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Citrix XML service

Explaining and Changing the Citrix XML Service Port Summary This article explains the XML Service. The Citrix XML Service was introduced with MetaFrame 1.8 Service Pack 2 and a Feature Release 1 license needed to be installed. MetaFrame XP and later incorporates the Citrix XML Service as a standard feature. When MetaFrame 1.8 Service Pack 2 or later is installed and the server rebooted, the Citrix XML Service binaries are placed on the system whether the Citrix XML Service was or was not installed.

Configuring Offline Access

Administrators can configure applications that are published to stream to desktops for offline access. This feature allows users to disconnect from the company network and continue to run their applications in offline mode for a specified length of time. No additional configuration is needed while profiling the application to create application profiles or targets that can be accessed offline. After you configure the offline application policy settings and configure a streamed application for offline access, the next time the user device connects to XenApp, the offline plug-in downloads the application and caches it on the user device.

Content Redirection

In Citrix Metaframe XP Feature Release 2 Citrix introduced content redirection. Content redirection can be divided in two parts. Server to Client content redirection; this makes it possible to start URLs locally on the client PC. Embedded URLs are intercepted on the server running Presentation Server and sent to the client. The user’s locally installed browser is used to display the website. Client to Server content redirection; when a user double-clicks a file the corresponding application is started on the Citrix server.

CPU Utilization Management

The CPU utilization management feature can improve the ability of a farm to manage resources and normalize CPU peaks when the farm’s performance becomes limited by CPU-intensive operations. In Windows, CPU utilization management entitles each user to an approximately equal amount of CPU, with each allocation being a relative percentage of the available CPU. However, if some users are not using their entitlement, that entitlement is divided among the processes from other users, provided those processes want to use the resource.

Cyclic Boot Presentation Servers

When the IMA Service starts after restarting the server, it establishes a connection to the data store and performs various reads to update the local host cache. These reads can vary from a few hundred kilobytes of data to several megabytes of data, depending on the size and configuration of the farm. To reduce the load on the data store and to reduce the IMA Service start time, Citrix recommends maintaining cycle boot groups of no more than 100 servers.

Data Collector

A data collector is an in-memory database that maintains dynamic information about the servers in the zone, such as server loads, session status, published applications, users connected, and license usage. Data collectors receive incremental data updates and queries from servers within their zone. Data collectors relay information to all other data collectors in the farm. The data collector tracks, for example, which applications are available and how many sessions are running on each server in the zone.

Data Store Architecture Design

One of the most important components is the Citrix Data Store. The Datastore is a database storing the static information about the Citrix Farm. Think of settings for the load evaluator, published applications, zones and much more. When writing a design the decisions made for the Data Store can have much influence in the practical usage of the Citrix infrastructure. Type of Database First the type of database you would like to use should be determined.

DataSourceName

A DSN stores the data source information necessary for the Driver Manager to connect to the database. This can be configured either through the ODBC(Open Database Connectivity) Administrator or in a DSN file. On Windows, the information is called a system or user DSN and is stored in the Registry. Open Run and type the following command to open Microsoft ODBC Manager: %SystemRoot%\system32\odbcad32.exe. Or it is available under Control Panel–> Administrative Tools–>Data Sources(ODBC).

Demilitarized Zone

In computer networks, a DMZ (demilitarized zone) is a computer host or small network inserted as a “neutral zone” between a company’s private network and the outside public network. It prevents outside users from getting direct access to a server that has company data. (The term comes from the geographic buffer zone that was set up between North Korea and South Korea following the UN “police action” in the early 1950s.