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OceanStor 9000 V300R006C00 File System Feature Guide 12

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This section introduces InfoTier in terms of the application restrictions, and interaction with other features.

Application Restrictions

Restrictions on nodes and node pools:

  • A node cannot be directly migrated from one node pool to another. If you want to change the node pool of a node, delete the node from its original node pool, and then add it into another node pool by expansion.
  • A node pool belongs to one storage tier. The system creates a default storage tier for a new node pool, and you can use DeviceManager to affiliate this pool to another storage tier.
  • You cannot delete a node pool containing nodes or a storage tier containing node pools. If you want to delete the node pool or storage tier, you must empty it first.
  • If a node cannot be added to any existing node pool, create a node pool and add at least three nodes of the same type (including P12, P12E, P25, P25E, P36, P36E, C36, C36E nodes) or two C72 nodes to the node pool.

Restrictions on restriping:

  • Popularity statistics are performed based on files. The object of restriping is an entire file.
  • During restriping, ensure that data reliability is not impaired and the redundancy ratio remains unchanged.
  • If a file has not finished restriping, the file cannot be restriped to other storage tiers or node pools.

Interaction with Other Features

Data encryption and data migration cannot be simultaneously enabled.

Updated: 2019-06-27

Document ID: EDOC1000122519

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