16.10 - Open Pipes Restriction - Access Module

Teradata Tools and Utilities Access Module Reference

prodname
Access Module
vrm_release
16.10
created_date
July 2017
category
Programming Reference
featnum
B035-2425-077K

The number of open pipes is limited to one per instance of the Teradata Access Module for Named Pipes under the following conditions:

  • When you specify a fallback data file name

    The one-to-one relationship between open pipes and fallback data files imposes this restriction. To avoid this constraint, allow the Teradata Access Module for Named Pipes to assign the fallback data file names by specifying only a directory name or accepting the default directory name for fallback data files.

  • When you use unnamed pipes on a SPARC system running Oracle Solaris

    Because a file descriptor file system device can be opened by more than one process at the same time, you cannot allow the Teradata Access Module for Named Pipes to generate default fallback data file names when using unnamed pipes. Instead, you must specify a fallback data file name for the unnamed pipe, thereby imposing the one-pipe-per-instance restriction.

There must be no file in the directory in which the named pipe is created for data transfer that has same name as the named pipe.