PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Solaris(TM) 10 Operating System)

1.8.2.1 Functions not provided by the GFS Shared File System

The GFS Shared File System explained in this guide does not provide the following functions:

• Use as a root file system, /usr, /var, /opt
• To use as a mount point
• For Solaris 10 OS, GFS Shared File Systems are used in a non-global zone
• quota function
• ACL function
• Asynchronous I/O function
• File sharing with other nodes by an NFS
• Use of IPv6
• Setting of hard link for a directory
• Direct I/O function
• lockfs(1M)
• Setup of an extension file attribute that is added on Solaris 9 OS
• Mounting with the non-blocking mandatory lock added on Solaris 9 OS
• Execution of fssnap(1M) that is added on Solaris 9 OS
• Execution of write atomicity when the following commands are executed from the other node to the file where a writing operation is being executed with write(2), writev(2), or pwrite(2). The file size is I/O that exceeds the logical block size (8 kilobytes).
  • write(2), writev(2), pwrite(2)
  • truncate(3c), ftruncate(3c)
  • creat(2), open(2) with O_TRUNC
• Execution of open(2) from the other node to the file where mmap(2) is being executed with MAP_SHARED and PROT_WRITE specified.
• Execution of mmap(2) from the other node to the file where open(2) is being executed with MAP_SHARED and PROT_WRITE specified.
• Execution of open(2) from the other node to the writable file where mmap(2) is being executed.
• Execution of mmap(2) from the other node to the writable file where open(2) is being executed.
• Advisory lock setup to the file where the recommended mandatory lock is set, and changes to the mandatory lock setting of the file where mmap(2) is being executed.
• If mmap(2) is being executed to the file where the mandatory lock is set, EAGAIN is returned to the F_UNLCK request with fcntl(2). If the file is being recovered, the command is terminated normally.
• As for the type except the following file type, creation of a file and use of a file are not possible.
  • Normal
  • Directory
  • Symbolic link
• Execution of read(2) to the directory
• Specification of F_SHARE and F_UNSHARE in the ONC shared lock (fcntl(2))
• Analysis of the "sfcfs" module through the Dtrace dynamic trace function that is added in Solaris 10 OS.