A multi-wiki, multi-master factory for Wikimedia and similar installations. More...

Inheritance diagram for LBFactoryMulti:

Collaboration diagram for LBFactoryMulti:

Public Member Functions
	__construct ($conf)
	forEachLB ($callback, $params=array())
	Execute a function for each tracked load balancer The callback is called with the load balancer as the first parameter, and $params passed as the subsequent parameters.
	getDBNameAndPrefix ($wiki=false)
	Get the database name and prefix based on the wiki ID.
&	getExternalLB ($cluster, $wiki=false)
	getMainLB ($wiki=false)
	getSectionForWiki ($wiki=false)
	makeServerArray ($template, $loads, $groupLoads)
	Make a server array as expected by LoadBalancer::__construct, using a template and load array.
	newExternalLB ($cluster, $wiki=false)
	newLoadBalancer ($template, $loads, $groupLoads)
	Make a new load balancer object based on template and load array.
	newMainLB ($wiki=false)
	reindexGroupLoads ($groupLoads)
	Take a group load array indexed by group then server, and reindex it by server then group.
	shutdown ()
	Prepare all tracked load balancers for shutdown STUB.
Protected Attributes
array	$conf
	Load balancer factory configuration *.
array	$externalLoads = array()
	A map of external storage cluster name to server load map *.
array	$externalTemplateOverrides
	A set of server info keys overriding serverTemplate for external storage.
LoadBalancer[]	$extLBs = array()
	*
array	$groupLoadsByDB = array()
	A 3-d map giving server load ratios by DB name *.
array	$groupLoadsBySection = array()
	A 3-d map giving server load ratios for each section and group *.
array	$hostsByName = array()
	A map of hostname to IP address *.
string	$lastSection
	*
string	$lastWiki
	*
LoadBalancer[]	$mainLBs = array()
	*
array	$masterTemplateOverrides
	An override array for all master servers *.
	$readOnlyBySection = array()
array	$sectionLoads
	A 2-d map.
array	$sectionsByDB
	A map of database names to section names *.
array	$serverTemplate
	A server info associative array as documented for $wgDBservers.
array	$templateOverridesByCluster
	A 2-d map overriding the server info by external storage cluster *.
array	$templateOverridesByServer
	A 2-d map overriding serverTemplate and externalTemplateOverrides on a server-by-server basis.

Detailed Description

A multi-wiki, multi-master factory for Wikimedia and similar installations.

Ignores the old configuration globals

Configuration: sectionsByDB A map of database names to section names.

sectionLoads A 2-d map. For each section, gives a map of server names to load ratios. For example: array( 'section1' => array( 'db1' => 100, 'db2' => 100 ) )

serverTemplate A server info associative array as documented for $wgDBservers. The host, hostName and load entries will be overridden.

groupLoadsBySection A 3-d map giving server load ratios for each section and group. For example: array( 'section1' => array( 'group1' => array( 'db1' => 100, 'db2' => 100 ) ) )

groupLoadsByDB A 3-d map giving server load ratios by DB name.

hostsByName A map of hostname to IP address.

externalLoads A map of external storage cluster name to server load map.

externalTemplateOverrides A set of server info keys overriding serverTemplate for external storage.

templateOverridesByServer A 2-d map overriding serverTemplate and externalTemplateOverrides on a server-by-server basis. Applies to both core and external storage.

templateOverridesByCluster A 2-d map overriding the server info by external storage cluster.

masterTemplateOverrides An override array for all master servers.

readOnlyBySection A map of section name to read-only message. Missing or false for read/write.

Definition at line 76 of file LBFactoryMulti.php.

Constructor & Destructor Documentation

LBFactoryMulti::__construct ( $ conf )

Parameters:

array $conf

Exceptions:

MWException

Reimplemented from LBFactory.

Definition at line 139 of file LBFactoryMulti.php.

Member Function Documentation

LBFactoryMulti::forEachLB	(	$	callback,
		$	params = `array()`
	)

Execute a function for each tracked load balancer The callback is called with the load balancer as the first parameter, and $params passed as the subsequent parameters.

Parameters:

callable	$callback
array	$params

Reimplemented from LBFactory.

Definition at line 364 of file LBFactoryMulti.php.

References $wgDBname, array(), and global.

LBFactoryMulti::getDBNameAndPrefix ( $ wiki = false )

Get the database name and prefix based on the wiki ID.

Parameters:

bool | string $wiki

Returns:: array

Definition at line 347 of file LBFactoryMulti.php.

References array(), and as.

& LBFactoryMulti::getExternalLB	(	$	cluster,
		$	wiki = `false`
	)

Parameters:

string	$cluster	External storage cluster, or false for core
bool \| string	$wiki	Wiki ID, or false for the current wiki

Returns:: LoadBalancer

Reimplemented from LBFactory.

Definition at line 254 of file LBFactoryMulti.php.

