#include <kvstore.h>

kv_error_t 
kv_config_add_read_zone(kv_config_t *config, 
                        const char *read_zone); 

Adds a zone in which nodes must be located if they are to be used for read operations. If this function has not been called, then read operations can be performed on nodes in any zone.

The specified zone must exist at the time that this configuration is used to open a store handle, or KV_INVALID_ARGUMENT is returned when you attempt to open the handle.

Zones specified for read operations can include primary and secondary zones. If the master is not located in any of the specified zones, either because the zones are all secondary zones or because the master node is not currently in one of the specified primary zones, then read operations configured for absolute consistency will fail.