XVM volume management is integrated in SGI InfiniteStorage Filesystem XFS™. XFS is the native file system for SGI® systems, from desktop workstations to supercomputers. Fully embraced by the open source community, XFS provides full 64-bit file capabilities and easily scales from gigabytes to exabytes to handle extremely large files. The XFS file system integrates volume management, the guaranteed rate I/O, and journaling technology for fast, reliable recovery. File systems can be backed up while still in use, significantly reducing administrative overhead.
| Topic |
Specifications |
| Topology Support |
- Mirroring, striping, concatenation supported.
- Each volume can contain 3 subvolumes: real-time, log, and data
- File system journal can be stored on a separate partition for maximum performance
- Separate real-time partition for XFSfilesystems.
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| Maximum Disks per File System |
- Each sub volume can be independently mirrored up to 4 copies, striped up to 128 ways, and concatenated up to 100 volume extents (note: there may be hardware imposed limits)
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| Root Partition |
- Root partitions can be mirrored. Striping and device concatenation of root partitions is not supported at first release /usr partition mirroring, striping, and concatenation are available for the /usr partitions as for any other (non-root) file system
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| Dynamic Change |
- Add or remove a mirror, grow a volume, replace failed elements of a mirrored volume
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| XLV Options |
- File system mirroring. Striping and concatenation are provided with base software
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