LBFactoryMulti::getMainLB ( $ wiki = false )

Parameters:

bool | string $wiki

Returns:: LoadBalancer

Reimplemented from LBFactory.

Definition at line 216 of file LBFactoryMulti.php.

LBFactoryMulti::getSectionForWiki ( $ wiki = false )

Parameters:

bool | string $wiki

Returns:: string

Definition at line 173 of file LBFactoryMulti.php.

LBFactoryMulti::makeServerArray	(	$	template,
		$	loads,
		$	groupLoads
	)

Make a server array as expected by LoadBalancer::__construct, using a template and load array.

Parameters:

array	$template
array	$loads
array	$groupLoads

Returns:: array

Definition at line 289 of file LBFactoryMulti.php.

LBFactoryMulti::newExternalLB	(	$	cluster,
		$	wiki = `false`
	)

Parameters:

string	$cluster
bool \| string	$wiki

Exceptions:

MWException

Returns:: LoadBalancer

Reimplemented from LBFactory.

Definition at line 234 of file LBFactoryMulti.php.

References $lb, $section, array(), and newMainLB().

LBFactoryMulti::newLoadBalancer	(	$	template,
		$	loads,
		$	groupLoads
	)

Make a new load balancer object based on template and load array.

Parameters:

array	$template
array	$loads
array	$groupLoads

Returns:: LoadBalancer

Definition at line 272 of file LBFactoryMulti.php.

LBFactoryMulti::newMainLB ( $ wiki = false )

Parameters:

bool | string $wiki

Returns:: LoadBalancer

Reimplemented from LBFactory.

Definition at line 193 of file LBFactoryMulti.php.

Referenced by newExternalLB().

LBFactoryMulti::reindexGroupLoads ( $ groupLoads )

Take a group load array indexed by group then server, and reindex it by server then group.

Parameters:

array $groupLoads

Returns:: array

Definition at line 331 of file LBFactoryMulti.php.

LBFactoryMulti::shutdown ( )

Prepare all tracked load balancers for shutdown STUB.

Reimplemented from LBFactory.

Definition at line 373 of file LBFactoryMulti.php.

Member Data Documentation

array LBFactoryMulti::$conf [protected]

Load balancer factory configuration *.

Definition at line 125 of file LBFactoryMulti.php.

array LBFactoryMulti::$externalLoads = array() [protected]

A map of external storage cluster name to server load map *.

Definition at line 100 of file LBFactoryMulti.php.

array LBFactoryMulti::$externalTemplateOverrides [protected]

A set of server info keys overriding serverTemplate for external storage.

Definition at line 105 of file LBFactoryMulti.php.

LoadBalancer [] LBFactoryMulti::$extLBs = array() [protected]

*

Definition at line 129 of file LBFactoryMulti.php.

array LBFactoryMulti::$groupLoadsByDB = array() [protected]

A 3-d map giving server load ratios by DB name *.

Definition at line 96 of file LBFactoryMulti.php.

array LBFactoryMulti::$groupLoadsBySection = array() [protected]

A 3-d map giving server load ratios for each section and group *.

Definition at line 94 of file LBFactoryMulti.php.

array LBFactoryMulti::$hostsByName = array() [protected]

A map of hostname to IP address *.

Definition at line 98 of file LBFactoryMulti.php.

string LBFactoryMulti::$lastSection [protected]

*

Definition at line 133 of file LBFactoryMulti.php.

string LBFactoryMulti::$lastWiki [protected]

*

Definition at line 131 of file LBFactoryMulti.php.

LoadBalancer [] LBFactoryMulti::$mainLBs = array() [protected]

*

Definition at line 127 of file LBFactoryMulti.php.

array LBFactoryMulti::$masterTemplateOverrides [protected]

An override array for all master servers *.

Definition at line 115 of file LBFactoryMulti.php.

LBFactoryMulti::$readOnlyBySection = array() [protected]

Definition at line 121 of file LBFactoryMulti.php.

array LBFactoryMulti::$sectionLoads [protected]

A 2-d map.

For each section, gives a map of server names to load ratios

Definition at line 84 of file LBFactoryMulti.php.

array LBFactoryMulti::$sectionsByDB [protected]

A map of database names to section names *.

Definition at line 79 of file LBFactoryMulti.php.

array LBFactoryMulti::$serverTemplate [protected]

A server info associative array as documented for $wgDBservers.

The host, hostName and load entries will be overridden

Definition at line 90 of file LBFactoryMulti.php.

array LBFactoryMulti::$templateOverridesByCluster [protected]

A 2-d map overriding the server info by external storage cluster *.

Definition at line 113 of file LBFactoryMulti.php.

array LBFactoryMulti::$templateOverridesByServer [protected]

A 2-d map overriding serverTemplate and externalTemplateOverrides on a server-by-server basis.

Applies to both core and external storage

Definition at line 111 of file LBFactoryMulti.php.

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

includes/db/LBFactoryMulti.php

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation