# mongoc_index_opt_t

## Synopsis

    #include <mongoc.h>

    typedef struct
    {
       bool                        is_initialized;
       bool                        background;
       bool                        unique;
       const char                 *name;
       bool                        drop_dups;
       bool                        sparse;
       int32_t                     expire_after_seconds;
       int32_t                     v;
       const bson_t               *weights;
       const char                 *default_language;
       const char                 *language_override;
       mongoc_index_opt_geo_t     *geo_options;
       mongoc_index_opt_storage_t *storage_options;
       void                       *padding[6];
    } mongoc_index_opt_t;

## Description

This structure contains the options that may be used for tuning a specific index.

NOTE: dropDups is deprecated as of MongoDB version 2.7.5. This option is silently ignored by the server and unique index builds using this option will fail if a duplicate value is detected.