首先,自己设置RDD的并行度,有两种方式:要不然,在parallelize()、textFile()等方法中,传入第二个参数,设置RDD的task / partition的数量;要不然,用SparkConf.set()方法,设置一个参数,spark.default.parallelism,可以统一设置这个application所有RDD的partition数量。 其次,在程序中将RDD cache到内存中,调用RDD.cache()方...
-- BI strategy is used when the requirement is to spend less time in split generation as opposed to query execution (split generation does not read or cache file footers). -- ETL strategy is used when spending little more time in split generation is acceptable (split generation reads and ca...
#size-cells = <1>; boot_partition: partition@0 { label = "mcuboot"; reg = <0x00000000 0x10000>; }; slot0_partition: partition@10000 { label = "image-0"; }; slot0_ns_partition: partition@50000 { label = "image-0-nonsecure"; }; slot1_partition: partition@80000 { label = "im...
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props,newHashSet<>(Arrays.asList(topic.split(","))); } Driver$.MODULE$.foreach(dStream.dstream(), KafkaOffsetManagerImpl.get());returnresult; } 开发者ID:streamsets,项目名称:datacollector,代码行数:44,代码来源:SparkStreamingBinding.java 示例...
return deltaSize; } 代码示例来源:origin: twosigma/beakerx public void taskStart(int stageId, long taskId) { if (!stages.containsKey(stageId)) { logger.warning(String.format("Spark stage %d could not be found for task progress reporting.", stageId)); return; } removeTask(stageId, taskId...