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Why Virtual Machine Backups Are Different David Davis Twitter: @davidmdavis Blog: www.VMwareVideos.com

Why Virtual Machine Backups Are Different David Davis Twitter: @davidmdavis Blog: www.VMwareVideos.com. About the speaker. Previous VMware Customer, IT Manager, Server & Network Admin with 18 years in IT. Contributor to industry publications. Agenda. Hardware Independence

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Why Virtual Machine Backups Are Different David Davis Twitter: @davidmdavis Blog: www.VMwareVideos.com

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  1. Why Virtual Machine Backups Are DifferentDavid DavisTwitter: @davidmdavisBlog: www.VMwareVideos.com

  2. About the speaker • Previous VMware Customer, IT Manager, Server & Network Admin with 18 years in IT Contributor to industry publications

  3. Agenda • Hardware Independence • Image Level vs. File Level Backups • Change Block Tracking (CBT) • New Possibilities With VM Backups – Fast Restore, Replication, Virtual Lab, and more • Traditional Backup Doesn’t Understand Virtualization • What is the Right Tool for the Job?

  4. Hardware Independence Traditional architecture Totally different approach required for virtualization

  5. Hardware Independence Virtualization architecture

  6. Hardware Independence • Abstracts OS from being tied to the hardware • Guest OS now uses virtual hardware that works no matter the underlying server hardware • Allows you to move VMs from server to server (within processor family) • Hardware independence makes the benefits of virtualization possible Completely changes how you should look at backup

  7. Image Level vs. File Level Backups • With virtualization, you can backup the entire “image” of the server • No agent is required in the guest OS • No load is put on the guest OS • No end users are affected when the backup occurs • Backing up the image of the server is much faster and less disruptive than backing up the files in the guest OS • Image level restores are much faster Backup Restore Restore options and speed are critical

  8. Change Block Tracking (CBT) • With VMware ESX/ESXi 4.0 or later and virtual machine HW version 7 or later, change block tracking is possible • Virtual machine disk blocks that are changed are tracked outside of the guest OS • CBT allows virtualization backup software to backup only the changed blocks (software that takes advantage of this feature) Allows backups to only process changed blocks

  9. New Possibilities with VM Backups • VM portability (HW independence) • vMotion / svMotion / DRS / VMHA • Fast backup (change block tracking) • Fast restore (mount for backup repository & image level restore) • Simplified disaster recovery • Replication of only changed blocks to DR site • Virtual Lab using backups of production VMs for test & development All made possible with use of virtualization

  10. Traditional Backup Doesn’tUnderstand Virtualization • You need backups of the VMDK (virtual machine disk) as well as the VMX (virtual machine configuration)

  11. Traditional Backup Doesn’tUnderstand Virtualization • The VMX contains the VM’s virtual hardware and configuration

  12. Traditional Backup Doesn’tUnderstand Virtualization • Virtual machines move around thanks to vMotion and Distributed Resource Scheduler (DRS)

  13. What is the Right Tool for the Job?

  14. What We Covered • Hardware Independence • Image Level vs. File Level Backups • Change Block Tracking (CBT) • New Possibilities With VM Backups – Fast Restore, Replication, Virtual Lab, and more • Traditional Backup Doesn’t Understand Virtualization • What is the Right Tool for the Job?

  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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