Hpp-enterprises P4000 SAN Manual do Utilizador Página 47
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Figure 40. Backing up the host configuration
The resulting backup file contains the host configuration and may be extremely large.
The host may be restored using the following command.
xe host-restore host=<host> file-name=<restorefile>
Original XenServer installation media may also be used for restoration purposes.
Backing up metadata
SRs contain the virtual disks used by VMs either to boot their operating systems or store data. An SR is
physically connected to the hosts by physical block device (PBD) descriptors; virtual disks stored on
these SRs are connected to VMs by virtual block device (VBD) descriptors.
These descriptors can be thought of as SR-level VM metadata that provide the mechanism for
associating physical storage to the XenServer host and for connecting VMs to virtual disks stored on
the SR. Following a disaster, the physical SRs may be available; however, you need to recreate the
XenServer hosts. In this scenario, you would have to recreate the VM metadata unless this information
has previously been backed up.
You can back up VM metadata using the xsconsole command, as shown in Figure 41. Select the
desired SR.
Note
The metadata backup must be run on the master host in the resource pool,
if so configured.
- Table of contents 1
- Executive summary 3
- Business case 3
- High availability 4
- Scalability 4
- Virtualization 4
- XenServer storage model 5
- SAN connectivity 6
- Benefits of shared storage 7
- Storage node 7
- Configuring an iSCSI volume 9
- Configuring a XenServer Host 13
- Synchronizing time 14
- Figure 11 20
- Creating a VM on the new SR 28
- Summary 30
- Pooling XenServer hosts 35
- Disaster recoverability 45
- Backing up configurations 46
- Backing up metadata 47
- SAN based Snapshots 48
- SAN based Snapshot Rollback 49
- 43. Snapshot rollback 50
- Virtual Machines (VMs) 51
- Uniqueness of VMs 53
- Figure 47. VM clones 54
- Figure 49.New name 58
- Figure 54. Five volumes 61
- For more information 63
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