rman commands

RMAN Commands:

This chapter describes, in alphabetical order, Recovery Manager commands and subclauses. For a summary of the RMAN commands and command-line options, refer to "Summary of RMAN Commands".

Summary of RMAN Commands

Table 2-1 provides a functional summary of RMAN commands that you can execute at the RMAN prompt, within a RUN command, or both. All commands from previous RMAN releases work with the current release.

For command line options for the RMAN client, refer to "cmdLine".

Table 2-1 Recovery Manager Commands

RAC INTERVIEW QUESTION and ANSWERS

RAC INTERVIEW QUESTION and ANSWERS:

What are Oracle Clusterware processes for 10g on Unix and Linux
Cluster Synchronization Services (ocssd) — Manages cluster node membership and runs as the oracle user; failure of this process results in cluster restart.
Cluster Ready Services (crsd) — The crs process manages cluster resources (which could be a database, an instance, a service, a Listener, a virtual IP (VIP) address, an application process, and so on) based on the resource's configuration information that is stored in the OCR. This includes start, stop, monitor and failover operations. This process runs as the root user

Event manager daemon (evmd) —A background process that publishes events that crs creates.
Process Monitor Daemon (OPROCD) —This process monitor the cluster and provide I/O fencing. OPROCD performs its check, stops running, and if the wake up is beyond the expected time, then OPROCD resets the processor and reboots the node. An OPROCD failure results in Oracle Clusterware restarting the node. OPROCD uses the hangcheck timer on Linux platforms.
RACG (racgmain, racgimon) —Extends clusterware to support Oracle-specific requirements and complex resources. Runs server callout scripts when FAN events occur.

RAC INTERVIEW QUESTIONS

What is RAC?

RAC stands for Real Application cluster. It is a clustering solution from Oracle
Corporation that ensures high availability of databases by providing instance failover,
media failover features.
Mention the Oracle RAC software components:-
Oracle RAC is composed of two or more database instances. They are composed of
Memory structures and background processes same as the single instance database.Oracle
RAC instances use two processes GES(Global Enqueue Service), GCS(Global Cache
Service) that enable cache fusion.Oracle RAC instances are composed of following
background processes:
ACMS—Atomic Controlfile to Memory Service (ACMS)
GTX0-j—Global Transaction Process
LMON—Global Enqueue Service Monitor
LMD—Global Enqueue Service Daemon
LMS—Global Cache Service Process
LCK0—Instance Enqueue Process
RMSn—Oracle RAC Managemen

RSMN—Remote Slave Monitor
What is GRD?