1. Is Windows Right for High-Availability Enterprise Applications? Dan Kusnetzky, Vice President System Software Research IDC

2. IDC © 2002 Agenda What are “Enterprise Applications?” IDC’s Spectrum of Scalability? What is “High-Availability?” What are the 7 meanings of the term “cluster?” IDC’s spectrum of availability software How the vendors stack up Questions?

3. IDC © 2002 What are “Enterprise Applications?” All organizations are “enterprises” Regardless of revenues or the number of employees Vendors use the term “enterprise” to imply things which may or many not be true

4. IDC © 2002 What are “Enterprise Applications?” Questions to ask your suppliers Does this application or tool have a direct impact on: Each customer? Each employee? Each partner or supplier? If the answers are “no” then it’s not an enterprise application Will the organization go out of business without this application?

5. IDC © 2002 IDC’s Model of Scalability Complex/Small Simple/Small Complex/Large Simple/Large Complexity Transactions/Day

6. IDC © 2002 VS. Various Ways to Scale Multifunction vs. Functional Servers Systems have defined functions Database Applications or application components Load-balanced Web servers Storage

7. IDC © 2002 What is “High Availability”? Applications and Data remain available beyond the life of its host There are many ways to achieve this High Availability solutions could include Application fail over Middleware Serverware Storage software

8. IDC © 2002 What’s a Cluster Among Friends? The Goal: harnessing the power of many machines to create a single virtual environment Each approach is selected by different people for different needs Parallel processing Load balancing High availability/fail over Single system image Application fail over Storage availability and performance

9. IDC © 2002 Some “Clustering” History VAXcluster and IBM’s Parallel Sysplex: high water marks Unix Clustering: Behind but catching up Linux: evolving from Web load balancing and HPTC to more commercial approaches Storage Software Suppliers: Data availability and application fail over Microsoft – Taking a Different Approach

10. IDC © 2002 Load Balancing or Parallel Processing Monitor Two to thousands of independent loosely-linked systems Multiple systems have copies of applications and data Applications run on all systems Monitor distributes workload among the available systems Distribute loads using round-robin, request or capacity model Data synchronization and administration can be challenges

11. IDC © 2002 High Availability Monitor Two to 32 systems cooperating to create a single environment. Multiple systems have copies of applications and data. Applications run on all systems. Communicate with a high availability monitor through special APIs. Data accessed through a parallel database or special APIs. Monitor notifies systems of an outage so applications can respond. Load balancing may not be available. Run applications in parallel for improved performance. Run multiple copies of applications to improve scalability, Administration can be challenge.

12. IDC © 2002 Clustering Monitor Two to 32 systems tied tightly together. Multiple systems have copies of applications and data. Applications are run on all systems. Data can be accessed through a parallel database or directly as if on a single system. It may not be necessary to use special APIs. Monitor notifies systems of an outage so the operating environment can respond. Applications can be run in parallel for improved performance. Multiple copies of applications can be run to improve scalability. Everyone sees a single virtual environment.

13. IDC © 2002 High Availability Applications Two to thousands of systems cooperating to create a single environment at the application level Multiple systems have copies of applications and data Applications are run on all systems Application contains logic to handle failure scenarios Other applications may not benefit Administration can be challenge

14. IDC © 2002 High Availability for Storage Storage servers via NAS or SAN Storage replication Fail-over manager virtualizes storage

15. IDC © 2002 Microsoft’s Traditional Strategy Own the the following, and you own the customer’s systems APIs Development tools File formats Communications architectures Create incompatibilities drive customers to use only Microsoft products Only Microsoft created “standards” are fully supported; others are not

16. IDC © 2002 Microsoft’s Approach to Clustering and High Availability Solutions Philosophy Let our software do it – we know more about your needs than you do Microsoft software everywhere, doing everything Everything is legacy: should be encapsulated and eventually replaced with a Windows solution even if it working productively

17. IDC © 2002 Microsoft’s Approach to Clustering and High Availability Solutions Layers Presentation (IIS, Site Server, SNA Server) Business logic (Application Center 2000, COM+) Data access and storage (SQL Server 2000, Windows 2000 now, Windows.NET Server in the future, Microsoft cluster services)

18. IDC © 2002 How the Vendors Stack Up Microsoft Application Center 2000 Red Hat High Availability Server TurboLinux Cluster Server Legato Cluster Server IBM HACMP Microsoft MSCS Mission Critical Linux Convolo Veritas Cluster Server Compaq TruCluster for VMS or TruCluster for Tru64 UNIX HP MC/Service Guard Sun Cluster 3.0 Caldera/SCO Non-stop Cluster for UnixWare Open Source Beowulf, LVS and others TurboLinux EnFuzion Platform Computing LSF Sun Gridware Parallel Processing Load Balancing High Availability Clustering Manager Monitor Monitor

19. IDC © 2002 Clustering and High Availability Software Market Drivers B2B, B2C and in-house applications can not appear to slow down or to fail Staff with necessary skills are difficult to find and costly Clustering and high availability software is: Difficult to install, configure and use today Will be much easier over time Directed by operating environment adoption Open Source alternatives limit potential for revenue growth

20. IDC © 2002 Is Windows Right for High-Availability Enterprise Applications? Today’s Answer: A definite maybe. Some applications are served well by highly distributed architectures Low intensity of interdependent data Algorithm allowing decomposition Some applications are better when hosted on a single, medium or large scale system High intensity of interdependent data Monolithic application architecture Tomorrow’s Answer: As the Eight Ball says “signs point to yes”

21. IDC © 2002 Questions dkusnetzky@idc.com

22. IDC © 2002 Related Research IDC#24798 - Clustering and High-Availability Software Market Forecast and Analysis, 2001-2005 IDC#24844 - Linux Operating Environments Software Market Forecast and Analysis, 2001-2005 IDC#24827 - Windows Operating Environments Market Forecast and Analysis, 2001-2005 IDC#24799 - Web-Centric Computing Software Market Forecast and Analysis, 2001-2005 IDC#24846 - Server Storage Software Market Forecast and Analysis, 2001- 2005 IDC#24851 - Unix Operating Environments Market Forecast and Analysis, 2001-2005