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Full Discussion: Limit Number of files
Top Forums UNIX for Dummies Questions & Answers Limit Number of files Post 302674709 by bakunin on Friday 20th of July 2012 08:21:00 AM
Old 07-20-2012
When you format the file system you can configure the number of inodes (more specifically the space set aside for these). Usually there are defaults used which fit most cases, but with some special circumstances (if you know that the FS will have to hold exceptionally many small or few large files) it makes sense to override these defaults.

Typical use is for FSes intended for database files: these are usually very few and very large files, so formatting for very few inodes makes sense and reduces the filesystem overhead somewhat.

I hope this helps.

bakunin
 

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EXTUNDELETE(1)						      General Commands Manual						    EXTUNDELETE(1)

NAME
extundelete - utility to undelete files from an ext3 or ext4 partition. SYNOPSIS
extundelete [options] device-file... DESCRIPTION
extundelete is a utility that can recover deleted files from an ext3 or ext4 partition extundelete uses the information stored in the partition's journal to attempt to recover a file that has been deleted from the partition. There is no guarantee that any particular file will be able to be undeleted, so always try to have a good backup system in place, or at least put one in place after recovering your files! OPTIONS
--version Prints the version number of extundelete. --help Print a brief usage summary for extundelete. Partition name Name of the partition that has deleted files, such as /dev/sda3. Could also be the file name of a copy of the partition, such as that made with dd. --superblock Prints information about the filesystem from the superblock. --journal --superblock Prints information about the journal from the journal's superblock. --inode # Prints the information from the inode number of the filesystem given, such as "--inode 2". --block # Prints the contents of the block, called as "--block 9652". --restore-file path/to/deleted/file Attempts to restore the file which was deleted at the given filename, called as "--restore-file dirname/filename". --restore-inode # Used to restore inodes by number, called as "--restore-inode 2569". Also accepts a list of inodes separated by only commas, such as "--restore-inode 2569,5692,6925". --restore-files filename Restores a list of files. First, construct a list of files in the same style as would be used in the --restore-file option, and save it to the file "filename". Then, this option may be used to attempt to restore those files with a single call to extundelete. This form also reduces redundancy from multiple calls parsing the journal multiple times. --output-dir path/to/dump/recovered/files Restores files in the output dir 'path'. By default the restored files are created under current directory 'RECOVERED_FILES' --restore-all Restores all files possible to undelete to their names before deletion, when possible. Other files are restored to a filename like "file.NNNN". --restore-directory path/of/directory Restores all files possible to link to specified directory to their names before deletion, when possible. -j journal_dev Specifies the device that is the external journal of the file system. -b block_number Specifies the block number of the backup superblock to be used when opening the file system. -B block_size Specifies the block size of the partition to be used when opening the file system. --before date Only restore files deleted before the date specified, which should be in the form of the number of seconds since the UNIX epoch. Use a shell command like $ date -d "Aug 1 9:02" +%s to convert a human-readable date to the proper format. The conversion from the number of seconds to a readable format may be found by using either of the following: $ date -d@1234567890 $ perl -le "print scalar localtime 1234567890" --after date Only restore files deleted after the date specified, which should be in the form of the number of seconds since the UNIX epoch. See the notes for the --before option for more information. AUTHOR
extundelete was written by Nic Case <number9652@users.sourceforge.net> Copyright (C) 2009, 2010 This manual page was written by Elias Alejandro Ano Mendoza <ealmdz@gmail.com>, for the Debian project (and may be used by others). September 29, 2010 EXTUNDELETE(1)
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