• Citrix XenApp5.0培训
• 主讲：jaffee
• XenApp 5.0 server
• Farm：
Citrix XenApp server uses server farms to organize and manage servers.
load balance user sessions
manage the entire set of Citrix XenApp servers from a single point
Users can connect directly to applications, without needing to know the location of an individual server
reconnect to another server and receive the same environment as before when the sever crashs
• TwoTechnology
• ICA： Independent Computing Architecture
At its heart, ICA intercepts and transports screens from the server that a published application runs on to the client PC It then takes the user’s return input and transmits it back to the server for processing
ICA uses port 1494 by default, or 2598
What Is Actually Being Sent between an ICA Client and a XenApp Server?
ICA works by essentially piggybacking on top of other protocols such as TCP/IP、 UDP and IPX/SPX
The ICA client also can cache frequently used graphics such as icons and menu
items
• Citrix Session States
• TwoTechnology
• Independent Management Architecture(IMA)
It is a centralized management subsystem that allows you to define and control the elements of your server farm
Server-to-server communication occurs over TCP port 2512, PMC-to-server communication occurs over TCP port 2513
In essence, it is the technology that allows you to group servers
• Citrix Datastore
• S tore information within the Citrix XenApp server farm that remains relatively static. Items such as published applications, administrator names and permissions, and server listings
• A single datastore is used for each individual server farm
• T he datastore can reside on a Citrix XenApp server or on a dedicated host
• Citrix XenApp supports Microsoft Access, MS SQL Express, MS SQL Server, IBM DB2
• Disk space requirements for the datastore are approximately 20 MB for every 100 servers
• Datastore Usage
• Access mode: direct mode and indirect mode
Direct mode :Microsoft SQL or Oracle
Indirect mod:Microsoft Access
With the availability of three solutions for the datastore, how do you tell which one best fits your environment?
• LHC :Local Host Cache
• The LHC is a partial copy of the datastore database that every XenApp server maintains locally to the server itself
Continue running based on the configuration
that is last received from the datastore
performance
• Data Collector
• Manage information that changes frequently, such as current sessions, active licenses, and server and application load values within a zone
• The data collector acts as the central point of information when clients connect to your server farm
• Every zone with a server farm consists of one active data collector
• Bandwidth Requirements for a Server Farm
• Server-to-Data-Store Communication
KB = 275 + (5 * Servers) + (0.5 * Apps) + (92 * Print Drivers)
A farm with 4 severs,12 published applications, and 6 print drivers
KB = 275 + (5 * 4) + (0.5 * 12) + (92 * 6)
KB = 275 + (20) + (6) + (552)
KB = 275 + (578)
KB = 853
• Bandwidth Requirements for a Server Farm
• Data Collector Communication
Bytes = 11000 + (1000 * Con) + (600 * Discon) + (350 * Apps)
A server with 20 connected sessions, four disconnected sessions, and nine published applications
Bytes = 11,000 + (1,000 * 20) + (600 * 4) + (350 * 9)
Bytes = 11,000 + (20,000) + (2400) + (3150)
Bytes = 11,000 + (25,550)
Bytes = 36,550 or 36.55 KB
• Listener Ports
• Listener ports work in cooperation with internal system components and client connections
• The listener service monitors new client connections and manages the idle sessions.
• CPS4.5 vs XenApp 5.0
XenApp
2008/1
Presentation Server
MetaFrame
WinFrame
Note:
Xen App5.0:windows server 2003*/2008*
CPS4.5 :windows server 2003 *
• XenApp Server Editions
• XenApp Edition Components
• XenApp 5.0 Server License Server
• XenApp server will not accept user connections until it can contact a License Server
• Citrix provides a 96-hour initial grace period that will allow up to two users to connect while unable to connect to a License Server
• Citrix XenApp client
• the XenApp Plugin,the XenApp Web Plugin,
and Program Neighborhood
• Microsoft’s System Center Configuration Manager (SCCM) IBM’s Tivoli Provisioning Manager are used to centralize deployment and maintain software
• the XenApp Plugin
• Launch applications from her Start | Programs menu
• Step:
publishing an application to the XenApp farm
To launch an application from the System Tray icon
DISCONNECT, RECONNECT, AND LOG OFF
OF AN APPLICATION WITH THE CONNECTION CENTER
• the Citrix XenApp Web Plugin
• The Web Plugin is the simplest of the Windows clients and does not allow for as much interaction or configuration.
• often be deployed in scenarios where machines are older, slower, or not in need of additional configuration options such as the Start menu and desktop shortcuts
• Program Neighborhood
• Oldest ICA client version but the most advanced
• Many settings are available to users as check boxes or radio buttons
• good in the sense that users can enable a setting such as Local Text Echo for just their client if they are a fast typist and the latency of the session cannot keep up; and bad when a user can delete his application set and can’t get connected
• the only client that connects to applications on a Citrix server that have not been published for access by users
