1. SAN Design Considerations Hylton Leigh Senior Consultant Novell Consulting, UK Stuart Thompson Senior Consultant Novell Consulting, UK

2. © March 9, 2004 Novell Inc. 2 one Net: Information without boundaries…where the right people are connected with the right information at the right time to make the right decisions. The one Net vision Novell exteNd ™ Novell Nsure ™ Novell Nterprise ™ Novell Ngage SM : : : :

3. © March 9, 2004 Novell Inc. 3 The one Net vision Novell Nterprise is an innovative family of products which gives you the power to enable and manage the constant interaction of people with your business systems — regardless of who they are or where they are. Novell Nterprise ™ Novell exteNd ™ Novell Nsure ™ Novell Nterprise ™ Novell Ngage SM : : : :

4. © February 24, 2004 Novell Inc. 4 Agenda Business Drivers Storage Methodologies SAN Components Design Considerations Storage Cluster Services

5. © February 24, 2004 Novell Inc. 5 Business Drivers Availability Fault Tolerance Consolidation Disaster Recovery Nice new toy!

6. © February 24, 2004 Novell Inc. 6 DASNASSAN Server Application File System Data Storage Methodologies Application File System Client or Server NAS Server Application File System Server RAID Array Data LAN SAN

7. © February 24, 2004 Novell Inc. 7 Storage Costs DAS SAN NAS Implementation Cost Operational Cost

8. © February 24, 2004 Novell Inc. 8 Scale of Storage DAS SAN NAS Availability Scalability

9. © February 24, 2004 Novell Inc. 9 Logical SAN Components Storage Initiator (Client) Storage Target Storage Communication Channel Server NIC, Cluster HBA Storage Controller Discs Cable, SAN Switch/Hub Physical SAN Components

10. © February 24, 2004 Novell Inc. 10 Server NIC iSCSI-based SAN NIC teaming Storage Target Storage Communication Channel

11. © February 24, 2004 Novell Inc. 11 Cluster Node HBA Connects the Cluster Node to the SAN Switch Single or Multiple Cost v. Node Availability Multiple HBA OS, HBA Driver, Multipath software Failover Load Balancing – Dynamic or Static Storage Target Storage Communication Channel

12. © February 24, 2004 Novell Inc. 12 Cable Storage Initiator (Client) Storage Target Storage Often overlooked but critical Fiber Ethernet Copper Protocols FC, iSCSI, FCIP, iFCP

13. © February 24, 2004 Novell Inc. 13 SAN Switch/Hub Connects the Storage to the Cluster Nodes Similarities with LAN switches/hubs Can expand to include discussion of arbitrated loop, switched fabric etc… Edge v Core v Director class switches Zoning Storage Initiator (Client) Storage Target Storage

14. © February 24, 2004 Novell Inc. 14 Storage Controller Storage Initiator (Client) Storage Communication Channel Provides intelligence of the storage Provides caching Snapshot controlled here LUN Masking Security What your cable plugs into How many to have? Connected to Switch/Hub FalconStor type virtualisation devices

15. © February 24, 2004 Novell Inc. 15 Storage Storage Initiator (Client) Storage Target Communication Channel SCSI / Serial ATA / Parallel ATA / FC / Solid State JBOD RAID Virtualisation

16. © February 24, 2004 Novell Inc. 16 Non-physical Components Storage Management Data Replication Data Backup

17. © February 24, 2004 Novell Inc. 17 Storage Management Vendor Specific Scope of Management Industry Standards SNMP SNIA SMI

18. © February 24, 2004 Novell Inc. 18 Data Replication Mirrors Snaps Clones

19. © February 24, 2004 Novell Inc. 19 Data Backup NDMP SAN attached tape library Separate Node for Backup Cluster aware backup software Open File Backup

20. © February 24, 2004 Novell Inc. 20 LUNs / Partitions / Pools LUN is unit of storage presented by SAN LUN can be thought of as a “disk” LUN “owned” by a SAN Controller LUN contains Partition Partition contains Pool Pool contains Volumes Pool is unit of clustering

21. © February 24, 2004 Novell Inc. 21 Presenting storage to nodes

22. © February 24, 2004 Novell Inc. 22 LUN access on SANs Homogeneous SANs LUNs shared by all servers in a cluster – Cluster software controls multi-initiator I/O Heterogeneous SANs LUNs dedicated to standalone servers LUNs shared by all servers in a given cluster LUN access control (masking) Extremely important in heterogeneous SANs Mis-configuration may cause data corruption – Multiple standalone servers fight for a LUN – A cluster and a standalone server fight for a LUN

23. © February 24, 2004 Novell Inc. 23 Design Considerations Number of storage controllers Multipath “Static” load balancing RAID Software - defined per partition Hardware – defined per LUN Profile of Data to be stored Databases vs office apps SBD Partition – separate LUN SAN Booting

24. © February 24, 2004 Novell Inc. 24 Design Considerations 2 Mapping Volumes to Pools One to one Mapping Pools to LUNs One to one, many to one, one to many Spread the workload (2N) Pool Snapshots NSS Pool / Volume features Purge immediate, compression, shredding IO315 – “Understanding the New Novell Storage Services Features in NetWare 6.5”

25. Question and Answer

27. © February 24, 2004 Novell Inc. 27 General Disclaimer This document is not to be construed as a promise by any participating company to develop, deliver, or market a product. Novell, Inc., makes no representations or warranties with respect to the contents of this document, and specifically disclaims any express or implied warranties of merchantability or fitness for any particular purpose. Further, Novell, Inc., reserves the right to revise this document and to make changes to its content, at any time, without obligation to notify any person or entity of such revisions or changes. All Novell marks referenced in this presentation are trademarks or registered trademarks of Novell, Inc. in the United States and other countries. All third-party trademarks are the property of their respective owners. No part of this work may be practiced, performed, copied, distributed, revised, modified, translated, abridged, condensed, expanded, collected, or adapted without the prior written consent of Novell, Inc. Any use or exploitation of this work without authorization could subject the perpetrator to criminal and civil liability.