DbEnv::rep_set_nsites()
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## DbEnv::rep_set_nsites()

    #include <db_cxx.h>

    int
    DbEnv::rep_set_nsites(u_int32_t nsites);

The `DbEnv::rep_set_nsites()` method specifies the total number of sites in a replication group.

The `DbEnv::rep_set_nsites()` method is typically called by Replication Manager applications. (However, see also the DbEnv::rep_elect() method nsites parameter.)

The database environment's replication subsystem may also be configured using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "rep_set_nsites", one or more whitespace characters, and the number of sites specified. For example, "rep_set_nsites 5" sets the number of sites to 5. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

The `DbEnv::rep_set_nsites()` method configures a database environment, not only operations performed using the specified DbEnv handle.

If master leases are in use, the `DbEnv::rep_set_nsites()` method may not be called after the DbEnv::rep_start() or DbEnv::repmgr_start() methods are called. If master leases are not in use, the `DbEnv::rep_set_nsites()` method may be called at any time during the life of the application.

The `DbEnv::rep_set_nsites()` method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

### Parameters

#### nsites

An integer specifying the total number of sites in the replication group.

### Errors

The `DbEnv::rep_set_nsites()` method may fail and throw a DbException exception, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

#### EINVAL

If master leases are in use and replication has already been started; or if an invalid flag value or parameter was specified.

### Class

DbEnv

### See Also

Replication and Related Methods

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