Named PIPES in Suse Linux

Question

we have an SAP process using named PIPES and we were asked to check the shared memory config (IPCS) , i wanted to ask does named PIPES use shared memory at all ? and where are the contents of the file written , can this be viewed .

This is how the file looks like :

prwx------ 1 aaxadm sapsys 0 Apr 21 11:20 MIGRATE_DT_00008.PIPE

we are on

SUSE Linux Enterprise Server 11 (x86_64)
VERSION = 11
PATCHLEVEL = 2

Thank you Jonu Joy

Answer 1

While a named pipe exists in the file system, it is actually used only when both the read end and the write end are opened and connected to some program.

A closed pipe cannot contain data, so no data is ever written to disk; the data exists only in memory.

The data is transferred only between these two programs, not shared with an arbitrary number of processes, so this is not shared memory.