Application restrictions of OceanStor 9000 InfoTier

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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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Application scenarios of OceanStor 9000 InfoTier
OceanStor 9000 InfoTier mainly applies to scenarios that require automatic data categorizing and intelligent data management. In scenarios that require automatic data categorizing and intelligent data management, OceanStor 9000 allows data to be automatically stored in different storage media and adjusts data storage locations according to file attributes, improving overall system storage performance and cutting costs.

Application instances of OceanStor 9000 InfoTier
For application instances of OceanStor 9000 InfoTier, see the following feature guides, which cover requirement analysis, application planning, CONFIGURE operations, and verification: - OceanStor 9000 V100R001C01 InfoTier Feature Guide 06 - OceanStor 9000 V100R001C20 InfoTier Feature Guide 01 - OceanStor 9000 V100R001C30 File System Feature Guide 04

Application restrictions of OceanStor 9000 InfoAllocator
A quota can be created only for an empty directory.

Application restrictions of OceanStor 9000 InfoEqualizer
Application restrictions of OceanStor 9000 InfoEqualizer are as follows: - The DNS resolution service of OceanStor 9000 only responds to domain name resolution requests in OceanStor 9000. This service never responds to external domain name resolution requests. - A subnet can be divided into multiple zones, whereas a zone can belong to only one subnet. - A zone can contain multiple nodes, whereas a node can belong to only one zone. - A node can be added to only one subnet, that is, one node can only be accessed by clients on one subnet. - The DNS service IP addresses of subnets cannot be the same as the InfoEqualizer DSN IP address. - Each subnet must belong to different network segments. - A zone must contain at least two nodes for node failover.

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.

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