MongoDB
PHP Manual

MongoDB::setReadPreference

(PECL mongo >=1.3.0)

MongoDB::setReadPreferenceSet the read preference for this database

Opis

public bool MongoDB::setReadPreference ( int $read_preference [, array $tags ] )

Parametry

read_preference

The read preference mode: Mongo::RP_PRIMARY, Mongo::RP_PRIMARY_PREFERRED, Mongo::RP_SECONDARY, Mongo::RP_SECONDARY_PREFERRED, or Mongo::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.

Zwracane wartości

Returns TRUE on success, or FALSE otherwise.

Przykłady

Przykład #1 MongoDB::setReadPreference() tag set array syntax example

<?php

$m 
= new MongoClient();
$db $m->test;

// Prefer the nearest server in the "east" data center also used for reporting,
// but fall back to a server in the "west" data center
$db->setReadPreference(MongoClient::RP_NEAREST, array(
    array(
'dc' => 'east''use' => 'reporting'),
    array(
'dc' => 'west'),
));

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