1. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Digitask Seminar November 29, 1999 Digitask Consultants, Inc. BRILL@DIGITASK.COM Marlene Brill 212-682-6652 digitask@digitask.com

2. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts What is a Cluster ? Why Do I Want/Need This ? What Is The Cost Benefit ? Where Does It Fit In ? (Easily Integrates) Seamless Transitions From Non-Clustered Systems (No Service Interruptions)

3. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts

4. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Enterprise Solutions –Highly available 99.999% (About 5 Minutes Of Unplanned Downtime Per Year.) –Cost Of Downtime May Be Large ! (Direct & Hidden Costs) –Fast Access To All Resources. –Hardware Scalable, Tailorable & Reliable, To Your Solution. (Consistent Upgrade Path)

5. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Departmental Level –Highly Available Solutions For Critical Information Delivery. –Price/Performance Functionality. –Fast Delivery Systems To End User.

6. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts End User Level –Highly Available For Must Have Local Applications. –Fast Localized Information Processing & Display. – Dependable RAID Storage At The User Level

7. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Three Tiered Client Server Solutions –Enterprise –Departmental –End User

8. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Cluster Hardware Management  System Components (Servers, Multiprocessors, Memory)  Easier If Homogeneous (Identical Configurations)  New Clusters Alpha Systems  Typically Large Memory Systems  Departmental (4100) vs Enterprise (8000 series or newer)

9. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Cluster Hardware Management  Interconnects:  CI  DSSI  FDDI  Memory Channel  SCSI  Fibre Channel  Ethernet

10. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts Storage Array

11. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts OpenVMS Cluster Software Components  Data Management -- RMS  Relational Database Management -- Oracle  Cluster-wide Utilities -- Show Commands  Distributed Lock Manager -- Allows Shared Access To Cluster Resources  Distributed Job Controller -- Allows Cluster Sharing Of Batch & Print Queues.

12. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts OpenVMS Cluster Software Components  Connection Manager --Controls Membership & Quorum Of Cluster Members  System Communication Services (SCS) -- Cluster Communications Between Nodes (SCA)  MSCP & TMSCP Servers -- Allows Local Disks & Tapes To Be Used Across Cluster.

13. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts OpenVMS Redundancy Guarantees Availability

14. Copyright ©2003 Digitask Consultants Inc., All rights reserved Wide Area Cluster Concepts Definition of Wide Area Cluster (WAC) >Some Nodes Separated from Others >Implies Separate Computer Facility >Distance Varies

15. Copyright ©2003 Digitask Consultants Inc., All rights reserved Types Of WAC Remote Cluster Node Multi-site Cluster Disaster Tolerant Cluster >Duplication Of Hardware

16. Copyright ©2003 Digitask Consultants Inc., All rights reserved Wide Area Cluster

17. Copyright ©2003 Digitask Consultants Inc., All rights reserved WAC Shadow Data Move

18. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Database Concepts Paul Baumgartel Clustered Oracle Parallel Server –High Availability –Load Balancing –Optimized Throughput –Oracle Version 7 Limitations

19. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Concepts - Paul Baumgartel ORACLE Version 8 –Cache Fusion No More Long I/O Waits –Faster Inter-Process Communication –Distributed Lock Manager Integration

20. Copyright ©2003 Digitask Consultants Inc., All rights reserved Cluster Summary Higher Performance Via Digitask’s Proprietary Methodologies. Guaranteed Price/Performance Benefits. Non-Intrusive Cluster Management & Platform Upgrades. Total Solutions FOR ONE PRICE