MongoCollection::setReadPreference
(PECL mongo >=1.3.0)
MongoCollection::setReadPreference — Set the read preference for this collection
Descrição
public MongoCollection::setReadPreference
( string
$read_preference
[, array $tags
] ) : boolParâmetros
-
read_preference -
The read preference mode:
MongoClient::RP_PRIMARY,MongoClient::RP_PRIMARY_PREFERRED,MongoClient::RP_SECONDARY,MongoClient::RP_SECONDARY_PREFERRED, ouMongoClient::RP_NEAREST. -
tags -
An array of zero or more tag sets, where each tag set is itself an array of criteria used to match tags on replica set members.
Valor Retornado
Returns TRUE on success, or FALSE otherwise.
Erros
Emits E_WARNING if either parameter is invalid, or if one or more tag sets are provided with the MongoClient::RP_PRIMARY read preference mode.
Exemplos
Exemplo #1 MongoCollection::setReadPreference() tag set array syntax example
<?php
$m = new MongoClient();
$c = $m->test->users;
// Prefer the nearest server in the "east" data center also used for reporting,
// but fall back to a server in the "west" data center
$c->setReadPreference(MongoClient::RP_NEAREST, array(
array('dc' => 'east', 'use' => 'reporting'),
array('dc' => 'west'),
));
?>
Veja Também
- The read preferences documentation.
- MongoCollection::getReadPreference() - Get the read preference for this collection
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