pro.fessional.mirana.io

Class DirHasher

java.lang.Object

pro.fessional.mirana.io.DirHasher

public class DirHasher
extends Object

ext3 has a limit of 32000 directories, ext4 removes this limit. The max number of files in a single directory on ext3 and ext4 is not limited to the specified number but to the number of inode in the file system.

Since:

2020-12-25

Author:

trydofor

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_FILE

Constructor Summary

Constructors

Constructor and Description
DirHasher()

Method Summary

Modifier and Type	Method and Description
static @NotNull File	mkdirs(File root) use the serial started from milliseconds as fileId to separate subdirectories.
static @NotNull File	mkdirs(File root, long fileId) Separate subdirectories by fileId (serial, mills)
static @NotNull String	mkdirs(long fileId) Separate subdirectories by fileId (serial, mills)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_FILE

public static final int MAX_FILE

See Also:

Constant Field Values

Constructor Detail

DirHasher

public DirHasher()

Method Detail

mkdirs

@NotNull
public static @NotNull File mkdirs(File root)

use the serial started from milliseconds as fileId to separate subdirectories. Note that multiple jvm may create the same root directory.

mkdirs

@NotNull
public static @NotNull File mkdirs(File root,
                                            long fileId)

Separate subdirectories by fileId (serial, mills)

mkdirs

@NotNull
public static @NotNull String mkdirs(long fileId)

Separate subdirectories by fileId (serial, mills)