Limitations on VM Snapshots

11.9.1. Limitations on VM Snapshots

•If a VM has some stored snapshots, you can't attach new volume to the VM or delete any existing volumes. If you change the volumes on the VM, it would become impossible to restore the VM snapshot which was created with the previous volume structure. If you want to attach a volume to such a VM, first delete its snapshots.

•VM snapshots which include both data volumes and memory can't be kept if you change the VM's service offering. Any existing VM snapshots of this type will be discarded.

•You can't make a VM snapshot at the same time as you are taking a volume snapshot.

•The "quiesce" option is not supported. This option is provided by the underlying VMware snapshot facility so that you can choose whether to quiesce the file system on a running virtual machine before taking the snapshot. In CloudPlatform, the quiesce option is always set to false; the file system is not quiesced before taking a snapshot of a running VM.

•You should use only CloudPlatform to create VM snapshots on VMware hosts managed by CloudPlatform. Any snapshots that you make directly on vSphere will not be tracked in CloudPlatform.

11.9.2. Configuring VM Snapshots

The cloud administrator can use global configuration variables to control the behavior of VM snapshots. To set these variables, go through the Global Settings area of the CloudPlatform UI.

Configuration Setting Name

Description

 

 

vmsnapshots.max

The maximum number of VM snapshots that

 

can be saved for any given virtual machine in

 

the cloud. The total possible number of VM

 

snapshots in the cloud is (number of VMs) *

 

vmsnapshots.max. If the number of snapshots

 

for any VM ever hits the maximum, the older

 

ones are removed by the snapshot expunge job.

 

 

vmsnapshot.create.wait

Number of seconds to wait for a snapshot job to

 

succeed before declaring failure and issuing an

 

error.

 

 

11.9.3. Using VM Snapshots

To create a VM snapshot using the CloudPlatform UI:

1.Log in to the CloudPlatform UI as a user or administrator.

2.Click Instances.

3.Click the name of the VM you want to snapshot.

4.

Click the Take VM Snapshot button.

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Citrix Systems 4.2 manual Limitations on VM Snapshots, Configuring VM Snapshots, Using VM Snapshots
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4.2 specifications

Citrix Systems, a leading provider of virtualization solutions and cloud computing technologies, released version 4.2 of its popular software, Citrix XenApp, which was previously known as Presentation Server. This version marked a significant evolution in providing users with remote access to applications and desktops, emphasizing simplicity, performance, and security.

One of the standout features of Citrix XenApp 4.2 is its improved application streaming capabilities. This technology allows applications to be delivered to users in real-time, reducing the need for extensive local installations and enhancing the user experience. With application streaming, administrators can efficiently manage applications on a central server while ensuring that users have immediate access to the necessary tools.

Another highlight of this version is the enhanced security measures put in place to protect sensitive data. Citrix XenApp 4.2 includes support for SSL encryption, providing a secure communication channel for data transmitted between the server and clients. This is particularly crucial for businesses that need to comply with strict data protection regulations. Additionally, the integration of endpoint security features ensures that unauthorized access to applications is minimized.

Performance enhancements are also a critical focus in this release. Citrix optimized the delivery of applications over various network conditions, ensuring that users experience minimal latency regardless of their location. This was achieved through the incorporation of SmartAccess and SmartControl technologies, which allow administrators to set policies based on user roles, device types, and network conditions. This level of granularity enables organization-wide security without compromising on usability.

The user experience was further improved with a revamped interface, making it easier for end-users to access their applications and data. Simplified menus, clear navigation paths, and the ability to customize user settings contributed to a more efficient workflow, allowing users to focus on their tasks rather than struggling with the software.

Finally, Citrix XenApp 4.2 was designed to be highly scalable. Organizations of all sizes could deploy this solution to deliver applications efficiently, adapting to their specific needs as their user base grows or changes. This flexibility is crucial for businesses looking to future-proof their IT investments while maintaining optimal performance.

In summary, Citrix XenApp 4.2 stands out with its enhanced application streaming, robust security features, improved performance under varying conditions, user-friendly interface, and scalability, making it an ideal choice for organizations seeking to leverage virtualization for remote access to applications and desktops.
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