Adaptive grouping in object raid

Inactive Publication Date: 2005-05-26
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mirror method is also relatively expensive as the overhead effectively doubles the cost of storing the data.
However, the parity method has lower performance and availability characteristics in comparison to the mirror method.
The extra copies result in greater overhead and greater cost than schemes that store only one redundant data copy.
For small virtual objects, however, the

Method used

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  • Adaptive grouping in object raid
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  • Adaptive grouping in object raid

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Embodiment Construction

[0027] The invention and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the invention. The examples used herein are intended merely to facilitate an understanding of ways in which the invention may be practiced and to further enable those of skill in the art to practice the invention. Accordingly, the examples should not be construed as limiting the scope of the invention.

[0028] As previously mentioned, there is a need for a new data migration technique, which increases data storage space efficiency for variable-sized objects of data being stored redundantly. Referring now to the drawings, and more particula

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Abstract

A method and system for data redundancy, wherein method comprises storing an object in an object storage device, storing a duplicate of the object in a second object storage device, converting the object into any of a grouped object Redundant Array of Independent Disks (RAID) layout and an individual RAID layout upon growth of the object, and discarding the duplicate object. The step of converting further comprises determining which of the grouped object RAID or individual RAID layout to convert the object into based on a size of the object being converted. Moreover, the step of converting into a grouped object RAID layout further comprises selecting a group based on whether the group comprises other objects similarly sized to the object, wherein the similarly sized objects comprise variably sized objects.

Description

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Claims

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Application Information

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Owner IBM CORP
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