PowerFlex Max compression ratio
Summary: The max compression ratio is an attribute of a fine-granularity storage pool, its default value is 10.
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Instructions
Symptom
The "compression ratio" is higher than "Max compression ratio."
Explanation
The Max compression ratio is a limit on how much user data can be stored in the entire storage pool.
maximum_user_data = storage_pool_raw_capacity * max_compression_ratio
The "compression ratio" on the other hand, is a ratio of the currently stored user data over the used physical capacity. This depends on the compressibility of the user data under the compressing algorithm employed.
The Max compression ratio is not the same as the "Oversubscription rate."
The oversubscription rate determines the total capacity of thin volumes which can be created from a particular storage pool, based on its raw capacity. Not all thin capacity can be filled with data.
Affected Products
PowerFlex SoftwareProducts
PowerFlex rack, PowerFlex ApplianceArticle Properties
Article Number: 000182225
Article Type: How To
Last Modified: 29 Apr 2025
Version: 3
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