PHP 7.0.6 Released

    The MongoDB\Driver\ReadPreference class

    (mongodb >=1.0.0)

    Introduction

    Class synopsis

    final MongoDB\Driver\ReadPreference {
    /* Constants */
    const integer RP_PRIMARY = 1 ;
    const integer RP_PRIMARY_PREFERRED = 5 ;
    const integer RP_SECONDARY = 2 ;
    const integer RP_SECONDARY_PREFERRED = 6 ;
    const integer RP_NEAREST = 10 ;
    /* Methods */
    final public __construct ( string $mode [, array $tagSets ] )
    final public integer getMode ( void )
    final public array getTagSets ( void )
    }

    Predefined Constants

    MongoDB\Driver\ReadPreference::RP_PRIMARY

    All operations read from the current replica set primary. This is the default read preference for MongoDB.

    MongoDB\Driver\ReadPreference::RP_PRIMARY_PREFERRED

    In most situations, operations read from the primary but if it is unavailable, operations read from secondary members.

    MongoDB\Driver\ReadPreference::RP_SECONDARY

    All operations read from the secondary members of the replica set.

    MongoDB\Driver\ReadPreference::RP_SECONDARY_PREFERRED

    In most situations, operations read from secondary members but if no secondary members are available, operations read from the primary.

    MongoDB\Driver\ReadPreference::RP_NEAREST

    Operations read from member of the replica set with the least network latency, irrespective of the member's type.

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