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How to Administer TREX for SAP
GTS
Applies to:
SAP BusinessObjects Global Trade Services 8.0
For more information, visit the Governance, Risk, and Compliance homepage
Summary
Search and Classification TREX provides SAP applications with numerous services for searching,
classification, and text-mining in large collections of documents (unstructured data) as well as for searching
in and aggregating across business objects (structured data). This document shows how to administer TREX.
Author: Prarit Sehgal
Company: Regional Implementation group
Governance, Risk, and Compliance
SAP BusinessObjects Division
Created on: 16 September 2009
Version 1
SAP COMMUNITY NETWORK SDN - sdn.sap.com | BPX - bpx.sap.com | BOC - boc.sap.com
© 2009 SAP AG
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Typographic Conventions
Type Style Description
Example Text Words or characters quoted
from the screen. These
include field names, screen
titles, pushbuttons labels,
menu names, menu paths,
and menu options.
Cross-references to other
documentation
Example text Emphasized words or
phrases in body text, graphic
titles, and table titles
Example text File and directory names and
their paths, messages,
names of variables and
parameters, source text, and
names of installation,
upgrade and database tools.
Example text User entry texts. These are
words or characters that you
enter in the system exactly asthey appear in the
documentation.
<Example
text>
Variable user entry. Angle
brackets indicate that you
replace these words and
characters with appropriate
entries to make entries in the
system.
EXAMPLE TEXT Keys on the keyboard, for
example, F2 or ENTER.
Icons
Icon Description
Caution
Note or Important
Example
Recommendation or Tip
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© 2009 SAP AG
Table of Contents
1. Business Scenario............................................................................................................... 1
2. Background Information ..................................................................................................... 1
3. Prerequisites ........................................................................................................................ 2
4. Step-by-Step Procedure ...................................................................................................... 3
4.1 Starting the TREX admin tool ....................................................................................... 3
4.2 Connecting TREX with an Application .......................................................................... 3
4.2.1 Connecting TREX with an ABAP Application (RFC Connection) .................... 4
4.3 TREX Administration .................................................................................................. 11
4.3.1 Starting and Stopping TREX .......................................................................... 11
4.3.2 TREX Admin Tool .......................................................................................... 11
4.3.3 Data backup and Restore for TREX .............................................................. 16
4.4 Connecting TREX with a Java Application (HTTP Connection) ................................. 17
5. FAQ ..................................................................................................................................... 18
5.1 Stopping TREX with the TREX Admin Tool ............................................................... 18
5.2 Selecting Languages for TREX Language Recognition ............................................. 19
6. Comments and Feedback ................................................................................................. 21
7. Copyright ............................................................................................................................ 22
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1. Business Scenario
Search and Classification TREX provides SAP applications with numerous services for searching,classification, and text-mining in large collections of documents (unstructured data) as well as for
searching in and aggregating across business objects (structured data). TREX processes documents
in a wide variety of formats and languages.
TREX administration is organized into the following areas:
Ɣ Starting and Stopping TREX
To start and stop TREX, you use the SAP Management Console and the executable filesstartsap.exe and stopsap.exe (Windows) or the Shell scripts startsap and stopsap (UNIX).
Ɣ TREX Admin Tools
TREX provides the following administration tools:ż TREX Monitor in the portal
You use this tool if you are implementing the Knowledge Management functions in theportal.
ż TREX Admin Tool in the SAP System
You use this tool if TREX is connected to an SAP system.
ż TREX Admin Tool (Stand-Alone)
You can use this tool independent of a portal or an SAP system.
Ɣ Data Backup and Restore for TREX
You can make a backup of a TREX installation, and restore the TREX installation using thebackup version if problems occur.
Ɣ Administration of the Search Engine Service
The Search Engine Service (SES) enables users to search for business objects using TREX. Asan administrator, you complete the initial configuration of the search engine service and monitor it during routine operation.
2. Background Information
TREX is based on client/server architecture. The client component is integrated into the applicationthat uses the TREX functions, and allows communication with the TREX servers. The server
component processes the requests; it indexes and classifies documents and answers search queries.
