Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Disaster Recovery & Data Backup Strategies


Published on

Published in: Technology
  • Hello! I do no use writing service very often, only when I really have problems. But this one, I like best of all. The team of writers operates very quickly. It's called ⇒ ⇐ Hope this helps!
    Are you sure you want to  Yes  No
    Your message goes here
  • Überprüfen Sie die Quelle ⇒ ⇐ . Diese Seite hat mir geholfen, eine Diplomarbeit zu schreiben.
    Are you sure you want to  Yes  No
    Your message goes here
  • Sie können Hilfe bekommen bei ⇒ ⇐. Erfolg und Grüße!
    Are you sure you want to  Yes  No
    Your message goes here
  • Überprüfen Sie die Quelle ⇒ ⇐ . Diese Seite hat mir geholfen, eine Diplomarbeit zu schreiben.
    Are you sure you want to  Yes  No
    Your message goes here
  • Ryan Shed Plans 12,000 Shed Plans and Designs For Easy Shed Building! ☞☞☞
    Are you sure you want to  Yes  No
    Your message goes here

Disaster Recovery & Data Backup Strategies

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