org.apache.hadoop.hbase.backup

Class HFileArchiver

java.lang.Object

org.apache.hadoop.hbase.backup.HFileArchiver

@InterfaceAudience.Private
public class HFileArchiver
extends Object

Utility class to handle the removal of HFiles (or the respective StoreFiles) for a HRegion from the FileSystem. The hfiles will be archived or deleted, depending on the state of the system.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	HFileArchiver.File Wrapper to handle file operations uniformly
private static class	HFileArchiver.FileablePath A HFileArchiver.File that wraps a simple Path on a FileSystem.
private static class	HFileArchiver.FileableStoreFile HFileArchiver.File adapter for a HStoreFile living on a FileSystem .
private static class	HFileArchiver.FileConverter<T> Adapt a type to match the HFileArchiver.File interface, which is used internally for handling archival/removal of files
private static class	HFileArchiver.FileStatusConverter Convert a FileStatus to something we can manage in the archiving
private static class	HFileArchiver.StoreToFile Convert the HStoreFile into something we can manage in the archive methods

Field Summary

Fields

Modifier and Type	Field and Description
private static int	DEFAULT_RETRIES_NUMBER Number of retries in case of fs operation failure
private static org.apache.hbase.thirdparty.com.google.common.base.Function<HFileArchiver.File,org.apache.hadoop.fs.Path>	FUNC_FILE_TO_PATH
private static org.slf4j.Logger	LOG
private static String	SEPARATOR

Constructor Summary

Constructors

Modifier	Constructor and Description
private	HFileArchiver()

Method Summary

Modifier and Type	Method and Description
static void	archiveFamily(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, RegionInfo parent, org.apache.hadoop.fs.Path tableDir, byte[] family) Remove from the specified region the store files of the specified column family, either by archiving them or outright deletion
static void	archiveFamilyByFamilyDir(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, RegionInfo parent, org.apache.hadoop.fs.Path familyDir, byte[] family) Removes from the specified region the store files of the specified column family, either by archiving them or outright deletion
static void	archiveRegion(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, RegionInfo info) Cleans up all the files for a HRegion by archiving the HFiles to the archive directory
static boolean	archiveRegion(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path rootdir, org.apache.hadoop.fs.Path tableDir, org.apache.hadoop.fs.Path regionDir) Remove an entire region from the table directory via archiving the region's hfiles.
static void	archiveStoreFile(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, RegionInfo regionInfo, org.apache.hadoop.fs.Path tableDir, byte[] family, org.apache.hadoop.fs.Path storeFile) Archive the store file
static void	archiveStoreFiles(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, RegionInfo regionInfo, org.apache.hadoop.fs.Path tableDir, byte[] family, Collection<HStoreFile> compactedFiles) Remove the store files, either by archiving them or outright deletion
private static boolean	deleteRegionWithoutArchiving(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path regionDir) Without regard for backup, delete a region.
private static void	deleteStoreFilesWithoutArchiving(Collection<HStoreFile> compactedFiles) Just do a simple delete of the given store files
static boolean	exists(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, RegionInfo info)
private static List<HFileArchiver.File>	resolveAndArchive(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path baseArchiveDir, Collection<HFileArchiver.File> toArchive, long start) Resolve any conflict with an existing archive file via timestamp-append renaming of the existing file and then archive the passed in files.
private static boolean	resolveAndArchiveFile(org.apache.hadoop.fs.Path archiveDir, HFileArchiver.File currentFile, String archiveStartTime) Attempt to archive the passed in file to the archive directory.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

SEPARATOR

private static final String SEPARATOR

See Also:

Constant Field Values

DEFAULT_RETRIES_NUMBER

private static final int DEFAULT_RETRIES_NUMBER

Number of retries in case of fs operation failure

See Also:

Constant Field Values

FUNC_FILE_TO_PATH

private static final org.apache.hbase.thirdparty.com.google.common.base.Function<HFileArchiver.File,org.apache.hadoop.fs.Path> FUNC_FILE_TO_PATH

Constructor Detail

HFileArchiver

private HFileArchiver()

Method Detail

exists

public static boolean exists(org.apache.hadoop.conf.Configuration conf,
                             org.apache.hadoop.fs.FileSystem fs,
                             RegionInfo info)
                      throws IOException

Returns:

True if the Region exits in the filesystem.

Throws:

IOException

archiveRegion

public static void archiveRegion(org.apache.hadoop.conf.Configuration conf,
                                 org.apache.hadoop.fs.FileSystem fs,
                                 RegionInfo info)
                          throws IOException

Cleans up all the files for a HRegion by archiving the HFiles to the archive directory

Parameters:

conf - the configuration to use

fs - the file system object

info - RegionInfo for region to be deleted

Throws:

IOException

archiveRegion

public static boolean archiveRegion(org.apache.hadoop.fs.FileSystem fs,
                                    org.apache.hadoop.fs.Path rootdir,
                                    org.apache.hadoop.fs.Path tableDir,
                                    org.apache.hadoop.fs.Path regionDir)
                             throws IOException

Remove an entire region from the table directory via archiving the region's hfiles.

Parameters:

fs - FileSystem from which to remove the region

rootdir - Path to the root directory where hbase files are stored (for building the archive path)

tableDir - Path to where the table is being stored (for building the archive path)

regionDir - Path to where a region is being stored (for building the archive path)

Returns:

true if the region was sucessfully deleted. false if the filesystem operations could not complete.

