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Ensuring Backup Integrity in Virtualized Environments: Strategies and Best Practices

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Discover why backup integrity is crucial for IT organizations, particularly in virtualized environments. This session covers traditional backup verification methods and how virtualization simplifies the process. Learn about the significance of quiescing for consistency, the role of VMware Tools, and the essential distinction between successful backups and recoverability. We will explore verification challenges, different restore levels, and automation strategies to enhance backup integrity. Join us to ensure your backups are not just good but also reliably restorable.

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Ensuring Backup Integrity in Virtualized Environments: Strategies and Best Practices

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Presentation Transcript

  1. VMware Backup Integrity Eric Siebert vExpert, Author, Blogger Blog: http://vsphere-land.com http://searchvmware.com Twitter: @ericsiebert

  2. About the speaker • 25 year IT industry veteran. vSphere Land blog: http://vmware-land.com/ Author of popular books Contributor to industry publications vExpert nomination

  3. Agenda • Why backup integrity is critical • Traditional backup verification methods • How virtualization makes verification easier • Quiescing is critical to consistency • VMware Tools is important

  4. Why backup integrity is critical? • Good backups are important, good restores is more important • Backups worthless without proper restore capabilities • No errors reported doesn’t imply recoverability • Test and verify backups are working and recoverable Good backup APP Backup Restore Good Restore?

  5. The challenge of verifying backups • Reporting a successful backup is not a complete verification • File, application, database and server restores needed • Proper verification can be time-consuming • Restoring files is easy, applications or whole VM is complicated Need to ensure that VM backups are usable Good backup Non-production environment APP APP

  6. Traditional backup verification methods • Verification can’t impact production VMs • Requires un-used hardware to test restore • Bare-metal restores for verification is impractical • Difficult with many server models and generations Ensuring recoverability with legacy tools unfeasible Non-production environment Same App Backup Same Drivers Restore Same OS

  7. Data Restore Levels 3 Different levels to backup and restore Image level File level Application item level Backup SQL record Restore

  8. How virtualization makes verification easier • VMseasily restored to host and powered on • Network isolation prevents impacting production systems • Multiple VMs restored to tests applications • No extra hardware required The process is easier with virtualization Backup Restore

  9. Consistency is the key to good backups • OS, applications and data need to be in proper state • Critical for transactional applications: AD, SQL and Exchange Transaction-based applications Exchange SQL Active Directory More • Server must be prepared before snapshot • Pending transactions must completed • Missing data can cause corruption Backup Restore

  10. Quiescing is critical to consistency • Quiescing pauses VM while outstanding operations complete • Once quiesce is complete, VM snapshot can be taken Windows uses VSS Linux uses VMare Tools • Not all applications support quiescing

  11. Backup states A VM can be in several states when snapshot is taken • Equivalent to hard power off • OS is quiesced File system consistent • OS and applications are quiesced, best state

  12. VMware Tools • Contains drivers and applications that help optimize the guest OS to run on a VMware host Guest daemon Host/guest communication Toolbox/tray Configure VMware Tool settings VMware Tools VMmemtcl Memory balloon driver VMxnet VMware network drivers VMsync Sync driver for freezing and thawing

  13. VMware Tools • VMware Tools interacts with VSS • VMware Tools may not immediately support newest OSes • Backups can provide OS agents to quiesce VMs • In Linux VMs, the VMsync driver can provide VSS-like features Backup Server starts backup job Backup Server contacts VMware Tools to quiesce VM Microsoft VSS quiesce’s VM Backup Server creates VM Snapshot Using API Backup Server begins image- Level backup Backup Server deletes VM snapshot when finished 1 2 3 4 5 6

  14. What we covered: • Verify recoverability of backups to avoid any surprises • Regular verification of recoverability is required • Leverage virtualization for verification • Automation is essential • Verifying recoverability is critical

  15. Enjoy and share this material • Feel free to promote this material • Recommend your peers to pass certification • Blog, Tweet and share this material and your experience on Facebook • You’re an Expert? We will be happy to have you as Backup Academy • contributor. Apply here. Web: http://www.backupacademy.com E-mail: feedback@backupacademy.com Twitter: BckpAcademy Facebook: backup.academy

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