1. Core Technologies used for Virtual Machine Backup 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 Virtual Environment Backup Methods Virtual Machine Snapshots Disk-to-Disk Backups Volume Shadow Copy Service (VSS) vStorage APIs Data Deduplication Data Compression
12. Deleting Virtual Machine Snapshots Process has changed with different vSphere versions Helpersnapshot is created to hold disk writes Snapshot 1 grows to 23 GB Snapshot 2 grows to 18 GB 1 2 4 3 Snapshot 3 disk data file 10 GB Snapshot 2 disk data file 8 GB Snapshot 1 disk data file 5 GB Helper Snapshot disk data file 1 GB Original VM disk data file 60 GB
13. Deleting Virtual Machine Snapshots In later vSphere 4.1 & later 4.0 versions, each snapshot is merged directly back into the original disk in turn