Storage system with elective garbage collection to reduce flash contention
First Claim
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1. A method for elective garbage collection in storage memory, performed by a storage system, comprising:
- monitoring storage space available in each of a plurality of portions of storage memory of a storage system;
detecting an imbalance in the storage space available across the plurality of portions of storage memory; and
selecting between a RAID rebuild and a garbage collection move to perform for data migration, based on the detecting, wherein both the RAID rebuild and the garbage collection move are configurable to stripe data across each of the plurality of portions of storage memory.
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Abstract
A method for elective garbage collection in storage memory, performed by a storage system is provided. The method includes monitoring storage space available in each of a plurality of portions of storage memory of a storage system and detecting an imbalance in the storage space available across the plurality of portions of storage memory. The method includes performing garbage collection to rebalance the space available across the plurality of portions of storage memory, responsive to the detecting. A storage system is also provided.
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20 Claims
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1. A method for elective garbage collection in storage memory, performed by a storage system, comprising:
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monitoring storage space available in each of a plurality of portions of storage memory of a storage system; detecting an imbalance in the storage space available across the plurality of portions of storage memory; and selecting between a RAID rebuild and a garbage collection move to perform for data migration, based on the detecting, wherein both the RAID rebuild and the garbage collection move are configurable to stripe data across each of the plurality of portions of storage memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tangible, non-transitory, computer-readable media having instructions thereupon which, when executed by a processor, cause the processor to perform a method comprising:
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determining, for each of a plurality of portions of storage memory of a storage system, storage space available; detecting that storage space available across the plurality of portions of storage memory has an imbalance; and selecting between a RAID rebuild and a garbage collection move to perform for data migration, based on the detecting, wherein both the RAID rebuild and the garbage collection move are configurable to stripe data across each of the plurality of portions of storage memory. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A storage system, comprising:
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one or more processors; a plurality of portions of storage memory; a storage space detector, configurable to track storage space available in each of the plurality of portions of storage memory and configurable to select between one of RAID rebuild and a garbage collection move to perform for data migration, based on the tracked storage space available; and a garbage collection module, configurable to perform garbage collection so as to rebalance the storage space available across the plurality of portions of storage memory, responsive to identifying an imbalance across the plurality of portions of storage memory based on results from the storage space detector, wherein both the RAID rebuild and the garbage collection move are configurable to stripe data across each of the plurality of portions of storage memory. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification