3.12 Changing the maximum number of concurrent transmissions

The maximum number of concurrent transmissions is the same as the permitted maximum number of concurrent FTP connections (control). Any transmission requests in excess of this value will be rejected. For details about rejection of transmission, see F. Transmission Rejection Messages.

The default for the maximum number of concurrent transmissions is 64. You can change the maximum number of concurrent transmissions to any value in the range from 64 to 128.

If you have changed the maximum number of concurrent transmissions, the following settings are initialized the next time you start the JP1/FTP daemon:

• Transmission log

• Transmission number

• Connection number

• Protocol trace

• Module trace

When settings are initialized, their previous status is deleted. Therefore, we recommend that you back up any needed information before you start the JP1/FTP daemon. For details about the information to back up, see (2) Log information in 3.7.1 Information that can be saved and recovered. When you restore from the backup, make sure that the maximum number of concurrent transmissions is set to the same value as when the backup was created. If the maximum number of concurrent transmissions at the time the backup was made does not match the number at the time of recovery, the JP1/FTP daemon will not start.

When you restore from initialized status, the JP1/FTP daemon might be delayed temporarily. To avoid this delay, delete the above settings beforehand. The deletion tool enables you to do this easily. For details about the deletion tool, see G. Log Information Deletion Tool.

To change the maximum number of concurrent transmissions:

1. Terminate the JP1/FTP daemon.

   Use the ftsstop command. For details about the command, see ftsstop - terminates the JP1/FTP daemon in 6. Commands.

2. Change the maximum number of concurrent transmissions.

   Use the ftsutil command. For details about the command, see ftsutil - changes and displays environment information in 6. Commands.

3. Start the JP1/FTP daemon.

   Use the ftsstart command. For details about the command, see ftsstart - starts the JP1/FTP daemon in 6. Commands.

Example: This example changes the maximum number of concurrent transmissions to 128.

By default, when an FTP server receives a number of requests that exceeds the maximum number of concurrent transmissions, it does not output to the system log a message stating that the maximum was exceeded. You can use the environment variable JP1FTS_CLMAXOVER_MES to output such a message to the system log.

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