Features
|
Description
|
Quick I/O for databases
|
The Quick I/O for Databases feature, using clusterized Oracle Disk Manager (ODM), is supported on SFCFS. Quick I/O is licensable only through Veritas Database Editions products.
|
Storage Checkpoints
|
Storage Checkpoints are supported on cluster file systems, but are licensed only with other Veritas products.
|
Snapshots
|
Snapshots are supported on cluster file systems.
|
Quotas
|
Quotas are supported on cluster file systems.
|
NFS mounts
|
You can mount cluster file systems to NFS.
|
Nested Mounts
|
You can use a directory on a cluster mounted file system as a mount point for a local file system or another cluster file system.
|
Freeze and thaw
|
Synchronizing operations, which require freezing and thawing file systems, are done on a cluster-wide basis.
|
Memory mapping
|
Shared memory mapping established by the mmap () function is supported on SFCFS.
See the mmap (2) manual page.
|
Disk layout versions
|
SFCFS supports only disk layout Version 6 and 7. Cluster mounted file systems can be upgraded, a local mounted file system can be upgraded, unmounted, and mounted again as part of a cluster. Use the fstyp -v special_device command to ascertain the disk layout version of a VxFS file system. Use the vxupgrade command to update the disk layout version.
|
Locking
|
Advisory file and record locking are supported on SFCFS. For the F_GETLK command, if there is a process holding a conflicting lock, the l_pid field returns the process ID of the process holding the conflicting lock. The nodeid-to-node name translation can be done by examining the /etc/llthosts file or with the fsclustadm command. Mandatory locking, and deadlock detection supported by traditional fcntl locks, are not supported on SFCFS.
See the fcntl (2) manual page.
|