| 摘要 |
A method for a storage controller to rebalance storage components within a storage tier is provided. The method maintains a linked list for each component, and each component includes a plurality of pages. Each linked list is ordered according to hot and cold pages and includes an identifier for each page. The method calculates a percent range of hot and cold pages for each component, and identifies a fullest and least full component. The method compares a random percent to the hot and cold percent ranges for the fullest component. If the random percent falls within the hot range, the method moves a selected hot page from the fullest component to an empty page in the least full component. If the random percent falls within the cold range, the method moves a selected cold page from the fullest component to an empty page in the least full component.
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