article

• 1. Managing HA Complexities in Oracle 10g Matthew Hart April 2005

2. Agenda

• The Enterprise Computing Environment

• The Enterprise Grid

• Enterprise Manager Database Control

• Enterprise Manager Grid Control

• Enterprise Manager and RAC

• Managing Grid Componentry

3. The Enterprise Computing Environment

• As big a computer as could be bought

• As small a list of computers as could be managed

• Multiple databases on a single computer

• A highly ritualized set of responsibilities for each professional segment

• Data segregated by function or division

4. Traditional Enterprise Computing Scenario 5. The Enterprise Grid

• As many commoditized computers as can be requisitioned

• Single Database on Many Computers

• Professional divisions rapidly interweaving

• Computing envisioned as a single resource, distributed to divisions based on usage

6. Enterprise Grid Scenario 7. The Enterprise Grid

• The ability to scale out leads to an ever-increasing level of complexity

• DBAs find themselves doing operational architecture, system administration

8. An Increasingly Complex Environment 9. What are the management techniques in a grid computing environment?

• Single database administration

• Enterprise-scale administration

• Database, server, application tier administration

• Oracle Enterprise Manager

• • Database Control

• • Grid Control

• • Completely rewritten from the ground up

10. Enterprise Manager 10g Database Control

• Entirely web-based HTML interface

• Installs as an OC4J application, with a bundled web server

• Single database management only

• The Enterprise Manager repository runs locally within the database itself

• If the database is down, EM can be used for startup/recovery only

11. Enterprise Manager 10g Database Control for RAC

• Database Control is available for cluster databases

• An instance of DB Control runs on each node

• Each instance of DB Control has the same information, as they share the same repository

• Jobs are scheduled at a specific node, and do not failover

12. 13. 14. 15. Enterprise Manager 10gGrid Control

• Entirely web-based HTML interface

• Runs on Oracle iAS platform

• Manages multiple target types

• • Expanded Host Monitoring

• • Databases (clustered, normal, standby)

• • Listener

• • Application Servers/http servers

16. Grid Control (cont.)

• Web Application monitoring

• • End user performance monitoring

• Group Creation for sub-setting monitored targets

• Advanced Notification configuration

• Job management

• SSL security

17. Manageability Grid 18. Managing Database Deployments Using EM Grid Control

• Use Groups to subset your monitored targets into logical sets

• Limit target access at the user and role level

• Configure iSQLplus for http-based sql execution

19. Managing Database Deployments Using EM Grid Control (cont.)

• Monitor ASM volume usage

• • Must reset the login from EM for ASM management to work

• Perform and Manage Backups

• • Monitor FLASH RECOVERY AREA

• • Configure recurring RMAN backup

• • Configure recurring backup housekeeping jobs

20. Managing Database Deployments Using EM Grid Control (cont.)

• Deploy and manage RAC configurations

• • Add and remove RAC nodes

• • Get key cluster monitoring metrics

• • Monitor by clustered database, or by individual database instances

21. Managing Database Deployments Using EM Grid Control (cont.)

• Deploy and manage Data Guard configurations

• • Cannot create Data Guard configurations if archivelogs are on ASM FRA

• • Data Guard cannot create standby database on an ASM volume

• • Any Data Guard configuration can be monitored with Grid Control

22. 23. 24. Managing Host Deployments in Grid Control

• Review host metrics

• • Disk utilization

• • Memory Utilization

• • Top processes

25. 26. 27. 28. Managing Host Deployments in Grid Control

• Review Oracle software deployments

• Get Patch advisories downloaded from metalink

• Compare hosts, or one host to many hosts

• Clone databases as well as oracle homes

• Apply software patches

• • Designed for one off patches only not patchsets

29. 30. 31. 32. 33. Grid Control: Current Personality Traits

• There is no notification for jobs in this release

• • Will be rectified in 10gR2 (late summer 2005)

• There is no end to the amount of information being reported

• • busy page syndrome

• There are data presentation lags

• • A target can be started, but will show as down for a few minutes

34. Grid Control Personality Traits

• Do not even attempt without 2 GB (if repository is on the same server)

• Default repository is 9.0.1.5 (this is an iAS 10g artifact)

• Much integrated functionality is actually separately licensed

35. Grid Control Personality Traits

• Performance Tuning functionality is limited for 8i and 9i databases

• • EM Tuning pack functionality was kernelized into 10g RDBMS (ADDM)

• • Now, EM 10g calls the database to perform tuning functions, instead of doing it natively

• • This means that legacy tuning is curtailed

36. Grid Control: Current Personality Traits

• Grid Control management can be confounding if you are not familiar with Oracle Application Server 10g

• • emctl start oms

• • opmnctl startall/stopall

• • opmnctl status

• Expect to become familiar with iAS 10g architecture

37. Grid Control Summary

• The potential for whole-enterprise management is unsurpassed

• In a grid enterprise model, where servers proliferate quickly, management utilities are a business requirement

• RAC management without Grid Control is like the internet without a web browser

38. Management Maxim #10:

• When things becomes more manageable, and easier to maintain, the natural business reflex is to manage more things, and achieve a higher level of maintenance.