Open systems <a href="http://www.setgetweb.com/p/iSeries/v5r3/rzaaxmstfsknow.htm">file system</a> (<a href="http://www.setgetweb.com/p/iSeries/v5r3/rzaaxmstuseqopensys.htm">QOpenSys</a>)

Integrated File System Introduction

Open systems file system (QOpenSys)

The QOpenSys file system is compatible with UNIX-based open system standards, such as POSIX and XPG. Like the "root" (/) file system, this file system takes advantage of the stream file and directory support that is provided by the integrated file system.
In addition, it:

Is accessed through a hierarchical directory structure similar to UNIX systems.
Is optimized for stream file input/output.
Supports multiple hard links and symbolic links.
Supports case-sensitive names.
Supports local sockets.
Supports *OOPOOL objects.
Support threadsafe APIs.
Supports *FIFO objects.
Supports the journaling of object changes.

The QOpenSys file system has the same characteristics as the "root" (/) file system, except it is case-sensitive to enable support for UNIX-based open systems standards.
For more information on QOpenSys, see Use QOpenSys.
For information about *TYPE 1 to *TYPE2 directory conversions and QOpenSys file system restrictions, see *TYPE2 directories.
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