| Name | Description | Type | Package | Framework |
| CountSyncPolicy | SyncPolicy implementation that will trigger a file system sync after a certain number of tuples | Class | org.apache.storm.hdfs.trident.sync | Apache Storm |
| SyncPolicy | Interface for controlling when the HdfsBolt syncs and flushes the filesystem. | Interface | org.apache.storm.hdfs.trident.sync | Apache Storm |