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Disaster Recovery & Data Backup Strategies

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  • Myriad Pro Regular 48pt Presented By:  Myriad Pro Semibold 30pt (all caps) Presenter: Myriad Pro Semibold 48pt Company: Myriad Pro Regular 48pt Date: Myriad Pro Regular 24pt
  • Transcript

    • 1. Break Out Session 3 Disaster Recovery and Data Backup PRESENTED BY: Kris Bushover, Spiceworks Inc Eric Osterholm, OuterNet
    • 2. Session Overview
      • Data Backup – Why and How
      • Identifying Critical Data Systems
      • Planning for backup
      • Implementing, Monitoring, and Testing
    • 3. Backup – Why do it?
      • Increasingly, even the smallest businesses have become reliant upon the data they generate
        • Critical data drives sales, tracks students, monitors inventories, and assists in the delivery of healthcare
    • 4. Backup – Why do it?
      • Bottom line, in business today, you are your data
      • Lose data, lose business
      • Lost productivity, customer relationships, etc
    • 5. Backup – Planning
      • I already have RAID protection, why should I back the data up?
      • I already copy the data I need to disks/other systems/a CD in my desk drawer.....
    • 6. Backup – Planning Can you recover it when you need it?
    • 7. Backup – Planning Solutions fall into 3 tiers: User Snapshots, folder redirection Server Tape, Disk to disk, HSM, Virtualization Site Replication, Synthetic fulls
    • 8. Backup – Planning
      • Start backup planning by identifying the critical data systems
      • What relies on that data?
      • Get together with the business process owners and identify the data that they need to drive their business functions
    • 9. Backup – Planning
      • Determine “criticality” of data
        • Work with process owners
        • Begin determining RTO/RPO
          • RTO – recovery time objective: the amount of time that can pass between data system failure and restoration of functionality
          • RPO – recovery point objective: the reflected point in time of recovered data or the most recent version of the data that will be restored
    • 10. Backup – Planning
      • Based on this information, determine capacity requirements
        • How much data needs to be backed up?
        • How much will the data set grow?
        • What is the acceptable backup window?
          • System utilization
          • Peak and ebb periods
    • 11. Backup – Planning
      • Individual high-capacity systems may require dedicated backup resources; determine this now
      • Based on RTO/RPO, determine where offsite backup storage fits
    • 12. Developing the Backup Plan
      • Determine the repository type
        • Full
        • Full+Incremental
        • Full+Differential
        • Continous Data Protection (CDP)‏
        • Virtualization
        • Snapshots
        • Replication
    • 13. Developing the Backup Plan
      • Full Backup
        • Complete backup of the entire targeted data set
        • Restores are simple: restore using the single backup
        • Takes up the most space (of traditional backups)‏
    • 14. Developing the Backup Plan
      • Full+Incremental Backup
        • Full backup made, followed by backups of only the data that has changed since the last full or incremental backup
        • Restores are more complicated: requires all backups and all incrementals
        • Complex storage requirements
    • 15. Developing the Backup Plan
      • Full+Differential Backup
        • Make a full backup, followed by a backup that captures all changes made since the last full backup
        • Data may be (probably will be) duplicated throughout the backup sets
        • Recovery requires last full backup and last differential
    • 16. Developing the Backup Plan
      • Continuous Data Protection (CDP)‏
        • Backup system logs all changes to the system
        • Most often a block-level function
        • Dedicated hardware appliances and storage systems
        • Normally yields highest confidence in recovery, lowest RTO
    • 17. Developing the Backup Plan
      • Virtualization
        • Not directly a backup solution
        • Used in conjunction with snapshots or replication
        • Can provide fastest and most flexible recovery options
    • 18. Developing the Backup Plan
      • Snapshots
        • Keeps ‘point in time’ images of live system
        • Enables user accessible restore options
        • Based on base image + ‘differences’ = susceptible to corruption of all images
        • NetApp ‘.snapshot’ and Microsoft VSS
    • 19. Developing the Backup Plan
      • Replication
        • Copies file system changes as they are made
        • Bandwidth requirements play a big part:
          • Synchronous = delayed commit
          • Asynchronous = image latency
        • Used extensively for hosted offsite DR scenarios
    • 20. Developing the Backup Plan
      • Determine Media Type(s)‏
        • Tape
        • Disk-based backup
          • More on this in a moment
        • Optical
        • Offsite/Internet-based systems
        • Hybrids
    • 21. Developing the Backup Plan
      • Tape
        • Magnetic tape is the classic backup medium
        • Sequential access: very fast writing of new data, really slow access for reading data
        • Numerous formats
          • LTO, DLT, AIT, DAT, etc
    • 22. Developing the Backup Plan
      • Tape
        • Tape drives/robotic libraries can be extremely expensive, but also very high capacity
          • Provide a good cost/capacity ratio
        • Tape is portable
          • Can be stored offsite for DR purposes
    • 23. Developing the Backup Plan
      • Disk
        • Faster backups
          • Can eliminate streaming issues often seen when using tape to back up many small files
        • Shorter restore times
          • Seeking on disk is much faster than seeking on linear tape
    • 24. Developing the Backup Plan
      • Disk
        • Physically managing disks can be less complex than managing multiple tapes
        • Disk reliability can be higher
          • Mainly because it is not handled as much
        • However.....
