The GFS Shared File System explained in this guide does not provide the following functions:
Use as a root file system, /usr, /var, /opt
Use as a mount point
quota function
ACL function
Asynchronous I/O function
File sharing with other nodes by an NFS
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
Mounting with the non-blocking mandatory lock added on Solaris 9
Execution of fssnap(1M) that is added on Solaris 9
Guaranteeing the atomicity of the write for the following operations from other nodes, when data written by write(2), writev(2), pwrite(2) is stored in several blocks.
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
Use as a swap file
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.
The GFS Shared File System explained in this guide does not provide the following functions which were provided by the GFS Shared File System before 4.2A00 on Solaris 9 of PRIMEPOWER.
Two or more communication paths set up from AC to MDS(multiple LAN setup)
Separation of update log area from representative partition
Uninterrupted operation when MDS process is downed
MDS failback
Addition of meta data partition to file system
Addition of file data partition to mounted file system
Addition of shared node to mounted file system
High speed backup and restoration utilizing PRIMECLUSTER Global Disk Services Snapshot
File Extension Attribute Information
