Maintenance Mode for Primary Storage

14.2.5. Maintenance Mode for Primary Storage

Primary storage may be placed into maintenance mode. This is useful, for example, to replace faulty RAM in a storage device. Maintenance mode for a storage device will first stop any new guests from being provisioned on the storage device. Then it will stop all guests that have any volume on that storage device. When all such guests are stopped the storage device is in maintenance mode and may be shut down. When the storage device is online again you may cancel maintenance mode for the device. The CloudPlatform will bring the device back online and attempt to start all guests that were running at the time of the entry into maintenance mode.

14.3. Secondary Storage

This section gives concepts and technical details about CloudPlatform secondary storage. In addition to the material in this section, please see:

•For a basic overview, see Section 3.7, “About Secondary Storage”.

•For information about how to install and configure secondary storage through the CloudPlatform UI, see Section 8.8, “Adding Secondary Storage”.

14.3.1. Best Practices for Secondary Storage

•Each Zone can have one or more secondary storage servers. Multiple secondary storage servers provide increased scalability to the system.

•Secondary storage has a high read:write ratio and is expected to consist of larger drives with lower IOPS than primary storage.

•Ensure that nothing is stored on the server. Adding the server to CloudPlatform will destroy any existing data.

14.3.2. Changing the Secondary Storage IP Address

You can change the secondary storage IP address after it has been provisioned. After changing the IP address on the host, log in to your management server and execute the following commands. Replace HOSTID below with your own value, and change the URL to use the appropriate IP address and path for your server:

#mysql -p mysql> use cloud;

mysql> select id from host where type = 'SecondaryStorage';

mysql> update host_details set value = 'nfs://192.168.160.20/export/mike-ss1' where host_id = HOSTID and name = 'orig.url';

mysql> update host set name = 'nfs://192.168.160.20/export/mike-ss1' where type

='SecondaryStorage' and id = #;

mysql>

update

host

set

url = 'nfs://192.168.160.20/export/mike-ss1' where type

= 'SecondaryStorage'

and

id

=

#;

mysql>

update

host

set

guid =

'nfs://192.168.160.20/export/mike-ss1' where type

= 'SecondaryStorage'

and

id

=

#;

Note

When copying and pasting a command, be sure the command has pasted as a single line before executing. Some document viewers may introduce unwanted line breaks in copied text.

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Citrix Systems 4.2 manual Maintenance Mode for Primary Storage, Best Practices for Secondary Storage
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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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