Recovery Mechnaism Flashcards
(11 cards)
What are recovery mechanisms in computing and networking?
Recovery mechanisms are strategies and tools used to restore system functionality and data after a failure, error, or disaster such as hardware crash, data corruption, or cyberattack.
Why are recovery mechanisms important?
They ensure business continuity, minimize downtime, and help recover lost or corrupted data quickly and accurately after unexpected events.
What is the difference between backup and recovery?
Backup is the process of creating data copies; recovery is the process of restoring data and system operations from those backups after a failure.
What is system recovery?
System recovery refers to restoring an entire system, including its operating system, applications, and configurations, often using system images or recovery partitions.
What is data recovery?
Data recovery is the process of retrieving lost, corrupted, or inaccessible data from storage devices like hard drives, SSDs, or backup files.
What is transaction recovery in databases?
Transaction recovery restores a database to a consistent state after a failure by rolling back incomplete transactions or replaying committed ones using logs.
What is a recovery point objective (RPO)?
RPO defines the maximum acceptable amount of data loss measured in time. It determines how often data backups should be taken.
What is a recovery time objective (RTO)?
RTO is the maximum acceptable downtime for a system after a failure. It defines how quickly services must be restored to avoid major disruptions.
What are some common recovery tools or methods?
Common tools include system restore, backup software, disk imaging tools, RAID configurations, and cloud-based disaster recovery services.
What is failover in recovery mechanisms?
Failover is an automated process that switches to a standby system or backup server when the main one fails, ensuring continuous availability.
How does journaling help with recovery?
Journaling is a method where changes are first recorded in a journal or log. If a failure occurs, the journal can be used to recover and complete pending changes safely.
