Technical Overview
VxFS Functionality on Cluster File Systems
VxFS Functionality on Cluster File Systems
The HP Serviceguard Storage Management Suite uses the Veritas File System (VxFS). Most of the major features of VxFS local file systems are available on cluster file systems, including:
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•Fast recovery from system crashes using the intent log to track recent file system metadata updates
•Online administration that allows file systems to be extended and defragmented while they are in use
Supported Features
The following table lists the features and commands that are available and supported with CFS. Every VxFS online manual page has a Cluster File System Issues section that informs you if the command functions on
Table | CFS Supported Features | |
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| Features and Commands Supported on CFS |
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| Quick I/O | The clusterized Oracle Disk Manager (ODM) is supported with CFS |
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| using the Quick I/O for Databases feature in the following HP |
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| Serviceguard Storage Management Suite CFS bundles for Oracle: |
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| For |
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| For |
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| T8696CB, and T8697CB |
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| Storage | Storage Checkpoints are supported with CFS. |
| Checkpoints |
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| Freeze and | Synchronizing operations, which require freezing and thawing file |
| Thaw | systems, are done on a |
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| Snapshots | Snapshots are supported with CFS. |
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| Quotas | Quotas are supported with CFS. |
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| NFS Mounts | You can mount cluster file systems to NFS. |
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| Memory | Shared memory mapping established by the map() function is |
| Mapping | supported on CFS. See the mmap(2) manual page. |
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| Concurrent | This feature extends current support for concurrent I/O to cluster file |
| I/O | systems. Semantics for concurrent read/write access on a file in a |
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| cluster file system matches those for a local mount. |
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| Delaylog | The |
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| This is the default state for CFS. |
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Chapter 1 | 9 |