要注意的是,Jigsaw 的 partitioning 和 Qd-tree 以及 PAW(以及其他如 k-d tree R-tree)这种不太一样,对于后两者,每个 partition 会存属于这个区间的所有数据(可以理解为下图中 horizontal layout 的 variant,不管 partition 内具体的 storage model 是行存列存还是 hybrid,对于一行数据而言,其所有 attributes 都...
In this paper, we propose a new framework called a query-data routing tree, or qd-tree, to address this problem, and propose two algorithms for their construction based on greedy and deep reinforcement learning techniques. Experiments over benchmark and real workloads show that a qd-...
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Tree processing apparatus having a knuckle boom mounted at one end on a vehicle. A stick boom is pivotally mounted at one end onto the knuckle boom near its other end. The other end of the stick boom projects past the other end of the knuckle boom and a tree processing head is ...
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