OceanStor 9000 metadata functions

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Metadata is a type of data that defines data, describes data properties, and supports functions of indicating storage locations and historical data, querying resources, and recording files. In a file system, the relationship between metadata and file data is similar to that between a control plane and a data plane.

Other related questions:
Whether the SSD configured on each node of OceanStor 9000 is used for storing metadata
SSDs are configured on OceanStor 9000 to store small files.

Functions of restriping in OceanStor 9000
Through restriping, data is stored based on file pool policies.

Computing data distribution for OceanStor 9000
Data distribution for OceanStor 9000 is computed by CA using the HASH algorithm based on the FID of a file and the offset and length of the current operation.

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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