Wednesday, May 29, 2024

Optimize cost: Hibernate on Activity Manager

Organizations face ongoing challenges around cloud resource management and cost control, especially when running persistent desktops on a large scale. Running a VDI infrastructure can be resource-intensive, especially on cloud platforms where costs can quickly accumulate due to constant server use and energy consumption. Citrix Activity Manager’s latest enhancement, the Hibernate and Resume capability, presents an option for organizations seeking to balance cost savings with user productivity.

The Hibernate and Resume feature allows users to optimize resource utilization by hibernating their Citrix delivered VMs when not in use and seamlessly resume them when needed. This not only saves costs and energy but also enhances user experience with session state retention.

In Microsoft Azure environments, administrators can create machine catalogs that fully support hibernation. This feature allows virtual machines to be suspended and seamlessly resume their previous state when users reconnect, optimizing resource utilization and enhancing user experience.

The hibernation capability is specifically beneficial for persistent single-session OS machine catalogs. When initiating hibernation, Azure communicates with the guest operating system, triggering a suspend-to-disk action. During this process, the memory (RAM) contents of the virtual machine are preserved on the OS disk, while the virtual machine itself is deallocated. Upon startup, the virtual machine’s RAM contents are restored from the OS disk, ensuring that applications and processes resume seamlessly from their last state.

One of the advantages of hibernation is its impact on cost optimization. While a virtual machine remains in a hibernated or deallocated state, There are no usage changes. Instead, charges only apply to the storage (including OS disks and data disks) and networking resources (such as IPs) associated with the virtual machine. This cost-saving mechanism makes hibernating virtual machines an attractive option for many scenarios, including:

  • Users start their virtual machines, which then show up in the Activity Manager. This interface provides an overview of active sessions and available options. If users are using the virtual machine or have disconnected intentionally, their session stays visible and active in the Activity Manager.
  • For virtual machines equipped with hibernation capability, users are presented with an additional option to hibernate the virtual machine. Users can access the hibernate option within the 3 dots menu. 
  • Upon initiating the hibernation action, users are informed of the process through a status indicator, such as “Hibernating…”. Once the hibernation process is complete, the session moves to a dedicated section within the Activity Manager interface. 
  • Users can resume their hibernated sessions by simply clicking on the session name or action. This initiates the process of resuming their work, seamlessly restoring the session to its previous state.

Admin Control:

  • Administrators can enable or disable the Activity Manager feature for user groups via Workspace configuration settings.
  • Administrators need to follow specific guidelines to enable hibernation capability in Azure and Citrix DaaS.

Citrix Activity Manager’s hibernate and resume feature offers users and organizations a powerful tool to optimize resource utilization and enhance user experience. With this feature, businesses can achieve a balance between cost efficiency, user productivity, and environmental responsibility, paving the way for a more sustainable future in the digital workspace.

from Citrix Blogs

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