Hazy_Sgd< T > Class Template Reference

This class handles all queries sent by triggers It uses locks for public functions to handle parallelism. More...

#include <hazy_sgd.h>

Inheritance diagram for Hazy_Sgd< T >:

List of all members.

Public Member Functions
	Hazy_Sgd (Storage_Manager< T > *sm, IncrementalSGD< T > *sgd, Skiing &ski, hazy_model::strategy s)
	Constructor for Hazy that uses default model and requires Storage Manager.
void	updateModel (T vec, sClass label)
	Updates model with given example and updates external results accordingly.
void	deleteModel (std::string db_name, std::string table_name)
void	readEntityClass (key entity_id, sClass &c)
	Gets entity id and gives class of entity.
void	readEntityClass (T vec, sClass &label)
	Gets feature vector of the entity and gives class of the entity.
void	readEntityClass (T vec, double eps, sClass &label)
	Gets feature vector and eps of the entity and gives class of the entity.
void	readNumInClass (sClass c, int &nClass)
	Gives the # of entities that belong to the given class c.
Protected Types
typedef std::map< std::string, Hazy_Database * >	_connection_map
Protected Member Functions
void	updateModel ()
	According to the strategy, updates storage manager.
void	holder_difference_models (double &delta_w, double &delta_b)
	Calculates differences between models.
void	update_low_high_water ()
	Calculates low & high water values.
Protected Attributes
int	_dim
Skiing	ski
	Skiing object that maintains low & high water, acc cost and resort cost.
IncrementalSGD< T > *	sgd
	Sgd model which is maintained.
hazy_model	hm
	Keeps track of the hazy model Kept up-to-date by SGD code (so needs to be initialized after) Also contains the low and high water values.
Storage_Manager< T > *	st_man
	Storage manager object that updates related storages for entities.
pthread_rwlock_t	_rwlock
	Fine-grained read-write lock.
model	_last_sort_model
	The model that the entities are clustered on.
_connection_map	connections
bool	_high_low_water_valid
	LAZY_HAZY flags if (_high_low_water_valid) then the high and the low water in the model are valid the model will become invalidated on a lazy_hazy update.

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Detailed Description

template<class T>
class Hazy_Sgd< T >

This class handles all queries sent by triggers It uses locks for public functions to handle parallelism.

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Member Typedef Documentation

template<class T>

typedef std::map<std::string, Hazy_Database*> Hazy_Sgd< T >::_connection_map [protected]

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Constructor & Destructor Documentation

template<class T>

Hazy_Sgd< T >::Hazy_Sgd	(	Storage_Manager< T > *	sm,
		IncrementalSGD< T > *	sgd,
		Skiing &	ski,
		hazy_model::strategy	s
	)

Constructor for Hazy that uses default model and requires Storage Manager.

Parameters:

[in]	sm	storage manager used in hazy sgd
[in]	sgd	sgd model
[in]	ski	skiing object that contains information about skiing strategy
[in]	s	strategy which is either LAZY_NAIVE, LAZY_HAZY, EAGER_NAIVE, EAGER_HAZY

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Member Function Documentation

template<class T>

void Hazy_Sgd< T >::deleteModel	(	std::string	db_name,
		std::string	table_name
	)

template<class T>

void Hazy_Sgd< T >::holder_difference_models	(	double &	delta_w,
		double &	delta_b
	)			[protected]

Calculates differences between models.

Parameters:

[out]	delta_w	the difference between feature vector of the model from last sort and feature vector of the current model
[out]	delta_b	the difference between bias of the model from last sort and bias of the current model

template<class T>

void Hazy_Sgd< T >::readEntityClass	(	T	vec,
		double	eps,
		sClass &	label
	)

Gets feature vector and eps of the entity and gives class of the entity.

Used for lazy hazy reads on on-disk

Parameters:

[in]	vec	feature vector of the entity
[in]	eps	epsilon value of the entity
[out]	label	class of the entity

template<class T>

void Hazy_Sgd< T >::readEntityClass	(	T	vec,
		sClass &	label
	)

Gets feature vector of the entity and gives class of the entity.

Used for lazy naive reads on on-disk

Parameters:

[in]	vec	feature vector of the entity
[out]	label	class of the entity

template<class T>

void Hazy_Sgd< T >::readEntityClass	(	key	entity_id,
		sClass &	c
	)

Gets entity id and gives class of entity.

Parameters:

[in]	entity_id	id of the entity
[out]	c	class of the entity

template<class T>

void Hazy_Sgd< T >::readNumInClass	(	sClass	c,
		int &	nClass
	)

Gives the # of entities that belong to the given class c.

Parameters:

[in]	c	class that we are looking for
[out]	nClass	number of entities that belong to class c

template<class T>

void Hazy_Sgd< T >::update_low_high_water

(

)

[inline, protected]

Calculates low & high water values.

template<class T>

void Hazy_Sgd< T >::updateModel	(	T	vec,
		sClass	label
	)

Updates model with given example and updates external results accordingly.

Parameters:

[in]	vec	feature vector of given example
[in]	label	class of given example

template<class T>

void Hazy_Sgd< T >::updateModel

(

)

[protected]

According to the strategy, updates storage manager.

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Member Data Documentation

template<class T>

int Hazy_Sgd< T >::_dim [protected]

template<class T>

bool Hazy_Sgd< T >::_high_low_water_valid [protected]

LAZY_HAZY flags if (_high_low_water_valid) then the high and the low water in the model are valid the model will become invalidated on a lazy_hazy update.

if the model is invalid on a lazy_hazy read, then the high and low water need to be recomputed.

template<class T>

struct model Hazy_Sgd< T >::_last_sort_model [protected]

The model that the entities are clustered on.

template<class T>

pthread_rwlock_t Hazy_Sgd< T >::_rwlock [protected]

Fine-grained read-write lock.

template<class T>

_connection_map Hazy_Sgd< T >::connections [protected]

template<class T>

struct hazy_model Hazy_Sgd< T >::hm [protected]

Keeps track of the hazy model Kept up-to-date by SGD code (so needs to be initialized after) Also contains the low and high water values.

template<class T>

IncrementalSGD<T>* Hazy_Sgd< T >::sgd [protected]

Sgd model which is maintained.

template<class T>

Skiing Hazy_Sgd< T >::ski [protected]

Skiing object that maintains low & high water, acc cost and resort cost.

template<class T>

Storage_Manager<T>* Hazy_Sgd< T >::st_man [protected]

Storage manager object that updates related storages for entities.

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The documentation for this class was generated from the following files:

• hazy_sgd.h
• hazy_sgd.hxx

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