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SmartTier Feature Guide for Block

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5300 V5, 5500 V5, 5600 V5, 5800 V5, 6800 V5, 18500 V5, and 18800 V5. This document describes the working principle and application scenarios of the SmartTier (for block) feature. It also explains how to configure and manage the feature.
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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).


This section describes the background, definition, and benefits of SmartTier.


Each type of storage media displays its unique advantages and disadvantages in performance and cost:

  • SSDs feature a short response time, a low per-I/O cost, but a high per-GB cost.
  • NL-SAS disks have a long response time, a high per-I/O cost, but a low per-GB cost.
  • SAS disks fall in between SSDs and NL-SAS disks in performance and cost.


SmartTier, an intelligent data storage tiering feature developed by Huawei manages data storage intelligently, calculates the activity level of data, and determines the appropriate tier for the data. It improves the performance of storage systems and minimizes TCO.


The SmartTier relocates data with higher activity rates to high-performance tiers (such as SSDs), and relocates data with lower activity rates to more cost-effective tiers (such as NL-SAS disks). It provides hot data a fast response and high input/output operations per second (IOPS). The overall storage system performance is aggressively improved as a result.

The data statistics, analysis, and relocation executed by the SmartTier are based on the SmartTier policy and performance requirements of applications. The SmartTier still keeps the required service continuity and data availability during the previous actions.

Updated: 2019-07-11

Document ID: EDOC1000181474

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