QiangCai commented on a change in pull request #3912:
URL: https://github.com/apache/carbondata/pull/3912#discussion_r510558896
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File path:
integration/spark/src/main/scala/org/apache/carbondata/spark/load/DataLoadProcessBuilderOnSpark.scala
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@@ -143,10 +143,18 @@ object DataLoadProcessBuilderOnSpark {
var numPartitions = CarbonDataProcessorUtil.getGlobalSortPartitions(
configuration.getDataLoadProperty(CarbonCommonConstants.LOAD_GLOBAL_SORT_PARTITIONS))
- if (numPartitions <= 0) {
- numPartitions = convertRDD.partitions.length
+
+ // if numPartitions user does not specify and not specified in config then
dynamically calculate
+ if (numPartitions == 0) {
+ // get the size in bytes and convert to size in MB
+ val sizeOfDataFrame = SizeEstimator.estimate(inputRDD)/1000000
+ // data frame size can not be more than Int size
+ numPartitions = sizeOfDataFrame.toInt/inputRDD.getNumPartitions
Review comment:
it should be numberOfParitions = totalSize/partitionSize
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