RDDStats (Apache SystemDS 3.3.0 API)

java.lang.Object
- org.apache.sysds.resource.cost.RDDStats

```
public class RDDStats
extends Object
```

Constructor Summary

Constructors
Constructor	Description
`RDDStats(long size, int partitions)`	Initiates RDD statistics object for intermediate variables (not bound to `VarStats`).
`RDDStats(VarStats sourceStats)`	Initiates RDD statistics object bound to an existing `VarStats` object.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

double getCost()
Meant to be used at testing

boolean isCollected()
Meant to be used at testing
- Methods inherited from class java.lang.Object
  equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RDDStats
```
public RDDStats(VarStats sourceStats)
```
    Initiates RDD statistics object bound to an existing VarStats object. Uses HDFS block size to adjust automatically the number of partitions for the current RDD.
    
    Parameters:
    
    sourceStats - bound variables statistics
  - RDDStats
```
public RDDStats(long size,
                int partitions)
```
    Initiates RDD statistics object for intermediate variables (not bound to VarStats). Intended to be used for intermediate shuffle estimations.
    
    Parameters:
    
    size - distributed size of the object
    
    partitions - target number of partitions; -1 for fitting to HDFS block size
- Method Detail
  - getCost
```
public double getCost()
```
    Meant to be used at testing
    
    Returns:
    
    estimated time (seconds) for generation of the current RDD
  - isCollected
```
public boolean isCollected()
```
    Meant to be used at testing
    
    Returns:
    
    flag if the current RDD is collected