HP Data Protector A.06.11 Support for Vmware vstorage technical ...
HP Data Protector A.06.11 Support for Vmware vstorage technical ...
HP Data Protector A.06.11 Support for Vmware vstorage technical ...
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Mixed: <strong>Support</strong>s full, differential, and incremental backups in all backup chain combinations.<br />
For example:<br />
Full, incremental, incremental, differential, incremental, differential,...<br />
The snapshot made at the beginning of a backup session is used to create a consistent state.<br />
After the backup completes, up to two DP snapshots remain on the snapshot tree. One is<br />
needed to track changes made since the last full backup and the other to track changes made<br />
since the last backup (incremental or differential). For details, see Snapshot mode: mixed.<br />
Backup chain<br />
When per<strong>for</strong>ming snapshot operations on a backed up virtual machine, you must be careful not to<br />
break your backup chains. A backup chain gets broken if you do any of the following operations:<br />
Delete a snapshot<br />
Revert to a snapshot<br />
Create a non-<strong>Data</strong> <strong>Protector</strong> snapshot<br />
Change snapshot handling mode<br />
Add a new virtual machine disk or rename an existing one<br />
Restore the virtual machine<br />
After making any such changes, you must run a full backup again to start a new backup chain.<br />
Otherwise, subsequent incremental and differential sessions fail.<br />
On supported Windows guest operating systems, it is possible to use the VSS framework to<br />
freeze, or quiesce, the states of the applications running within a VM be<strong>for</strong>e a snapshot is<br />
created. If quiescence is selected <strong>for</strong> a Windows guest operating system, the snapshot process<br />
quiesces all system writers and registered application writers be<strong>for</strong>e taking the snapshot of the<br />
virtual machine.<br />
During a backup with quiescence enabled, a .zip file is created that contains all the BCD and<br />
writer manifests located in the datastore(s) concerned. <strong>Data</strong> <strong>Protector</strong> backs up this file. During a<br />
restore, the file is restored to the same location and then post-restore VSS steps like roll-<strong>for</strong>ward<br />
can be per<strong>for</strong>med manually.<br />
Backup summary<br />
A summary of the backup option/backup type combinations available with the vStorage Image<br />
method is shown in the table below.<br />
Table 1 vStorage backup method overview<br />
vStorage<br />
method options<br />
selected<br />
None (Standard<br />
operation)<br />
How is backup<br />
consistency achieved?<br />
<strong>Data</strong> <strong>Protector</strong><br />
requests a virtual<br />
machine snapshot,<br />
providing crash<br />
consistency.<br />
Quiescence VSS quiesces system<br />
and application<br />
writers be<strong>for</strong>e creating<br />
a snapshot, providing<br />
data/application<br />
consistency in the VM<br />
<strong>Support</strong>ed guest<br />
operating system<br />
<strong>Support</strong>ed backup types<br />
Full Diff Incr<br />
Windows/Linux ✓ ✓ ✓<br />
Windows only ✓ ✓ ✓<br />
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