tailieunhanh - 1 Oracle Data Guard: Overview

After completing this lesson, you should be able to do the following: Describe the factors that affect planned and unplanned downtime Describe the basic components of Oracle Data Guard Explain the differences between physical and logical standby databases Explain the benefits of creating a Data Guard environment Explain the use of Data Guard in high-availability architectures | Oracle Data Guard: Overview Oracle Database 10g: Data Guard Administration 1 - Objectives After completing this lesson, you should be able to do the following: Describe the factors that affect planned and unplanned downtime Describe the basic components of Oracle Data Guard Explain the differences between physical and logical standby databases Explain the benefits of creating a Data Guard environment Explain the use of Data Guard in high-availability architectures Oracle Database 10g: Data Guard Administration 1 - Causes of Data Loss Source: Disaster Recovery Journal Natural disasters 3% Software corruption 4% Computer viruses 7% Human errors 36% Hardware & system errors 49% Causes of Data Loss According to a survey published in the Disaster Recovery Journal (DRJ), the leading causes of data loss were not natural disasters but hardware failures and human errors. The goal of Oracle Data Guard is to provide an effective safeguard against data loss. Data Guard provides . | Oracle Data Guard: Overview Oracle Database 10g: Data Guard Administration 1 - Objectives After completing this lesson, you should be able to do the following: Describe the factors that affect planned and unplanned downtime Describe the basic components of Oracle Data Guard Explain the differences between physical and logical standby databases Explain the benefits of creating a Data Guard environment Explain the use of Data Guard in high-availability architectures Oracle Database 10g: Data Guard Administration 1 - Causes of Data Loss Source: Disaster Recovery Journal Natural disasters 3% Software corruption 4% Computer viruses 7% Human errors 36% Hardware & system errors 49% Causes of Data Loss According to a survey published in the Disaster Recovery Journal (DRJ), the leading causes of data loss were not natural disasters but hardware failures and human errors. The goal of Oracle Data Guard is to provide an effective safeguard against data loss. Data Guard provides enterprises with complete data protection, data recovery, and data availability, ensuring round-the-clock business continuity. Oracle Database 10g: Data Guard Administration 1 - Understanding the Causes of Downtime Planned downtime Unplanned downtime System changes Data changes Data failures Computer failures Corruption Human error Site failure Storage failure Understanding the Causes of Downtime Every system faces both unplanned and planned downtime. It is important to consider causes of both unplanned and planned downtime when designing a fault-tolerant, resilient infrastructure. Unplanned downtime consists of the following: Computer failures: Downtime occurs when there is a power outage or a system crash. Data failures: Data failure is the loss, damage, or corruption of critical enterprise data. Causes of data failure include: Storage failure: Disk crash or space limitations Human error: Downtime occurs when someone inadvertently drops a table or the system administrator makes an error. .