Storage data copies with differing compression algorithms

A computer implemented method for managing a storage system with multiple storage devices, for example a redundant array of independent disks (RAID) system, is disclosed. The method comprises analysing compression ratios used for storage blocks written on a first and a second storage device to deter...

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Bibliographic Details
Main Authors Roderick Guy Charles Moore, Paul Nicholas Cashman, Ben Sasson, Lee Jason Sanders
Format Patent
LanguageEnglish
Published 07.08.2024
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A computer implemented method for managing a storage system with multiple storage devices, for example a redundant array of independent disks (RAID) system, is disclosed. The method comprises analysing compression ratios used for storage blocks written on a first and a second storage device to determine a pattern, in response to the pattern determining a first and a second compression ratio, the first compression ratio being different from the second, and writing a storage block to the first storage device with the first compression ratio and to the second storage device with the second compression ratio. The method may determine the spare capacities on the first and second storage devices, and in response to determining that the first spare capacity is greater than the second by a threshold value, writing a storage block to the storage device with the lower spare capacity using the higher compression ratio, and vice versa. The method may also determine that a first and second compression ratio has been used for the most recent Y writes to the first and second storage device respectively and write the next storage block using the opposite compression ratios for the two storage devices.
Bibliography:Application Number: GB20230001423