PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

2.1 GFS Local File System

The GFS Local File System is an extent-based file system that can be used under the following operating systems:

• 32-bit/64-bit of Solaris 8 OE
• 32-bit/64-bit of Solaris 9 OE

This file system is an extended version of UFS, a representative UNIX file system that provides improved applicability and performance.

The major functions of the GFS Local File System are as follows:

• Multi-partition configuration implemented by allocating multiple partitions (slices) in a single file system
• High-speed file system recovery (function equivalent to UFS logging)
• Allocation of continuous blocks by extent-based management
• Extension of file data area in the file system
• Area reallocation in case of disk block failures
• Setting of extent attribute information to a file

The following major UFS file system functions are supported by the GFS Local File System as well:

• 64-bit file system interface
• Direct I/O
• File lock
• quota function
• ACL

The GFS Local File System generally supports UFS file system functions with the exception of the following:

• Use as the root file system, /usr, /var, and /opt
• Setting extended file attributes, which is added in Solaris 9 OE
• Mount specifying non-blocking mandatory locking option, which is added in Solaris 9 OE