*
     * @param preference provider preference ("auto", "disni", "tcp", etc.)
     * @return best available RDMA provider, or null if none available
     */
    public static RdmaProvider createProvider(String preference) {
        if ("auto".equalsIgnoreCase(preference)) {
            return selectBestProvider();
        }

        switch (preference.toLowerCase()) {
        case "disni":

}
```

## 7. Testing Strategy

### 7.1 Unit Tests
```java
@Test
public void testRdmaProviderSelection() {
    RdmaProvider provider = RdmaProviderFactory.createProvider("auto");
    assertNotNull(provider);
    assertTrue(provider.isAvailable());
}

@Test
public void testRdmaMemoryRegistration() throws Exception {
    RdmaProvider provider = new DisniRdmaProvider();