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PHP Manual :: The MongoDB\Driver\ReadConcern class



MongoDB\Driver\ReadPreference::getTagSets || MongoDB\Driver\ReadConcern::__construct || MongoDB\Driver || PHP Manual

(mongodb >=1.1.0)

MongoDB\Driver\ReadConcern controls the level of isolation for read operations for replica sets and replica set shards. This option requires the WiredTiger storage engine and MongoDB 3.2 or later.

final MongoDB\Driver\ReadConcern {
/* Constants */
const string LOCAL = local ;
const string MAJORITY = majority ;
/* Methods */
final public __construct ([ string $level ] )
final public string|null getLevel ( void )
}
MongoDB\Driver\ReadConcern::LOCAL

Queries using this read concern will return the node's most recent copy of the data. This provides no guarantee that the data has been written to a majority of the nodes (i.e. it may be rolled back).

This is the default read concern level.

MongoDB\Driver\ReadConcern::MAJORITY

Queries using this read concern will return the node's most recent copy of the data confirmed as having been written to a majority of the nodes (i.e. the data cannot be rolled back).



MongoDB\Driver\ReadPreference::getTagSets || MongoDB\Driver\ReadConcern::__construct || MongoDB\Driver || PHP Manual
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