAID 1. Direct-attach File/record layer Block layer NAS server 4. NAS server Host. with LVM Disk array 2. SN-attach Host 3. NAS head NAS head Host LAN Application SN

6Copyright © 2000,2003 Storage Networking Industry Association Device block-aggregation Network block-aggregation Host block-aggregation The SNIA storage model Other aggregation models File/record layer Block layer Disk array LAN Host 2. File metadata File metadata server SN Host. with LVM Application Aggregation appliance 3. SN appliance 1. Block metadata Block metadata server

7Copyright © 2000,2003 Storage Networking Industry Association Device block-aggregation Network block-aggregation Host block-aggregation The SNIA storage model Full function-partitioning view Host. with LVM and software RAID 1. Direct-attach File/record layer Block layer NAS head 4. NAS head 2. SN-attach Host. with LVM Disk array SN 5. SN aggregation Aggregation appliance Block metadata server File metadata server 6. Metadata aggr’n 3. NAS server LAN Host NAS server Application

8Copyright © 2000,2003 Storage Networking Industry Association The SNIA storage model Multi-site block storage Device block-aggregation Network block-aggregation Host block-aggregation Disk array SN Aggregation appliance Host. with LVM Application Disk array Aggregation appliance Host. with LVM Application SN appliance WAN Host-to-host Functions: point-in-time copy, caching, local & remote mirroring, … WAN Device-to-device File/record layer Block layer