About Linux concurrent FT connections
NetBackup uses the Maximum concurrent FT connections setting in the Fibre transport host property to configure the number of concurrent connections to a Fibre transport media server, up to the total that is allowed per host.
See Fibre Transport properties.
If the total number of concurrent connections on Linux is too low for your purposes, you can increase the total number of concurrent connections. The consequence is that each client backup or restore job uses fewer buffers, which means that each job is slower because of fewer buffers. To increase the number of concurrent connections, reduce the number of buffers per connection. To do so, create the following file and include one of the supported values from Table: Supported values for buffers per FT connection in the file:
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_FT
Table: Supported values for buffers per FT connection shows the values that NetBackup supports for the NUMBER_DATA_BUFFERS_FT file. NetBackup supports 644 buffers per media server for Fibre transport.
Table: Supported values for buffers per FT connection
| Total concurrent connections: NetBackup 5230 and 5330 and later appliances | Total concurrent connections: Linux FT media server |
|---|---|---|
16 | 40 | 40 |
12 | 53 | 53 |
10 | 64 | 64 |
If you want, you then can limit the number of connections for a media server with the setting in the Fibre transport host properties.