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VMAX All Flash & PowerMax:DRR (資料減量率) 低於預期,因為解壓縮的精簡型裝置未指派至 SG。

Summary: 未指派給任何 SG 的 TDEV 將不會啟用壓縮,這會導致資料減量比率低於應達到的比率。

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

資料減量比率很低,而且許多裝置未壓縮。

Cause

根據設計,壓縮功能會在裝置上的儲存群組啟用,而非裝置本身。

如果精簡型裝置未指派至儲存群組,將會保持未壓縮,如果具有大量未壓縮的裝置,便會導致 DRR 比率降低。

Resolution

請客戶將這些 TDEVS 指派至已啟用壓縮功能的儲存群組。

若要檢查 TDEV 是否未指派給任何 SG:symcfg list -sid –sg_compression

若要檢查儲存群組是否啟用壓縮,您可以檢查此命令:symsg -sid list 
根據預設,SG 已啟用壓縮,除非客戶變更其設定。

Affected Products

PowerMax, PowerMaxOS 5978
Article Properties
Article Number: 000192450
Article Type: Solution
Last Modified: 15 Sep 2022
Version:  3
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