The client component is subdivided into the Java client and ABAP client. The server component is
subdivided into the following servers:
Ɣ Web server with TREX extension
Ɣ RFC server
Ɣ Queue server
Ɣ Preprocessor
Ɣ Index server
Ɣ Name server
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3. PrerequisitesThe TREX in installed, the user has access to TREX admin tool. You must create an SAP user that
the TREX admin tool (stand-alone) can use to log on to the SAP system. In addition, the SAP user is
required so that the TREX alert server has permission to regularly test and check the RFC
configuration.
The TREX admin tool (stand-alone) is used to configure and monitor TREX. You also use this admin
tool to configure the RFC connection between TREX and the ABAP application that is using TREX. To
use the TREX admin tool (stand-alone) to create the RFC destination, the admin tool requires an SAP
system user that you create based on the predefined role SAP_BC_TREX_ADMIN. This user then has
the authorization required to configure the RFC connection.
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4. Step-by-Step Procedure
4.1 Starting the TREX admin tool
Log on with the user <sapsid>adm, and carry out one of the following steps
Operating system: UNIX
Procedure:
Enter the following:
cd <TREX_DIR>
./TREXAdmin.sh
Operating system: Windows
Procedure:
Start the TREX admin tool by double-clicking <TREX_DIR>\TREXAdmin.bat in Windows Explorer
4.2 Connecting TREX with an Application
TREX can communicate with the application using it by means of an HTTP connection or an RFC
connection:
Ɣ An ABAP application accesses TREX by means of an ABAP client (RFC connection) As a rule,
ABAP applications communicate with the TREX servers by means of the TREX ABAP client using the
RFC/SNC protocol. Communication takes place using an instance of the SAP Gateway and an RFC
server.
Ɣ A Java application accesses TREX by means of a Java client (HTTP connection) As a rule, Java
applications communicate with the TREX servers by means of the TREX Java client using the HTTP
or HTTPS protocol. This communication takes place using a Web server that is enhanced with TREX-
specific functions.
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4.2.1 Connecting TREX with an ABAP Application (RFC
Connection)
As a rule, ABAP applications communicate with the TREX servers by means of the TREX ABAP client
using the RFC/SNC protocol. Communication takes place using an instance of the SAP Gateway and
an RFC server. You configure the RFC connection using the TREX admin tool (stand-alone).
Creating a SAP System User for the TREX Admin Tool
Procedure
Create an SAP system user for the TREX admin tool (stand-alone) and assign the
SAP_BC_TREX_ADMIN role to this user.
1. Launch transaction SU01 (user maintenance) or choose Administration ĺ System Administration ĺ
User Maintenance ĺ User in the SAP menu. The User Maintenance: Initial Screen appears.
2. Enter a new user name and choose Create.
3. On the Address tab page, enter the personal data for the user.
4. On the Roles tab page, assign the SAP_BC_TREX_ADMIN role and thus the permission to access
the SAP system to the SAP system user for the TREX admin tool (stand-alone).
Determining the SAP System Connection Information
The TREX admin tool (stand-alone) can connect to an SAP system in two ways.
Ɣ Through a specific application server of the SAP system (variant A)
Ɣ Through the message server of the SAP system (variant B)This variant uses the load-balancing function for the SAP system. The message server assigns therequest from the TREX admin tool to any application server.
Depending on the variant used, the TREX admin tool requires different connection information for theSAP system. You must determine the connection information and specify it later in the TREX admintool.
NOTE: SAP recommends using variant B. Variant A has the disadvantage that the connection does
not work if the application server is not available.
Procedure
1. Open the SAP Logon.SAP Logon is the program that you use to log on to an SAP system.
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2. Note the following connection information:
...
Connection Setup Type Required Connection Information
Through an application server (variant A)
Ɣ SAP system ID (SID)
Ɣ System number
Ɣ Application server host name
Through the message server (variant B)
Ɣ SAP system ID (SID)
Ɣ Logon group, such as PUBLIC
Ɣ Message server host name
Configuring the RFC Connection in the TREX Admin Tool
You work through the steps below using the TREX admin tool
Creating a Connection
1. On the RFC: Current tab page in the Landscape: Connectivity window, choose the CreateConnection function.
2. Choose connection type A or B. Specify the connection data for the SAP system.
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3. Specify the SAP system user, the associated password, and the client that the TREX admin toolis to use to log on
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If the SAP system user in question exists in the default client, you do not need to specify the client.
