split pointMapReduceThe explosive growth of Data is bringing more and more challenges and opportunities to data mining. In data mining, learning decision tree is a common method, in which determining split point
The hive.mapreduce.per.task.max.splits parameter can be used to limit the maximum number of maps of Hive tasks on the server to prevent performance problems caused by Hiv
Splittable compression formats are especially suitable for MapReduce; see Compression and Input Splits for further discussion. Codecs A codec is the implementation of a compression-decompression algorithm. In Hadoop, a codec is represented by an implementation of the CompressionCodec interface. So, ...
This alarm indicates that the ZNodes capacity usage in the HBase service has exceeded the threshold. If this alarm is not handled in a timely manner, the problem severity may be escalated toCritical, affecting data writing. Possible Causes DR is configured for HBase, and data synchronization fa...
mapreduce.input.fileinputformat.split.minsizeandmapreduce.input.fileinputformat.split.maxsize The above two parameters can be tuned to decide the workload of a mapper within a range. Tuning this range results in a corresponding change in the number of mappers being allocated for ...
Pagh, R., Tsourakakis, C.E.: Colorful triangle counting and a mapreduce implementation. Inf. Process. Lett.112 MathSciNetGoogle Scholar Palmer, C.R., Gibbons, P.B., Faloutsos, C.: Anf: a fast and scalable tool for data mining in massive graphs. In: KDD (2002) ...
In order to map the cleaned reads to the O. xanthornus reference genome, we used the BWA-MEM algorithm (V0.7.17; Li 2013). Then, we used SAMtools (V0.1.19; Li et al. 2009) to (i) convert the SAM files into BAM format, (ii) remove reads that did not pair properly with the...
Tea is an important global beverage crop and is largely clonally propagated. Despite previous studies on the species, its genetic and evolutionary history deserves further research. Here, we present a haplotype-resolved assembly of an Oolong tea cultivar
In 60 seconds here are the... Date: 02/16/2012 Fan-out Querying for Federations in SQL Azure (Part 2): Scalable Fan-out Queries with TOP, ORDER BY, DISTINCT and Other Powerful Aggregates, MapReduce Style! Welcome back. In the previous post: Introduction to Fan-out Querying, we ...
val femaleData:RDD[(String,Int)] = data.map{line => val t= line.split(',') (t(0),t(2).toInt) }.reduceByKey(_ + _) // Filter the information about female netizens who spend more than 2 hours online, and export the results. val result = femaleData.filter(line => line._2...