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Veritas File System performance enhancements

Traditional file systems employ block-based allocation schemes that provide adequate random access and latency for small files, but which limit throughput for larger files. As a result, they are less than optimal for commercial environments.

VxFS addresses this file system performance issue through an alternative allocation method and increased user control over allocation, I/O, and caching policies.

See Using and modifying the Veritas File System.

VxFS provides the following performance enhancements:

• Data synchronous I/O
• Direct I/O and discovered direct I/O
• Enhanced I/O performance
• Caching advisories
• Enhanced directory features
• Explicit file alignment, extent size, and preallocation controls
• Tunable I/O parameters
• Tunable indirect data extent size
• Integration with Veritas Volume Manager^™ (VxVM^®)
• Support for large directories

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    Note   VxFS reduces the file lookup time in directories with an extreme large number of files

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See VxFS performance: creating, mounting, and tuning File Systems.