Provided by: libmongoc-doc_1.3.1-1_all 

NAME
mongoc_read_mode_t - Read Preference Modes
SYNOPSIS
typedef enum
{
MONGOC_READ_PRIMARY = (1 << 0),
MONGOC_READ_SECONDARY = (1 << 1),
MONGOC_READ_PRIMARY_PREFERRED = (1 << 2) | MONGOC_READ_PRIMARY,
MONGOC_READ_SECONDARY_PREFERRED = (1 << 2) | MONGOC_READ_SECONDARY,
MONGOC_READ_NEAREST = (1 << 3) | MONGOC_READ_SECONDARY,
} mongoc_read_mode_t;
DESCRIPTION
This enum describes how reads should be dispatched. The default is MONGOC_READ_PRIMARY.
Please see the MongoDB website for a description of Read Preferences \&.
COLOPHON
This page is part of MongoDB C Driver. Please report any bugs at
https://jira.mongodb.org/browse/CDRIVER.
MongoDB C Driver 2016‐01‐18 MONGOC_READ_MODE_T(3)