Throws:

IOException - if the request cannot be completed

archiveFamily

public static void archiveFamily(org.apache.hadoop.fs.FileSystem fs,
                                 org.apache.hadoop.conf.Configuration conf,
                                 RegionInfo parent,
                                 org.apache.hadoop.fs.Path tableDir,
                                 byte[] family)
                          throws IOException

Remove from the specified region the store files of the specified column family, either by archiving them or outright deletion

Parameters:

fs - the filesystem where the store files live

conf - Configuration to examine to determine the archive directory

parent - Parent region hosting the store files

tableDir - Path to where the table is being stored (for building the archive path)

family - the family hosting the store files

Throws:

IOException - if the files could not be correctly disposed.

archiveFamilyByFamilyDir

public static void archiveFamilyByFamilyDir(org.apache.hadoop.fs.FileSystem fs,
                                            org.apache.hadoop.conf.Configuration conf,
                                            RegionInfo parent,
                                            org.apache.hadoop.fs.Path familyDir,
                                            byte[] family)
                                     throws IOException

Removes from the specified region the store files of the specified column family, either by archiving them or outright deletion

Parameters:

fs - the filesystem where the store files live

conf - Configuration to examine to determine the archive directory

parent - Parent region hosting the store files

familyDir - Path to where the family is being stored

family - the family hosting the store files

Throws:

IOException - if the files could not be correctly disposed.

archiveStoreFiles

public static void archiveStoreFiles(org.apache.hadoop.conf.Configuration conf,
                                     org.apache.hadoop.fs.FileSystem fs,
                                     RegionInfo regionInfo,
                                     org.apache.hadoop.fs.Path tableDir,
                                     byte[] family,
                                     Collection<HStoreFile> compactedFiles)
                              throws IOException,
                                     FailedArchiveException

Remove the store files, either by archiving them or outright deletion

Parameters:

conf - Configuration to examine to determine the archive directory

fs - the filesystem where the store files live

regionInfo - RegionInfo of the region hosting the store files

family - the family hosting the store files

compactedFiles - files to be disposed of. No further reading of these files should be attempted; otherwise likely to cause an IOException

Throws:

IOException - if the files could not be correctly disposed.

FailedArchiveException

archiveStoreFile

public static void archiveStoreFile(org.apache.hadoop.conf.Configuration conf,
                                    org.apache.hadoop.fs.FileSystem fs,
                                    RegionInfo regionInfo,
                                    org.apache.hadoop.fs.Path tableDir,
                                    byte[] family,
                                    org.apache.hadoop.fs.Path storeFile)
                             throws IOException

Archive the store file

Parameters:

fs - the filesystem where the store files live

regionInfo - region hosting the store files

conf - Configuration to examine to determine the archive directory

tableDir - Path to where the table is being stored (for building the archive path)

family - the family hosting the store files

storeFile - file to be archived

Throws:

IOException - if the files could not be correctly disposed.

resolveAndArchive

private static List<HFileArchiver.File> resolveAndArchive(org.apache.hadoop.fs.FileSystem fs,
                                                          org.apache.hadoop.fs.Path baseArchiveDir,
                                                          Collection<HFileArchiver.File> toArchive,
                                                          long start)
                                                   throws IOException

Resolve any conflict with an existing archive file via timestamp-append renaming of the existing file and then archive the passed in files.

Parameters:

fs - FileSystem on which to archive the files

baseArchiveDir - base archive directory to store the files. If any of the files to archive are directories, will append the name of the directory to the base archive directory name, creating a parallel structure.

toArchive - files/directories that need to be archvied

start - time the archiving started - used for resolving archive conflicts.

Returns:

the list of failed to archive files.

Throws:

IOException - if an unexpected file operation exception occurred

resolveAndArchiveFile

private static boolean resolveAndArchiveFile(org.apache.hadoop.fs.Path archiveDir,
                                             HFileArchiver.File currentFile,
                                             String archiveStartTime)
                                      throws IOException

Attempt to archive the passed in file to the archive directory.

If the same file already exists in the archive, it is moved to a timestamped directory under the archive directory and the new file is put in its place.

Parameters:

archiveDir - Path to the directory that stores the archives of the hfiles

currentFile - Path to the original HFile that will be archived

archiveStartTime - time the archiving started, to resolve naming conflicts

Returns:

true if the file is successfully archived. false if there was a problem, but the operation still completed.

Throws:

IOException - on failure to complete FileSystem operations.

deleteRegionWithoutArchiving

private static boolean deleteRegionWithoutArchiving(org.apache.hadoop.fs.FileSystem fs,
                                                    org.apache.hadoop.fs.Path regionDir)
                                             throws IOException

Without regard for backup, delete a region. Should be used with caution.

Parameters:

regionDir - Path to the region to be deleted.

fs - FileSystem from which to delete the region

Returns:

true on successful deletion, false otherwise

Throws:

IOException - on filesystem operation failure

deleteStoreFilesWithoutArchiving

private static void deleteStoreFilesWithoutArchiving(Collection<HStoreFile> compactedFiles)
                                              throws IOException

Just do a simple delete of the given store files

A best effort is made to delete each of the files, rather than bailing on the first failure.

Parameters:

compactedFiles - store files to delete from the file system.

Throws:

IOException - if a file cannot be deleted. All files will be attempted to deleted before throwing the exception, rather than failing at the first file.