1 / 15

Effective Backup and Recovery Strategies

Learn about backup, recovery risks, strategies, and music compression in this session. Understand tape backup, compression methods, and analysis teams. Discover how to protect data against various failures and disasters. Get insights on safeguarding critical information.

shawl
Download Presentation

Effective Backup and Recovery Strategies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Backup and Recovery Session 6 INST 346

  2. Agenda • Introducing Mike • Finishing audio compression • Backups • Analysis Teams

  3. Sampler Basic Audio Coding • Sample at twice the highest frequency • 8 bits or 16 bits per sample • Speech (0-4 kHz) requires 8 kB/s • Standard telephone channel (1-byte samples) • Music (0-22 kHz) requires 172 kB/s • Standard for CD-quality audio (2-byte samples)

  4. Risks • Accidental alteration or deletion • Malicious alteration or deletion • Storage device failure • System failure • Catastrophe

  5. Strategies • Change log • Staged deletion • Redundant storage • Redundant systems • Redundant sites

  6. Tape Backup • LTO-8 cartridges • 12 TB uncompressed (~30TB compressed) • 9.25 hour full-tape write time • Optionally encrypted • Mountable as a “disk-like” file system for recovery

  7. Music Compression • Opportunity: • The human ear cannot hear all frequencies at once • Approach: • Don’t represent “masked” frequencies • Standard: MPEG-1 Layer 3 (.mp3)

  8. Tape Handling

  9. Backup Strategies

  10. Some Considerations • Tape reliability • Tape reuse • Disclosure risk • Decorrelated risk

  11. Analysis Teams: Goal • Relate what we are learning to recent events • Gain some team experience • Gain some research experience

  12. Analysis Team: Process • Five people per team (maybe 4) • One “seed reading” • Meet briefly with me one week prior • Divvy up the research task • Do additional research to fill out the picture • Centralize creation of presentation materials • Choose one to three speakers • Practice a 10 minute in-class talk • Maximum of 5 points • Usually all members will get the same score

  13. Audience: Process • No preparation required • Make notes on key reactions • Online or paper • Upload your notes to ELMS discussion forum by the end of the same day • 0.5 points each for substantive comments on six of 10 presentations (other than your own) • Team and everyone who has commented will see your comments

  14. Analysis Team 1 Analysis Team members are listed in ELMS

  15. Before You Go! • On a sheet of paper (no names), answer the following question: What was the muddiest point in today’s class?

More Related