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Repartition

repartition.Rd

The following options for repartition are possible:

  • 1. Return a new SparkDataFrame that has exactly numPartitions.

  • 2. Return a new SparkDataFrame hash partitioned by the given columns into numPartitions.

  • 3. Return a new SparkDataFrame hash partitioned by the given column(s), using spark.sql.shuffle.partitions as number of partitions.

Usage

repartition(x, ...)

# S4 method for class 'SparkDataFrame'
repartition(x, numPartitions = NULL, col = NULL, ...)

Arguments

x

a SparkDataFrame.

...

additional column(s) to be used in the partitioning.

numPartitions

the number of partitions to use.

col

the column by which the partitioning will be performed.

Note

repartition since 1.4.0

See also

coalesce, repartitionByRange

Other SparkDataFrame functions: SparkDataFrame-class, agg(), alias(), arrange(), as.data.frame(), attach,SparkDataFrame-method, broadcast(), cache(), checkpoint(), coalesce(), collect(), colnames(), coltypes(), createOrReplaceTempView(), crossJoin(), cube(), dapply(), dapplyCollect(), describe(), dim(), distinct(), drop(), dropDuplicates(), dropna(), dtypes(), except(), exceptAll(), explain(), filter(), first(), gapply(), gapplyCollect(), getNumPartitions(), group_by(), head(), hint(), histogram(), insertInto(), intersect(), intersectAll(), isLocal(), isStreaming(), join(), limit(), localCheckpoint(), merge(), mutate(), ncol(), nrow(), persist(), printSchema(), randomSplit(), rbind(), rename(), repartitionByRange(), rollup(), sample(), saveAsTable(), schema(), select(), selectExpr(), show(), showDF(), storageLevel(), str(), subset(), summary(), take(), toJSON(), union(), unionAll(), unionByName(), unpersist(), unpivot(), with(), withColumn(), withWatermark(), write.df(), write.jdbc(), write.json(), write.orc(), write.parquet(), write.stream(), write.text()

Examples

if (FALSE) { # \dontrun{
sparkR.session()
path <- "path/to/file.json"
df <- read.json(path)
newDF <- repartition(df, 2L)
newDF <- repartition(df, numPartitions = 2L)
newDF <- repartition(df, col = df$"col1", df$"col2")
newDF <- repartition(df, 3L, col = df$"col1", df$"col2")
} # }