Version History
The on-disk layout of VxFS is versioned and upgradeable while the file system is mounted. This file system has gone through seven versions.
- Version 2 added support for filesets, dynamic inode allocation and ACLs. Layouts 1-3 stopped being supported in VxFS 4.0.
- Version 4 added support for storage checkpoints and for Veritas Cluster File System. Version 4 was released in VxFS 3.2.1. Layout version 4 is no longer supported under VxFS 5.1 .
- Version 5 started support for file systems up to 32 terabytes (245 bytes) in size. Individual files can be up to 2 terabytes in size. Version 5 was introduced in VxFS 3.5 and is no longer supported under VxFS 5.1 .
- Version 6 added support for file systems and files up to 8 exabytes (263 bytes) in size. Version 6 also introduced support for named streams/resource forks, for multiple underlying volumes, and for file change logs. Version 6 was introduced in VxFS 4.0.
- Version 7 extends support for multiple volumes to permit Dynamic Storage Tiering. Dynamic Storage Tiering allows root users to move files among different volumes, allocate files to different volumes at file creation time based on policy, and independently recover volumes, without altering the namespace of the file system. Version 7 was introduced in VxFS 5.0
It is assumed that transparent compression and transparent encryption will be addressed in Version 8 or Version 9.
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