Now click on “RFC Destination”
Add details, “SAP System”, “RFC Destination, and click “save”
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Check the “Configuration Status”, it should be green
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After performing the above steps RFC connection is created in SM59. Go to transaction SM59
Click drop down “TCP/IP connection”
Double click the RFC connection created “TREX_11”
Click “Connection Test”
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You should get a similar screen as below
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4.3 TREX Administration
4.3.1 Starting and Stopping TREX
You use the following executable files and scripts to start and stop TREX on windows and UNIX:
Windows
Ɣ TREX admin tool (standalone)
Ɣ The startsap.exe and stopsap.exe executable files
Ɣ SAP Management Console As of TREX 7.10, the SAP Management Console is a snap-in in the MicrosoftManagement Console (MMC) and is no longer part of the TREX installation. To startTREX with the SAP Management Console, you must install the console in your TREXsystem first.
UNIX
Ɣ TREX admin tool (standalone)
Ɣ The startsap and stopsap shell scripts
4.3.2 TREX Admin ToolYou can use this tool independently of a portal or an SAP system.
The TREX admin tool provides all functions for configuring and monitoring TREX. You can use thistool to configure a distributed TREX system, to configure the RFC connections, to administrate deltaindexes, and to trigger performance traces. In addition, this tool provides detailed technical informationabout the components of a TREX system. Using periodically executed checks, it can monitor thesystem status automatically. In the event of errors, you are informed by e-mail so that you can takeappropriate action
4.3.2.1 TREX MonitoringThe TREX Monitor offers the following functions:
Function Short Description
Server Status Displays the status of the TREX server.
You can see which hosts TREX servers are installed on, andwhether the servers are available. The server status isdisplayed first when you navigate to the TREX Monitor .
Display Queues Displays the status of queues.
See Monitoring Queues.
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Display Queue Entries Displays information on the processing of documents in aqueue.
See: Information on Processing Documents
Edit Queue Parameters For displaying and Changing Queue Parameters
See: Queue Parameters
Delete Queue Entries For deleting a document from the queue if errors occur.
See: Deleting Documents from a Queue
Change Queue Status For stopping queues and reactivating them, and triggering thecomplete processing of a queue.
See:
Suspending a Queue
Activating a Queue
Triggering the Processing of a Queue
Reset Failed Document Entries For resetting the error status of documents. This affectsdocuments that have not been preprocessed, indexed, or optimized.
See: Resetting the Error Status
Display Index Details For displaying Index Parameters
See: Displaying Index Parameters
Search and Classification
Cache
For emptying the search and classification cache.
See: Emptying the Search and Classification Cache
4.3.2.2 TREX Admin tool in SAP System
In SAP systems, you can call a tool for administrating TREX by calling transaction TREXADMIN. Youcan use this tool to administrate the queues, monitor TREX, and display information about thecomponents in a TREX system.
In the Connection to RFC Server field, use the RFC destination to choose which TREX system youwant to administrate.
Once you have selected the RFC destination, the administration areas become active.
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RFC Monitor tab lets you do a connection test as shown below
The following administration areas are available in the TREX admin tool in the SAP system(transaction TREXADMIN):
Tab Description
Queue Administration
Queue Administration
This tab page is only relevant if indexing takes place using thequeue server.
You can monitor queues, configure queue parameters, andtroubleshoot here.
More information: Queue Administration Tab Page.
QueueLandscape
This tab page is relevant only for distributed TREX systems andonly if indexing is done using a queue server.
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Here you can see the distribution of the queues among the differentqueue servers.
More information: Queue Landscape Tab Page.
Index Administration
Index Admin
This tab page displays technical information on indexes.
For example, here you can see the time of the last indexing, thenumber of searchable documents, or the disk space taken up by theindex.
Index Hierarchy
This tab page displays the hierarchical structure of an index.
