---
name: "mongoc_read_mode_t"
section: "3"
platform: "linux"
package: "libmongoc-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mongoc_read_mode_t"
---

# mongoc\_read\_mode\_t(3)

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*.

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.