IFS

Integrated File System

Since its origin AS/400 uses a 3 level file hierarchy :

• Library
• File
• Member

These files are called " native ".

TBT/400 operates on this hierarchy in its file history functionality in different ways, according to its parameterization :

• Monofile / Multimembers : simplest method, but all files are required to have the somr record length.

• Multifiles / Monomember : method raising the preceding restriction but polluting the library by the multiplication of the files objects.

• Multifiles / Multimembers : compromise between the two preceding methods, the file names including the record length.

• Multifiles/Multimembers : improvement of the preceding method, the file name also including the current date.

The IFS (Integrated File System) is a component of the OS/400 allowing access in " Stream " mode in input as well as output, access that are similar to the PC and UNIX worlds.
More and more AS /400 applications are now using the " Root "files instead of " native " files.

Thus, TBT/400 has adapted itself to this need and allows to manage this type of file in transmission as well as in receipt.

To that purpose, a major directory is created in the IFS " Root " for each TBT/400 instance used.

Of course, this possibility coexists with the conventional management of TBT/400.

TBT/400 also processes the historization and cleaning of these IFS files.