This is the preferred method to transfer batch and interactive jobs. This parameter setting optimizes response time at the expense of large transfer performance. Note: The overall central processing unit time increases for the large transfer. AnyNet communications is a good performance factor for you to consider. There is additional CPU time when the crossover between the protocols processes. Hence, performance implications can be surpassed by not using AnyNet.
These products allow you to use application programs that are written for a certain communications protocol but also run over non-native communications protocols without changing or even re-compiling the application program. The choice of the destination address controls whether the request is sent over the native protocols or through the AnyNet code and on to a non-native protocol.
AnyNet is a family of products that allow applications that. For example, without AnyNet, your choice of application program interface API dictates your choice of network protocol, or your choice of network protocol dictates your choice of APIs. AnyNet allows you to mix and match applications with network protocols. In fact, you can do this without changing your application programs. Your destination address such as a remote location determines the type of network protocol to use.
The application program uses Location names to specify the source and destination address. A subsystem is a single, predefined operating environment through which the system coordinates work flow and resource usage. The run-time characteristics of a subsystem are defined in an object that is called a subsystem description.
IBM supplies several subsystem descriptions that can be used with or without modification:. For more information about creating subsystems, see the Work Management book. Communications applications that are used in an APPC advanced program-to-program environment are also available to be used in an APPN and HPR environment; only the method by which data is transported is changed. APPN performs many functions in a communications environment. DDM is a function of the operating system that allows an application program or user on one system to use database files stored on remote systems.
The systems must be connected by a communications network, and the remote systems must also be using DDM. When DDM is in use, neither the application program nor the program user needs to know if the file that is needed exists locally or on a remote system. Remote and local file processing are essentially handled the same way. To optimize APPC performance, consider the following:. With the larger record size, the CPU has less processing to do because there are fewer application reads and writes to transfer the same amount of data.
The frame size is on the line description that you choose. Many suggest that compression should be used with speeds You can use intersystem communications function ICF to write application programs that you want to communicate with advanced program-to-program communications APPC.
You must determine which system is to send data first before you write the program. ICF data management handles the communication functions and the data for your program. In particular, ICF should be used to do tasks that include repetitive, small inputs. To create device descriptions to get your system set up for ICF, do the following:. Use the online help information to choose the parameter values.
The device description is created. To add or change communications entries to get the system set up for CPI Communications, do the following:. Use the online help information to change, add, or remove parameter values.
The communications entries are added, changed or removed. This configuration requires the coordination of parameters and values. In addition, some of the parameters that are listed may not apply to your particular configuration.
The following table lists only the lowest level definition statement that is used by the host system. Welcome to ManualMachine. We have sent a verification link to to complete your registration. Log In Sign Up. Forgot password? Enter your email address and check your inbox. Please check your email for further instructions. Enter a new password. Contents Part 1. Print this topic. Common networking standards.
Part 1. Chapter 1. To save a PDF on your workstation for viewing or printing: 1. Click Save As Chapter 2. Depending on the type of hardware you have, you may need to refer to the following topics: v Creating a network server description v Creating a network interface description 2. Creating a network interface description Network interface descriptions for asynchronous transfer mode ATM , frame relay, and integrated services digital network ISDN protocols describe the communications interface.
To create a network interface description, do the following: 1. Creating a network server description A network server description describes which Integrated PC Server the local area network LAN and the application will be using. To create a network server description, do the following: 1.
To create line descriptions, do the following: 1. To achieve the best performance with your particular communications environment, you may want to review these topics: v Improving wide area network WAN performance. To adjust the line speed for your wide area network, perform these tasks: v Check the difference in performance between half-duplex utilization and full-duplex utilization on the line description.
Additional considerations for adjusting the wide area network line speed are the following: v A common misconception about the line speed of each attached communications line is that central processing unit CPU resource is used in a uniform fashion. WAN line speed considerations for IOPs When configuring a communications controller, you should consider both subsystem storage and aggregate line speed. Optimizing communications performance 9. Improving data path performance To assess the performance of your data path, you may want to review the following topics: v Considerations for subsystem configuration for error recovery performance v Communications performance considerations for interactive jobs v Consider communications performance for batch jobs.
As the number of users on the system increases, you must consider the importance of how subsystems are configured: v Consider limiting the number of devices that are serviced by a single subsystem. Use the following recommendations to divide these users: — The number of users in any given subsystem — The connectivity used to access the system — The type of work the users do — The geographic location of the users v Create additional communications and interactive subsystems to split the work into multiple subsystems.
Optimizing communications performance Example: Communications subsystem configuration 1. Communications performance considerations for interactive jobs An interactive job is one that uses a keyboard and character-type display. To optimize communications performance for interactive jobs, consider the following: v Attach work stations through communications requires more CPU overhead than local workstations.
Example: Interactive subsystem configuration 1. To optimize batch jobs for communications, consider the following: v Break the application into pieces and having multiple batch threads jobs operate concurrently. Mixing interactive and batch jobs on a WAN line When interactive users and large transfers are running on a communications line concurrently, you may need to change configuration parameters.
Performance considerations for AnyNet communications AnyNet communications is a good performance factor for you to consider. To optimize AnyNet performance, consider the following: v For send and receive pairs, the most efficient use of an interface is with its own protocol stack.
Subsystems A subsystem is a single, predefined operating environment through which the system coordinates work flow and resource usage. Communications applications Communications applications that are used in an APPC advanced program-to-program environment are also available to be used in an APPN and HPR environment; only the method by which data is transported is changed. Distributed data management DDM DDM is a function of the operating system that allows an application program or user on one system to use database files stored on remote systems.
Performance considerations for intersystem communications function You can use intersystem communications function ICF to write application programs that you want to communicate with advanced program-to-program communications APPC.
To optimize ICF performance, consider the following: v Eliminate unused record formats. To create device descriptions to get your system set up for ICF, do the following: 1.
To optimize CPI Communications application programs, do the following: v Minimize the use of flush and confirm. To add or change communications entries to get the system set up for CPI Communications, do the following: 1. Communications applications Regards David Fowle. For more information check out our web site or contact me directly via email. Ash Bowers abowers at email. It works really good. You have the possibility to define your bookmarks within the PDF or which keyposition should be used to be a bookmark and so on.
Just have a look. Bye Erik ccc schrieb:. Works with both Distiller and PDF. Simply set one or the other as your "printer driver" for the session, move your spool files to that outq, and away she goes. Works great for us too. Reply to author. Report message as abuse. Show original message. Andrew Hancock - VMware vExpert. See if this solution works for you by signing up for a 7 day free trial.
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