Resetting the Virtual Machine Root Volume on Reboot

•When scaling memory or CPU for a Linux VM on VMware, you might need to run scripts in addition

to the other steps mentioned above. For more information, see Hot adding memory in Linux (1012764)2 in the VMware Knowledge Base.

•(VMware) If resources are not available on the current host, scaling up will fail on VMware because of a known issue where CloudPlatform and vCenter calculate the available capacity differently. For more information, see https://issues.apache.org/jira/browse/CLOUDSTACK-1809.

•On VMs running Linux 64-bit and Windows 7 32-bit operating systems, if the VM is initially assigned a RAM of less than 3 GB, it can be dynamically scaled up to 3 GB, but not more. This is due to a known issue with these operating systems, which will freeze if an attempt is made to dynamically scale from less than 3 GB to more than 3 GB.

11.12.Resetting the Virtual Machine Root Volume on Reboot

For secure environments, and to ensure that VM state is not persisted across reboots, you can reset the root disk. For more information, see Section 14.4.7, “Reset VM to New Root Disk on Reboot”.

11.13. Moving VMs Between Hosts (Manual Live Migration)

The CloudPlatform administrator can move a running VM from one host to another without interrupting service to users or going into maintenance mode. This is called manual live migration, and can be done under the following conditions:

•The root administrator is logged in. Domain admins and users can not perform manual live migration of VMs.

•The VM is running. Stopped VMs can not be live migrated.

•The destination host must have enough available capacity. If not, the VM will remain in the "migrating" state until memory becomes available.

•(KVM) The VM must not be using local disk storage. (On XenServer and VMware, VM live migration with local disk is enabled by CloudPlatform support for XenMotion and vMotion.)

•(KVM) The destination host must be in the same cluster as the original host. (On XenServer and VMware, VM live migration from one cluster to another is enabled by CloudPlatform support for XenMotion and vMotion.)

•(OVM) If the VM is running on the OVM hypervisor, it must not have an ISO attached. Live migration of a VM with attached ISO is not supported in OVM.

To manually live migrate a virtual machine:

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

2.In the left navigation, click Instances.

3.Choose the VM that you want to migrate.

4.

Click the Migrate Instance button.

5. From the list of suitable hosts, choose the one to which you want to move the VM.

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Citrix Systems 4.2 Resetting the Virtual Machine Root Volume on Reboot, Moving VMs Between Hosts Manual Live Migration
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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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