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Table 2 Application Aware Snapshot Manager Issues and solutions (continued)
Issue
Solution
Failed to create application managed
1. Snapshots of all virtual machine volumes on the VMware
snapshot.
volume are created.
or
2. The application-managed snapshot is created.
3. The intermediate virtual machine snapshots (in step 1)
Failed to create snapshot for one or more
are deleted.
VMs.
If a virtual machine is busy when the virtual machine
snapshots are being created, the VMware API may time
out. The application-managed snapshot is still created, but
the intermediate virtual machine snapshots are not deleted.
The virtual machine snapshot manager will indicate that
the virtual machine snapshots were created, but will not
display an indication that they were deleted. To resolve
this issue, you must manually delete the intermediate virtual
machine snapshots.
If you have a failover cluster configuration using Windows This message can be ignored. The snapshot was take
Server 2012 servers and an application-managed snapshot successfully on the cluster server where the volume resides.
is taken on a volume, the following error message may
display in the Windows Application log on the cluster
server that does not own the volume:
Volume Shadow Copy Service error:
Unexpected error querying for the
IVssWriterCallback interface. hr =
0x80070005, Access is denied.
Application-managed snapshots do not work on SMB file
With Windows Server 2012, SQL Server is not quiesced
shares presented by a Windows Failover Cluster.
when an application-managed snapshot is taken on an
SMB file share that is presented by a Windows Failover
Cluster. The snapshot appears as if it is a managed
snapshot, but because SQL Server was not quiesced, it is
not a true managed snapshot.
It is possible for scheduled application-managed snapshots To resolve this issue, ensure that scheduled snapshots are
to fail if the application server is overloaded and unable
set to times where there is less activity on the application
to quiesce the application.
server.
RDM volumes and application-managed snapshot support. Creating application-managed snapshots of volumes that
are attached to VMware virtual machines (VM) as a Raw
Device Mapping (RDM) in virtual compatibility mode do
not result in snapshots on HP StoreVirtual Storage. When
using HP StoreVirtual Application Aware Snapshot
Manager to create a snapshot of a VMFS data store that
contains VMs using RDM disk resources, VMware takes a
snapshot of the RDMs and maintains changes to these
RDMs in the same VMFS data store. You can locate files
representing the snapshot of a RDM by browsing to the
VM’s location on VMFS data store. RDMs in physical
compatibility mode are not supported with HP StoreVirtual.
Creating application-managed snapshots for VMware
To resolve this issue, you can disable memory snapshots
virtual machines may cause significant delays in the
by adding a key to the Registry Editor:
snapshot process.
1. Open the Registry Editor and go to the path
HKLM\Software\HP\P4000\Client
Settings\1.0. If this path does not exist, you can
create it.
2. Create a string value called VMMemorySnapshot and
set it to false (VMMemorySnapshot=false).
NOTE:
This solution only applies if you are running
version 10.0 or 10.5. In version 11.0, there is a Snapshot
the virtual machine's memory option on the VMware
Snapshot Options window. To disable memory snapshots,
ensure that this option is not selected. See “Configuring
VMware snapshot options” (page 13) for more information.
Troubleshooting the Application Aware Snapshot Manager
15
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