IBM AS/400e, User Handbook Manual

Page: 526 / 834

Operating System/400, 5769-SS1
496
AS/400e System Handbook
You can interact with any of the file systems through a common interface. This interface is
optimized for the input/output of stream data, in contrast to the record input/output that is
provided through the data management interfaces. The provided commands, menus and
displays, and application program interfaces (APIs) allow interaction with the file systems
through this common interface.
Note: The QNTC file system lets you share data with servers that can communicate using the
Windows NT LM 0.12 dialect. The SMB server (AS/400 support for Windows Network
Neighborhood) does not use the Windows NT LM 0.12 dialect. The QNTC file system can
communicate with Windows NT servers. This includes a standalone server and any NTAP
servers running in the domain.
Integrated File System Enhancements
The integrated file system has been enhanced to include:
• Large file enablement
User applications can store and manipulate very large files in the integrated file system,
including:
– Stream file sizes up to 256 GB in the root (/), QOpenSys, and user-defined file
systems
– A new set of 64-bit UNIX-type APIs and easy mapping of existing 32-bit UNIX-type
APIs to 64-bit APIs. A user application can access large file sizes, offsets, and data
using 64-bit APIs.
• Thread-enablement
The threadsafe integrated file system API interfaces can access objects in the following
file systems in a multi-threaded job:
– QSYS.LIB
– QOPT
– QLANSrv
• Write performance improvements
Significant improved response time and capacity when performing write operations in the
root (/), QOpenSys, and user-defined file systems.
– NFS Version 3 support : Support is added to the NFS client and server for large file
access.
– Stream file capability : Stream files in the integrated file system can be edited through
the 5250 interface (using the new EDTSTMF command) and through Operations
Navigator.