Interstage Shunsaku Data Manager Operator's Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

4.2.1 Adding Searchers and Search Servers

Search servers are added for the following two reasons:

• To increase search speed
• To handle future increases in amounts of data

Add search servers when it is necessary to meet one or both of these objectives.

Search servers can be added while the system is operating.

If the server has spare capacity and it is desirable to increase the search speed, or if the amount of data is likely to increase in the near future, it is also possible to add searchers on their own.

The following diagram shows an example of how to add a search server to increase search speed.

[Figure : Example of Adding Search Server to Improve Search Speed]

The following diagram shows an example of how to add a search server to handle future increases in data volumes:

[Figure : Example of Adding Search Servers to Respond to Increased Amounts of Data]

Follow the procedures shown below to add a search server.

1. Install and set up a searcher on each additional search server.

   

   If a searcher is to be added without adding a search server, the searcher does not need to be installed. It is sufficient to simply set up the searcher.

   

   Refer to Installation and Setup with Additional Search Servers in Chapter 3, Shunsaku System Installation and Setup of the Installation Guide for more information on installing searchers.

2. Edit and distribute the system environment file.

   Edit the system environment file by adding the following execution parameter:

   Execution parameter name	Meaning	Explanation
   Searcher	Server information for searchers	Add all of the information for searchers on the search server being added

   

   Edit the system environment file on the director server where the conductor is located.

   

   • Distribute the system environment file to the "\etc\system" folder in the Shunsaku installation folder on all servers.

   

   • Distribute the system environment file to the /etc/opt/FJSVshnsk/etc/system directory on all servers.

3. If host names have been specified in the server information for searchers without using IP addresses, specify the IP addresses and host names of the additional search servers in the following file on the director server where the conductor is located.

   

   Windows installation folder\system32\drivers\etc\hosts

   

   /etc/hosts

4. Reflect the information for the newly registered searchers on the director by executing the shunsyscfgedit command on the director server that contains the director where the searchers have been registered.

   shunsyscfgedit -n  Shunsaku system name

   
   
5. Execute the shunsysstart command on the additional search server to start the searchers.

   shunsysstart -n  Shunsaku system name

6. Execute the shundstate command on the director server to check that the operating status of the additional searchers is ACTIVE.

   shundstate -s  director identifier -p

7. For the system that searcher servers are added to improve search performance, execute the shundresend command on the director server and redistribute the search data.

   shundresend -s  director identifier

   

   • Simply starting the additional searchers does not reallocate search data. In order to improve search speed, reallocate search data by executing the shundresend command.
   • Data cannot be updated until search data has been reallocated using the shundresend command.
8. For the system that searcher servers are added to improve search performance, execute the shundstate command on the director server to check that the search target data has been allocated evenly to each searcher.

   shundstate -s  director identifier -p

   
   

Refer to 6.2.3 Monitoring Director Operation Information for more information on the content displayed by the shundstate command.