OpenTP1 may use DNS or NIS to translate an IP address or obtain an RPC transmission target from a defined host name. Whether these facilities are used depends on the operating system environment that OpenTP1 uses.

If a failure occurs in DNS or NIS, the transaction processing time may become longer or OpenTP1 or UAP may not be able to start.

To prevent this, design the system taking the following points into account:

• High reliability
  Improve the reliability considering the design of an alternative server or resolution within the local server if a failure occurs in the DNS or NIS server.
  
• Performance
  If OpenTP1 uses DNS or NIS, communication may occur when it obtains an address from the host name. Design the system considering this overhead.