Table: Veritas File System features in cluster file systems describes the VxFS supported features and commands for SFCFSHA.
Table: Veritas File System features in cluster file systems
Features |
Description |
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Compression |
Compressing files reduces the space used by files, while retaining the accessibility of the files and being transparent to applications. |
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Deduplication |
You can perform post-process periodic deduplication in a file system to eliminate duplicate data without any continuous cost. |
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Defragmentation |
Free resources are initially aligned and allocated to files in an order that provides optimal performance. See Defragmentation. |
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Disk layout versions |
SFCFSHA supports only disk layout Version 7, 8 and 9. Use the fstyp -v special_device command to ascertain the disk layout version of a VxFS file system. Use the vxupgrade command for to upgrade a mounted file system to disk layout Version 7 or later. Use the vxfsconvert command to upgrade an unmounted file system from disk layout Version 4 to disk layout Version 7 or later.
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Fast file system recovery |
VxFS provides fast recovery of a file system from system failure. |
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File replication |
You can perform cost-effective periodic replication of data over IP networks, giving organizations an extremely flexibile storage independent data availability solution for disaster recovery and off-host processing. |
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FileSnap |
A FileSnap is a space-optimized copy of a file in the same name space, stored in the same file system. See About FileSnaps. |
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Freeze and thaw |
Synchronizing operations, which require freezing and thawing file systems, are done on a cluster-wide basis. |
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Locking |
Advisory file and record locking are supported on SFCFSHA. 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 |
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Memory mapping |
Shared memory mapping established by the mmap() function is supported on SFCFSHA. |
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NFS mounts |
You export the NFS file systems from the Cluster. You can NFS export CFS file systems in a distributed highly available way. |
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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. |
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Quotas |
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Snapshots |
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Storage Checkpoints |
Storage Checkpoints are supported on cluster file systems, but are licensed only with other Veritas products. |
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