It shoes the index type of an index. In the case of a split index, youcan see which index parts it consists of.
More information: Index Types.
Join Index Info This tab page displays technical information about compoundindexes and BIA indexes.
Index
Landscape
This tab page is only relevant for distributed TREX systems.
Here you can see the distribution of the indexes among the differentindex servers. In addition, you can check the index replication
status.
For more information, see Index Distribution and Index ReplicationStatus.
Usage This area displays information about index use and statistics.
Search You can trigger searches from the Search tab page. You use thisfunction for test purposes only.
Attribute Mining You can use this TREX function to display the statistical distributionof attributes in an index.
Cruiser Administration
Cruiser
You use this tab page to administrate and configure the TREXcruiser components. The TREX cruiser enables a file search on fileservers and Web servers. TREX then indexes the files that areextracted from the searched file and Web servers.
More information: Cruiser Administration.
Note
For more information on using and optimizing the TREX cruiser, see
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SAP Note 1110112 – TREX 7.0/7.1: How to use the TREX Cruiser.
Landscape Administration
Summary This tab page provides an overview of the TREX status withinformation on the TREX version, operating system, and currenterror messages.
Alert
This tab page is used to monitor TREX. Checks are performedperiodically and in the event of errors, you can be notified by e-mail.
For more information, see TREX Alert Server .
Reorg
This tab page enables the reorganization of the indexes in a TREXlandscape.
More information: Reorganization of the TREX Landscape.
Topology This tab page displays technical information on a TREX system.
For more information, see Topology Information.
Ini Files
Displays the TREX configuration files.
You can display the content of the configuration files and change it
if necessary.
Caution
Changing configuration files directly requires expert knowledge of the TREX architecture and TREX-internal processes. Only makedirect changes to the configuration files if those changes aredescribed in the TREX documentation.
Hosts
This tab page displays information on the installation directory,operating system platform, and installed TREX release.
More information: Information on TREX Servers (TREXADMIN)
Services
Displays the load on the TREX servers in a table. There is aseparate row for each TREX server.
More information: Information on TREX Servers (TREXADMIN)
Threads
On the Threads tab page, you can see which threads are currentlyexecuting which methods. You can also see how long processing of a method has taken so far.
More information: Information on TREX Servers (TREXADMIN)
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Handles
On the Handles tab page, you can see the number of handles that aprocess has generated and is using.
More information: Information on TREX Servers (TREXADMIN)
Trace
Displays the trace files of the TREX servers.
By default, the trace files contain all error messages that the TREXservers output. You can display the contents of a trace file bydouble-clicking it. You can download the trace files.
Landscape
This tab page displays the configuration of a distributed TREXsystem. You can only display data here. You configure a distributedTREX system using the TREX admin tool (standalone).
For more information about setting up and configuring a distributedTREX system, see Distributed TREX Systems (Multiple HostInstallation) and Setting Up a Distributed System.
RFC Monitoring
This tab page shows whether or not all of the SAP systemapplication servers have a connection to the TREX system.
If there are errors here, they can have the following causes:
x The application server is communicating through an SAPgateway that has not been started.
x The parameters of the RFC destination do not match the
TREX configuration.
x No TREX RFC server has registered with the SAP gateway.
Note
The window shows only whether the connection from withinthe SAP system works. It does not display whether theconnection works from within the TREX system.
The TREX admin tool (standalone) displays the completestatus of the RFC connection and allows you to configurethe RFC connection and correct the error.
For more information on the RFC connection betweenTREX and the application using TREX, see Configuring and Administrating the RFC Connection.
4.3.3 Data backup and Restore for TREX
You can back up Search and Classification (TREX), and restore the TREX installation using thebackup version if problems occur (backup and restore).
