* A multi-database, multi-master factory for Wikimedia and similar installations.
* Ignores the old configuration globals.
*
- * Template override precedence (highest => lowest):
- * - templateOverridesByServer
- * - masterTemplateOverrides
- * - templateOverridesBySection/templateOverridesByCluster
- * - externalTemplateOverrides
- * - serverTemplate
- * Overrides only work on top level keys (so nested values will not be merged).
- *
- * 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:
- * [
- * 'section1' => [
- * '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:
- * [
- * 'section1' => [
- * 'group1' => [
- * '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.
- * templateOverridesBySection A 2-d map overriding the server info by section.
- * templateOverridesByCluster A 2-d map overriding the server info by external storage cluster.
- *
- * masterTemplateOverrides An override array for all master servers.
- *
- * loadMonitorClass Name of the LoadMonitor class to always use.
- *
- * readOnlyBySection A map of section name to read-only message.
- * Missing or false for read/write.
- *
* @ingroup Database
*/
class LBFactoryMulti extends LBFactory {
*/
private $readOnlyBySection = [];
- // Other stuff
-
/** @var array Load balancer factory configuration */
private $conf;
private $lastSection;
/**
- * @param array $conf
- * @throws InvalidArgumentException
+ * @see LBFactory::__construct()
+ *
+ * Template override precedence (highest => lowest):
+ * - templateOverridesByServer
+ * - masterTemplateOverrides
+ * - templateOverridesBySection/templateOverridesByCluster
+ * - externalTemplateOverrides
+ * - serverTemplate
+ * Overrides only work on top level keys (so nested values will not be merged).
+ *
+ * Server configuration maps should be of the format Database::factory() requires.
+ * Additionally, a 'max lag' key should also be set on server maps, indicating how stale the
+ * data can be before the load balancer tries to avoid using it. The map can have 'is static'
+ * set to disable blocking replication sync checks (intended for archive servers with
+ * unchanging data).
+ *
+ * @param array $conf Parameters of LBFactory::__construct() as well as:
+ * - sectionsByDB Map of database names to section names.
+ * - sectionLoads 2-d map. For each section, gives a map of server names to
+ * load ratios. For example:
+ * [
+ * 'section1' => [
+ * 'db1' => 100,
+ * 'db2' => 100
+ * ]
+ * ]
+ * - serverTemplate Server configuration map intended for Database::factory().
+ * Note that "host", "hostName" and "load" entries will be
+ * overridden by "sectionLoads" and "hostsByName".
+ * - groupLoadsBySection 3-d map giving server load ratios for each section/group.
+ * For example:
+ * [
+ * 'section1' => [
+ * 'group1' => [
+ * 'db1' => 100,
+ * 'db2' => 100
+ * ]
+ * ]
+ * ]
+ * - groupLoadsByDB 3-d map giving server load ratios by DB name.
+ * - hostsByName Map of hostname to IP address.
+ * - externalLoads Map of external storage cluster name to server load map.
+ * - externalTemplateOverrides Set of server configuration maps overriding
+ * "serverTemplate" for external storage.
+ * - templateOverridesByServer 2-d map overriding "serverTemplate" and
+ * "externalTemplateOverrides" on a server-by-server basis.
+ * Applies to both core and external storage.
+ * - templateOverridesBySection 2-d map overriding the server configuration maps by section.
+ * - templateOverridesByCluster 2-d map overriding the server configuration maps by external
+ * storage cluster.
+ * - masterTemplateOverrides Server configuration map overrides for all master servers.
+ * - loadMonitorClass Name of the LoadMonitor class to always use.
+ * - readOnlyBySection A map of section name to read-only message.
+ * Missing or false for read/write.
*/
public function __construct( array $conf ) {
parent::__construct( $conf );
* @throws InvalidArgumentException
* @return LoadBalancer
*/
- protected function newExternalLB( $cluster, $domain = false ) {
+ public function newExternalLB( $cluster, $domain = false ) {
if ( !isset( $this->externalLoads[$cluster] ) ) {
throw new InvalidArgumentException( __METHOD__ . ": Unknown cluster \"$cluster\"" );
}
}
$serverInfo['hostName'] = $serverName;
$serverInfo['load'] = $load;
- $serverInfo += [ 'flags' => DBO_DEFAULT ];
+ $serverInfo += [ 'flags' => IDatabase::DBO_DEFAULT ];
$servers[] = $serverInfo;
}
dépôts / lhc / web / wiklou.git / blobdiff