Monthly Archives: October 2007

Types of service configurations in RAC

a. Active/Spare – Failover capability for all services in A + B redundancy model. Where A is number of instances, B is a spare instance b. Active/Symmetric – All nodes provide same set of services. Services active on all nodes … Continue reading

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ASM scalability

Few numbers, what ASM can handle a. Maximum 63 ASM diskgroupb. Maximum 10000 disksc. 4 Petabyte Maximum storage for each ASM disk d. 40 Exabyte maximum storage for each storage systeme. 1 Million files per disk groupf. 2.4 TB Maximum … Continue reading

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About Automatic Storage Management

1. ASM COARSE stripping -> Stripping is done in 1MB chunks. Data files, arhive log, datafile backups use COARSE stripping. 2. ASM fine grained stripping -> Stripping is done in 128KB chunks. Control files, flashback logs, online logs use fine … Continue reading

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Oracle RAC List of OCR client applications

1. OUI (Oracle Universal Installer)2. SRVCTL3. EM (Enterprise Manager)4. DBCA (Database Configuration Assistant)5. DBUA (Database Upgrade Assitant)6. VIPCA (Virutal IP configuration Assitant)7. NETCA (Network configuration Assistant)

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Oracle RAC Resources managed by the CRS

1. GSD (Global Service Demon)2. ONS (Oracle Notification Service)3. VIP (Virtual Internet Protocol)4. Listeners5. Database6. Instances7. Services What are NodeApps? Everything except Database & Instances 1. GSD (Global Service Demon)2. ONS (Oracle Notification Service)3. VIP (Virtual Internet Protocol)4. Listeners5. Services

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