You can back up and restore TREX in the following ways:
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x Data Backup (Online) and Restore
You back up TREX indexes and queues online using Python scripts without stopping TREX
and while the TREX search continues to be available. You then restore the saved data offline.This is the usual way to back up TREX data. It is a good idea to back up the TREX indexes if the original index creation process took a long time and you want to avoid having to reindex if the full-text information is lost. SAP also recommends that you back up your data if a largenumber of documents have been added to an index since the original indexing process.
x Complete Data Backup and Restore (Offline)
You back up a complete TREX installation (TREX indexes and configuration) offline andrestore it again. You do this only in special circumstances, particularly to back up the settingsin a TREX configuration. In this case, the complete data backup and restore of the TREXinstallation can take the place of a new installation.
4.4 Connecting TREX with a Java Application (HTTP
Connection)
As a rule, Java applications communicate with the TREX servers by means of the TREX Java client
using the HTTP or HTTPS protocol. This communication takes place using a Web server that is
enhanced with TREX-specific functions. The TREX Java client needs to know the address of the
TREX name server in order to communicate with the TREX servers. You specify the address of the
TREX name server, and, in the case of a distributed TREX installation, of the TREX backup name
server, in the SAP NetWeaver Administrator.
Procedure
You have to specify the address of the TREX name server in the SAP NetWeaver Administrator bynaming the following values <host_name_of_trex_host>:<name_server_port>:
Ɣ <host_name_of_trex_host>: name of the host on which TREX is installed and where the TREXname server runs.
Ɣ <name_server_port>: port of the TREX name server
1. You can determine the TREX name server address in two ways:
a. Start the TREX admin tool. Determine the address of the name server using Landscapeĺ Tree ĺ topology ĺ globalsĺ all_masters.
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b. Determine the port of the TREX name server by means of the following rule:<name_server_port>: 3<instance_number>01
On UNIX, navigate to following location or path shown below.
2. Use the user <j2eeadm> to log onto the host on which the Application Server Java is running.
3. Start the SAP NetWeaver Administrator and log on to the AS Java .
4. Navigate to Configuration Management ĺ Infrastructure Management ĺ Java SystemProperties.
5. In the new screen go to the tabulator Services in the screen area Details and type intrex.service to filter the available services.
6. In the Extended Details area under the tabulator Properties enter the address of the TREXname server into the parameter nameserver.address:tcpip://<host_name_of_trex_host>:<name_server_port>
You enter only the host name or the host name and the domain depending on your networkenvironment.tcpip://mytrexhost:34801 or tcpip://mytrexhost.mydomain:34801
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The address of the TREX name server must be configured for all server processes of the cluster.Otherwise the connection between the AS Java and TREX cannot be established.
7. In case of a multiple host scenario for a distributed TREX landscape you enter the addresses of the TREX backup name servers in the parameter nameserver.backuplist. Specify the address of the TREX backup name servers, separated by comma in the format:tcpip://<host1>:<port1>,tcpip://<host1>:<port1>, …
For a TREX single-host installation you do not need to specify backup name servers.
8. Save your changes and confirm the restart of the service.
5. FAQ
5.1 Stopping TREX with the TREX Admin Tool
1. Log on with the user <sapsid>adm.
2. Start the TREX admin tool by double-clicking <TREX_DIR>\TREXAdmin.bat in WindowsExplorer.
3. In the TREX admin tool, navigate to the Landscape Services area and then go to the MMC tab.
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4. You can stop TREX by clicking the SAP System: Stop button or by selecting the TREX host,opening its context menu with the secondary mouse button, and selecting the relevant option.You can stop Selected Hosts or All Hosts for a landscape.
5.2 Selecting Languages for TREX Language
Recognition
TREX supports the indexing and analysis of documents in different languages. You can selectlanguages to be identified by TREX language recognition.The language of a document is needed so that the document in question can be placed in the correctlanguage version of the index. For each language that you select, TREX creates a seperate languageindex For example, if you select English, German, and French, TREX English, one German, and oneFrench language index.
Procedure1. Start the TREX admin tool
2. In the preprocessor: Admin window, navigate to the Languages tab page.
The Languages for Document Analysis area contains an overview of language TREX supports. In this
area, select the languages that you want TREX to identify by means of document analysis.
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7. Copyright
© 2009 SAP AG. All rights reserved.
No part of this publication may be reproduced or transmitted in any form or for any purpose without the express permission of SAP AG. The information contained herein may be changed without prior notice.
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