DateTieredStoreEngine (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.regionserver.StoreEngine<DefaultStoreFlusher,DateTieredCompactionPolicy,DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>
- - org.apache.hadoop.hbase.regionserver.DateTieredStoreEngine

```
@InterfaceAudience.Private
public class DateTieredStoreEngine
extends StoreEngine<DefaultStoreFlusher,DateTieredCompactionPolicy,DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>
```
HBASE-15400 This store engine allows us to store data in date tiered layout with exponential sizing so that the more recent data has more granularity. Time-range scan will perform the best with most recent data. When data reach maxAge, they are compacted in fixed-size time windows for TTL and archiving. Please refer to design spec for more details. https://docs.google.com/document/d/1_AmlNb2N8Us1xICsTeGDLKIqL6T-oHoRLZ323MG_uy8/edit#heading=h.uk6y5pd3oqgx

Field Summary
- Fields inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine
  compactionPolicy, compactor, STORE_ENGINE_CLASS_KEY, storeFileManager, storeFlusher

Constructor Summary

Constructors
Constructor and Description

DateTieredStoreEngine()

Constructors
Constructor and Description
`DateTieredStoreEngine()`

Method Summary

Methods
Modifier and Type	Method and Description
`CompactionContext`	`createCompaction()` Creates an instance of a compaction context specific to this engine.
`protected void`	`createComponents(org.apache.hadoop.conf.Configuration conf, Store store, KeyValue.KVComparator kvComparator)` Create the StoreEngine's components.
`boolean`	`needsCompaction(List<StoreFile> filesCompacting)`

Methods inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine
create, getCompactionPolicy, getCompactor, getStoreFileManager, getStoreFlusher

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DateTieredStoreEngine
```
public DateTieredStoreEngine()
```
- Method Detail
  - needsCompaction
```
public boolean needsCompaction(List<StoreFile> filesCompacting)
```
    Specified by:
    
    needsCompaction in class StoreEngine<DefaultStoreFlusher,DateTieredCompactionPolicy,DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>
    
    Parameters:
    filesCompacting - Files currently compacting
    
    Returns:
    whether a compaction selection is possible
  - createCompaction
```
public CompactionContext createCompaction()
                                   throws IOException
```
    Description copied from class: StoreEngine
    
    Creates an instance of a compaction context specific to this engine. Doesn't actually select or start a compaction. See CompactionContext class comment.
    
    Specified by:
    
    createCompaction in class StoreEngine<DefaultStoreFlusher,DateTieredCompactionPolicy,DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>
    
    Returns:
    New CompactionContext object.
    
    Throws:
    
    IOException
  - createComponents
```
protected void createComponents(org.apache.hadoop.conf.Configuration conf,
                    Store store,
                    KeyValue.KVComparator kvComparator)
                         throws IOException
```
    Description copied from class: StoreEngine
    
    Create the StoreEngine's components.
    
    Specified by:
    
    createComponents in class StoreEngine<DefaultStoreFlusher,DateTieredCompactionPolicy,DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>
    
    Throws:
    
    IOException

Class DateTieredStoreEngine

Field Summary

Fields inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine

Constructor Summary

Method Summary

Methods inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine

Methods inherited from class java.lang.Object

Constructor Detail

DateTieredStoreEngine

Method Detail

needsCompaction

createCompaction

createComponents