一種改進(jìn)的數(shù)據(jù)庫Sharding方法
[Abstract]:Sharding is a horizontal extension solution for open source databases, which consists of two main steps: logical partitioning and physical mapping. For the former, the existing mechanism is usually based on Range or Hash based on Shard Key. However, the method based on Range can not guarantee the equilibrium of data range, and the method based on Hash is not suitable for range query, and can not guarantee the balance of data when Shard Key is not uniform. For the latter, the existing mechanism usually uses consistent hash to ensure the dynamic expansion of storage nodes. However, the method does not consider the data equalization mechanism when the data increase or decrease results in the change of Chunk size. Therefore, a new load balancing Sharding method is proposed. On the one hand, considering the advantages and disadvantages of the above two partitioning methods, a new logic partition method is proposed. On the other hand, a mechanism for dealing with the imbalance caused by the change of Chunk size is given. Experiments show that the proposed method can effectively ensure the load balance of the data.
【作者單位】: 東北大學(xué)計(jì)算機(jī)科學(xué)與工程學(xué)院;東北大學(xué)軟件學(xué)院;
【基金】:國家自然科學(xué)基金項(xiàng)目(612020888)資助 中央高;究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)基金項(xiàng)目(100704001)資助 教育部高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金項(xiàng)目(20120042110028)資助
【分類號】:TP311.13
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