Ransomware attackers specifically target and attempt to destroy backup systems to increase the probability of payment. Hardening your system is critical. Please ensure you have reviewed your platform security using the Security Hardening Checklist
This parameter specifies the buffer size, in bytes, for stream-based backups. NetBackup receives data from MaxDB through the stream (pipe). When MaxDB passes the data to NetBackup, it uses this buffer size. Also see the restore_stream_buffersize parameter.