import java.util.Arrays; import java.util.Random; public class ParallelSortExample { public static void main(String[] args) { int[] values = new Random().ints(10, 1, 100).toArray(); System.out.println("Before s
the chapter explains how threads can communicate via shared memory. It then discusses in depth how to use divide-and-conquer recursive parallelism to perform a basic reduction—namely, summing the elements of an array. It then generalizes this discussion to other reductions ...
FIGURE 3. Array processor. A processor array consists of a number of processing elements (PEs) linked by a network with regular topology. Each processing element has its own memory to store local data. As in a conventional machine, it is important that an array processor implementation supports...
There are a few ways to speed-up sorting with p/sort:Vector inputs are preferable than sequences. Shave additional milliseconds by using the raw array output, by enclosing p/sort in a binding like (binding [p/*mutable* true] (p/sort coll)). p/sort returns an object array in this ...
server contains a value for theenamecolumn betweenAandG, that row gets sent to the firstORDERBYparallel execution server. When the scan operation is complete, the sorting processes can return the sorted results to the coordinator, which, in turn, returns the complete query results to the user...
multi-threadingA central problem in software engineering applied to large databases is External Sorting. Here we discuss an algorithm implemented with Java, using it's multi-threading capability. It is shown that the parallel version is about ten percent faster.Marcelo A. Bittencourt...
Parallel and signal processing patterns for large-scale radio data applications have been captured with a new domain-specific language (DSL), OptiSDR. The
Particularly, GBC can accomplish the sorting directly in 4 GB of mem- ory, while the BCFtools may need large external disk space (Additional file 2: Fig. S1). Zhang et al. Genome Biology (2023) 24:76 Page 8 of 22 For instance, BCFTools cannot sort larger datasets (e.g., ...
In (3), we show that preliminary infrastructure tuning results in sorting 1TB data in 14 minutes on 10 Power 730 machines running IBM InfoSphere BigInsights. Further improvement is expected, among other factors, on the new IBM PowerLinuxTM 7R2 systems. By: Anne E. Gattiker, Fadi H. ...
Complexity of the ROBIN initialization method is 𝑂(𝑁𝑙𝑜𝑔𝑁)O(NlogN) as it is dominated by repeated sorting of the dataset at each new centroid definition. Such a computational cost can be a problem in very large datasets. Anyway, the ROBIN method can be preferable to other in...