Tracking Metadata Changes During Data Copy In A Storage System
First Claim
Patent Images
1. ) A method, comprising:
- using a bitmap and two fences to track changes to metadata while a copy of the metadata is being transferred from a source disk array to a destination disk array.
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Abstract
Embodiments include methods, apparatus, and systems for tracking metadata changes during copying in a storage system. One embodiment includes a method that uses a bitmap and two fences to track changes to metadata while a copy of the metadata is being transferred from a source disk array to a destination disk array.
33 Citations
20 Claims
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1. ) A method, comprising:
using a bitmap and two fences to track changes to metadata while a copy of the metadata is being transferred from a source disk array to a destination disk array. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. ) A tangible computer readable storage medium having instructions for causing a computer to execute a method, comprising:
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generating a bitmap to have a size that is based on a size of available memory in a source storage device; and using the bitmap to track changes to metadata while a copy of the metadata is being transferred from the source storage device to a destination storage device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. ) A disk array, comprising:
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a memory for storing metadata to be transferred; and a controller for generating a bitmap to have a size that is based on a size of the metadata stored in the memory and for using the bitmap to determine when changes occur to the metadata while the metadata is being transferred from the disk array to another disk array. - View Dependent Claims (18, 19, 20)
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Specification