9.14 Limiting the maximum concurrent downloads of distributed applications

When you allow users to initiate the download and installation of applications themselves, considerable load might be placed on the network if multiple smart devices download applications simultaneously, and this can impact other business processes. In these circumstances, you can reduce the load on the network by limiting the maximum number of concurrent downloads.

Procedure

1. On the communication server, open the httpsd.conf.

   The httpsd.conf file is stored in the following location:

   JP1/ITDM2 - SDM (Communication Server)-installation-folder\cms\uC\httpsd\conf

2. Change the value of the QOSRejectionServers directive in the httpsd.conf file.

   Specify the QOSRejectionServers directive as follows:

   Location	Directive name	Specifiable range	Description
   Inside <Location /download/> in <VirtualHost localhost:26055>	QOSRejectionServers	5 to 49 default: 5 (maximum concurrent downloads: 45)	Specify the maximum concurrent downloads as the value of 50 - value-of-QOSRejectionServers.

   Example

   Listen 26055
   <VirtualHost localhost:26055>
       SSLEnable
       SSLProtocol TLSv11 TLSv12
       SSLRequiredCiphers DES-CBC3-SHA:AES128-SHA:AES256-SHA
       SSLCertificateFile "C:/Program Files/Hitachi/.../newcert.pem"
       SSLCertificateKeyFile "C:/Program Files/Hitachi/.../newkeyRSA.pem"
       <Location /download/>
            Allow from all
            QOSRejectionServers 5
       </Location>
   </VirtualHost>

3. Restart the JP1/ITDM2 - Smart Device Manager Web Server on the communication server.

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