org.apache.hadoop.hbase.regionserver

Class StoreUtils

java.lang.Object

org.apache.hadoop.hbase.regionserver.StoreUtils

@InterfaceAudience.Private
public final class StoreUtils
extends Object

Utility functions for region server storage layer.

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.conf.Configuration	createStoreConfiguration(org.apache.hadoop.conf.Configuration conf, TableDescriptor td, ColumnFamilyDescriptor cfd)
static int	getBytesPerChecksum(org.apache.hadoop.conf.Configuration conf) Returns the configured bytesPerChecksum value.
static ChecksumType	getChecksumType(org.apache.hadoop.conf.Configuration conf) Returns the configured checksum algorithm.
static OptionalInt	getDeterministicRandomSeed(Collection<HStoreFile> files) Creates a deterministic hash code for store file collection.
static long	getLowestTimestamp(Collection<HStoreFile> candidates) Gets lowest timestamp from candidate StoreFiles
static OptionalLong	getMaxMemStoreTSInList(Collection<HStoreFile> sfs) Return the largest memstoreTS found across all storefiles in the given list.
static OptionalLong	getMaxSequenceIdInList(Collection<HStoreFile> sfs) Return the highest sequence ID found across all storefiles in the given list.
static long	getStorefileFieldSize(HStoreFile file, ToLongFunction<StoreFileReader> f)
static long	getStorefilesSize(Collection<HStoreFile> files, Predicate<HStoreFile> predicate)
static long	getTotalUncompressedBytes(List<HStoreFile> files)
static boolean	hasReferences(Collection<HStoreFile> files) Determines whether any files in the collection are references.
static List<StoreFileInfo>	toStoreFileInfo(Collection<HStoreFile> storefiles)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getDeterministicRandomSeed

public static OptionalInt getDeterministicRandomSeed(Collection<HStoreFile> files)

Creates a deterministic hash code for store file collection.

hasReferences

public static boolean hasReferences(Collection<HStoreFile> files)

Determines whether any files in the collection are references.

Parameters:

files - The files.

getLowestTimestamp

public static long getLowestTimestamp(Collection<HStoreFile> candidates)
                               throws IOException

Gets lowest timestamp from candidate StoreFiles

Throws:

IOException

getMaxMemStoreTSInList

public static OptionalLong getMaxMemStoreTSInList(Collection<HStoreFile> sfs)

Return the largest memstoreTS found across all storefiles in the given list. Store files that were created by a mapreduce bulk load are ignored, as they do not correspond to any specific put operation, and thus do not have a memstoreTS associated with them.

getMaxSequenceIdInList

public static OptionalLong getMaxSequenceIdInList(Collection<HStoreFile> sfs)

Return the highest sequence ID found across all storefiles in the given list.

getChecksumType

public static ChecksumType getChecksumType(org.apache.hadoop.conf.Configuration conf)

Returns the configured checksum algorithm.

Parameters:

conf - The configuration

Returns:

The checksum algorithm that is set in the configuration

getBytesPerChecksum

public static int getBytesPerChecksum(org.apache.hadoop.conf.Configuration conf)

Returns the configured bytesPerChecksum value.

Parameters:

conf - The configuration

Returns:

The bytesPerChecksum that is set in the configuration

createStoreConfiguration

public static org.apache.hadoop.conf.Configuration createStoreConfiguration(org.apache.hadoop.conf.Configuration conf,
                                                                            TableDescriptor td,
                                                                            ColumnFamilyDescriptor cfd)

toStoreFileInfo

public static List<StoreFileInfo> toStoreFileInfo(Collection<HStoreFile> storefiles)

getTotalUncompressedBytes

public static long getTotalUncompressedBytes(List<HStoreFile> files)

getStorefilesSize

public static long getStorefilesSize(Collection<HStoreFile> files,
                                     Predicate<HStoreFile> predicate)

getStorefileFieldSize

public static long getStorefileFieldSize(HStoreFile file,
                                         ToLongFunction<StoreFileReader> f)