    • 25. Developing the Backup Plan
      • Disk
        • Since tapes normally contain a single backup, it is often just a matter of locating the tape that contains the needed data
        • Disk,on the other hand, will contain many sets of backup data, so coherent catalogs are of utmost importance
    • 26. Developing the Backup Plan
      • Disk
        • Other strategies exist for disk
          • Virtual Tape Libraries
            • Emulate tape to eliminate some of the previously mentioned complexity
        • Snapshot storage
    • 27. Developing the Backup Plan
      • Optical
        • Good for archiving (WORM)‏
        • Not much else
      • Offsite/Internet-based
        • Data is shipped offsite over the internet to a hosting/storage provider
        • Replication
    • 28. Developing the Backup Plan
      • Determine Backup Windows
        • Normally, when systems are at lowest utilization (ie, middle of the night)‏
        • Backup windows must be monitored
          • More on this in a minute
    • 29. Developing the Backup Plan
      • RTO/RPO can affect the above decisions
        • Aggressive RTO may call for high-capacity, fast tape or disk systems
        • Less aggressive RTOs may call for single tape systems with simple media rotation schemes
        • RTOs approaching 0 may require complex CDP/backup/replication systems
    • 30. Implement the Backup Plan
      • Implement the plan
        • As soon as the backup plan is in place and implemented, begin monitoring
        • Monitor conditions such as:
          • Backup window violations (excessive run times)‏
          • Errors/missed files
          • Unplanned media consumption rates
          • Bandwidth consumption
          • Affect on system performance
    • 31. Implement the Backup Plan
      • Backup Window Violations
        • If backup windows are missed, decide whether to abort the backup or increase the window
        • Could be a capacity issue
          • Increase capacity of backup system
          • Change media type (tape to disk)‏
          • Change strategy (differential to incremental or CDP)‏
    • 32. Implement the Backup Plan
      • Backup Window Violations
        • Change to a Disk-to-Disk-to-Tape scheme
          • Data is backed up to disk (staged), and then from there backed up to tape
          • Can have benefits in network systems where latency is affecting backup run times
          • Other benefits include being able to compress the data on the disk prior to backing up to tape and possibly encrypting
    • 33. Implement the Backup Plan
      • Test Your Backups
        • Once again.... test your backups
        • Test for errors and completeness
        • If available, periodically restore to secondary/test systems
        • Address any and all errors thrown by backup systems immediately
        • Discard media that shows excessive errors
    • 34. Implement the Backup Plan
      • Maintain Contacts
        • Check in with business process owners to ensure that objectives have not changed
        • Brief stake-holders on quality control methods in place to ensure their data is safe and secure
    • 35. Implement the Backup Plan
      • Document
        • Document how all of the backup systems work
          • Backup strategies for various systems
          • Restore procedures
          • Where media is stored and how it is rotated
          • What to do in case of a missed backup window
          • Emergency contacts
            • Vendors, OEMs, backup specialists, etc
    • 36. Questions?