1. SQL Server on a Cluster Experiences Mike FITZSIMON SYSTEMSARCHITECT F ITZSIMON IT C ONSULTING PTY LTD

2. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Why use SQL Server on a Cluster? High Availability Fault Tolerance (?) Failback Manageability Scalability (?)

3. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Hardware Architecture – Single Tier Web Server Business Logic COM Components SQL Server

4. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Hardware Architecture – Two Tier SQL Server Database Server Web Server Business Logic COM Components

5. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Hardware Architecture – Three Tier SQL Server Database Server Business Logic COM Components Web Server

6. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Hardware Architecture – Scalable Three Tier SQL Server Database Server Application Server Farm Web Server Farm

7. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au H/w Architecture - OzEvents.com Router distributes http requests 2-Server Web Farm (Test site on one server) SQL Server (Production & Test databases) Exchange Server

8. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Hardware Architecture – Scalable Three Tier SQL Server Database Server Single point of failure? Application Server Farm Web Server Farm

9. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Server AServer B LAN Hardware Architecture - Cluster Server Two or more Servers Private LAN (heartbeat, <500ms ping) Shared SCSI bus (separate to System SCSI bus) Applications & Data on RAID Private LAN RAID Applications & Data Shared SCSI SCSI

10. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au IMS Locations Brisbane Sydney Melbourne Cluster Servers in each State Office Frame Relay Service

11. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au High Availability Cluster Servers IBM Netfinity 5500 Servers Physical machines named \\Heaven and \\Hell Virtual machines named \\BneSQL and \\BneIIS Required 4 IP addresses !

12. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au High Availability Cluster Servers RAID-1 Mirrored internal disk drives Can be used as an emergency backup during a system upgrade

13. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au High Availability Cluster Servers External RAID array StorageTek Raid-1 9Gb Quorum Disk (persistent arbitration) Raid-5 18 Gb Data disks

14. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au High Availability Cluster Servers External RAID array: Dual Power supplies Dual Network adaptors

15. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Server AServer B LAN Hardware Architecture - Cluster Server Normal Active/Active configuration Server A: IIS & MTS Resource Groups Server B: SQL Resource Group Web pages and SQL MDF files on RAID Private LAN RAID Applications & Data Shared SCSI SCSI

16. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Multi-Node Clusters Still need only two NICs per machine (one for public network, one for private network) Need a Hub To support at least 4-nodes, need Windows Server 2003 Enterprise Edition or Windows Server 2003 Datacenter Edition Windows Clustering is installed by default; configure a cluster by starting Cluster Administrator or Cluster.exe

17. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Writing your own Cluster-Aware Application LooksAlive (By default, SQL calls this every 5 seconds) IsAlive (By default, SQL calls this every 60 seconds)

18. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Clustering Resources Quorum Drive Configuration Information http://support.microsoft.com/?id=280345 Available Features in Windows Server 2003 Clusters http://support.microsoft.com/?id=278007 Step by step guide to install a 2000 Cluster: http://www.microsoft.com/windows2000/techi nfo/planning/server/clustersteps.asp

19. Fitzsimon IT C ONSULTING PTY LTD www.fitzsimon.com.au Questions Mike Fitzsimon Mike@Fitzsimon.com.au This ppt available from www.fitzsimon.com.au/qmsdnug