org.apache.drill.exec.planner.cost

Interface PluginCost

public interface PluginCost

PluginCost describes the cost factors to be used when costing for the specific storage/format plugin

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	PluginCost.CheckValid<T> An interface to check if a parameter provided by user is valid or not.
static class	PluginCost.greaterThanEquals Class which checks whether the provided parameter value is greater than or equals to a minimum limit.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	logger

Method Summary

Modifier and Type	Method and Description
int	getAverageColumnSize(GroupScan scan)
int	getBlockSize(GroupScan scan)
int	getRandomBlockReadCost(GroupScan scan)
int	getSequentialBlockReadCost(GroupScan scan)

Field Detail

logger

static final org.slf4j.Logger logger

Method Detail

getAverageColumnSize

int getAverageColumnSize(GroupScan scan)

Returns:

the average column size in bytes

getBlockSize

int getBlockSize(GroupScan scan)

Returns:

the block size in bytes

getSequentialBlockReadCost

int getSequentialBlockReadCost(GroupScan scan)

Returns:

the sequential block read cost

getRandomBlockReadCost

int getRandomBlockReadCost(GroupScan scan)

Returns:

the random block read cost