Also what did people write about the Back up question?
did anyone talk about disaster recovery strategy which needs to be in place and the different back up options and recovery procedures options?
Backup options available for large systems;
• Failover systems (used to provide continuous service for mission critical systems such as e-commerce. If the main system fails, they immediately switch to standby services to maintain continuity. They may involve standby hardware, such as a network or server, software data, depending on the cause of the problem)
• Replicated systems provide quick recovery of databases.
• Regular snapshots (frozen image of a file system at a given instant of time)
• Periodic backup to disk, involves making a backup copy to another hard disk
• Tape backup, allows backups to be a portable medium that can be stored away from the server
• Archiving is useful for backing up data that may not be needed immediately but must be retained.
Procedures for recovery of large scale systems;
• Step 1: Estimate situation – Evaluate the extent of the problem
• Step 2: Evaluate available resources – This includes both human and hardware resources, making sure the required expertise is available and assessing whether there is sufficient functioning hardware & disk space
• Step 3: Set up – Install good hard disks into functioning hardware
• Step 4: Recovery run – Install the data recovery software onto the host machine and run it
• Step 5: Evaluate the results – Undertake a manual review of the most important files
• Step 6: Clean up – Remove any corrupt files or files that were created for the purpose of testing recovery