Whether OceanStor 9000 InfoTier affects system upgrades

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Before upgrading the system, stop all InfoTier background tasks.

Other related questions:
Does InfoTier Affect System Upgrade?
Before upgrading the system, stop all InfoTier background tasks, including the tasks of scanning for stored data and restriping data.

OceanStor 9000 InfoTier feature definition
InfoTier, which is also named dynamic storage tiering (DST), can store files on storage devices with different performance levels according to the file properties, and can migrate files between devices. In this way, InfoTier fits users' requirements on the files processing speed and storage capacity, and ensures optimized space utilization, enhanced access performance, and reduced total deployment cost.

Whether the OceanStor 9000 InfoTier feature requires a license
InforTier is an optional feature of OceanStor 9000. A license is required for this feature. If the license is unavailable, an administrator cannot set file pool policies and therefore the OceanStor 9000 will only be able to manage storage tier CONFIGURE but not automatically migrate files.

Specifications of the OceanStor 9000 InfoTier feature
Specifications of the OceanStor 9000 InfoTier feature: Maximum number of storage tiers: 32 Maximum number of node pools: 32 Maximum number of DiskPool: 96 Maximum time range of collecting I/O read-write popularity and count (days): 7 Maximum number of file pool policies: 128

Application restrictions of OceanStor 9000 InfoTier
Application restrictions of OceanStor 9000 InfoTier include: - 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 the node to 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. - Popularity statistics are performed based on files. - During restriping or file MIGRATE, ensure that data reliability is not impaired and the redundancy ratio remains unchanged.

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