Comparatively, Huawei OceanStor Dorado V6 series all-flash storage systems use solid-state drives (SSDs), take ROW snapshots, and offer high random read/write performance capabilities that is, the OceanStor Dorado V6 series storage systems eliminate the necessity for both the data backup process and the sequential read operations done in legacy storage snapshots, thereby delivering lossless storage read/write performance. Legacy storage systems use hard disk drives (HDDs) and take COW snapshots, which introduce a data pre-copy process resulting in a storage write performance penalty. ![]() ROW snapshots do not copy data during a write operation, but frequently overwrite data, causing the data discretely scattered in the source LUN and consequently affecting the sequential read performance.This data copy will affect the storage write performance. The following table lists the product models that support HyperSnap. COW snapshots copy data during the initial data write. This document describes Huawei's snapshot feature (HyperSnap) and provides an overview of its configuration, management, and usage scenarios.Snapshot can be implemented using the copy-on-write (COW) or redirect-on-write (ROW) technology: Like taking a photo, taking a snapshot is to instantaneously make a point-in-time copy of the target application state, enabling zero-backup-window data backup and thereby meeting enterprises' high business continuity and data reliability requirements. Snapshot is one of these data backup technologies. To address these backup issues, numerous data backup and protection technologies, characterized by a short or even zero backup window, have been developed. A backup window is the optimal time to perform a backup without seriously affecting application operations.įacing exponential data growth, enterprises' system administrators must shorten the backup window.For example, if a service could handle an RPO of 20 minutes, it would be able to experience a disaster, lose 20 minutes of data, and still be able to work normally. ![]()
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