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OceanStor 9000 V300R005C00 File System Feature Guide 11

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Specifications

Specifications

This section provides the specifications of the InfoStamper feature.

For details, see Table 5-2.

Table 5-2  Specifications of the InfoStamper

Item

Description

Number of snapshots

A maximum of 2048 snapshots can be created for one directory, including those that a user has run a deletion command to delete but are not deleted. The OceanStor 9000 supports a maximum of 8192 snapshots.

Snapshot frequency

Snapshots are created at an interval of 1 second.

Snapshot granularity

Snapshots can be created for any directory but the root directory.

Snapshot nesting is not supported. If snapshots have been created for a directory, no snapshots can be created for the parent directory and subdirectories of the directory.

Snapshot policy

Manual snapshot, periodic snapshot (by day, week, or month)

A maximum of six snapshot policies can be configured for a single directory.

Snapshot deletion

Snapshots can be manually deleted. In addition, expired snapshots can be automatically deleted.

Snapshot data generation approaches

Metadata Copy On Write (COW), data Redirect On Write (ROW)

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Updated: 2019-03-30

Document ID: EDOC1000101823

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