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What is the difference between “dentry” and “inode table” in Linux FS?

What is a Superblock, Inode, Dentry and a File?Do memory-backed filesystems (like sysfs and procfs) have superblock and inode table?Fastest way to get list of all file sizesWhat is the difference between “inode size” and “Bytes per inode”Are there two inode tables used in locating the inode of a file in ext2?What is the association of an inode with a file?Is the inode table held in memory?big data + what is the right filesystem ext4 or xfs?How do inode numbers from ls -i relate to inodes on disk

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

-1

Are dentries and inode table same thing?
If not what is the purpose of each and where are they stored?
How does the filesystem exactly work specifically "ext4" or "xfs"?

linux filesystems ext4 inode xfs

share|improve this question

edited 11 hours ago

Rohan Hasabnis

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Possible duplicate of What is a Superblock, Inode, Dentry and a File?
  
  – Bart
  15 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No. I understand the difference between inode and dentry. Want to know the diff between "dentry" and "inode table"
  
  – Rohan Hasabnis
  15 hours ago
  

  
  
  
  

add a comment | 

-1

Are dentries and inode table same thing?
If not what is the purpose of each and where are they stored?
How does the filesystem exactly work specifically "ext4" or "xfs"?

linux filesystems ext4 inode xfs

share|improve this question

edited 11 hours ago

Rohan Hasabnis

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Possible duplicate of What is a Superblock, Inode, Dentry and a File?
  
  – Bart
  15 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No. I understand the difference between inode and dentry. Want to know the diff between "dentry" and "inode table"
  
  – Rohan Hasabnis
  15 hours ago
  

  
  
  
  

add a comment | 

Are dentries and inode table same thing?
If not what is the purpose of each and where are they stored?
How does the filesystem exactly work specifically "ext4" or "xfs"?

linux filesystems ext4 inode xfs

share|improve this question

edited 11 hours ago

Rohan Hasabnis

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

share|improve this question

edited 11 hours ago

Rohan Hasabnis

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

share|improve this question

edited 11 hours ago

Rohan Hasabnis

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

asked 16 hours ago

Rohan HasabnisRohan Hasabnis

1544 bronze badges

1 Answer
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The inode table is simply the data structure that contains all the inodes. On ext4, it's a linear table, split among the block groups (with a constant number of inodes per block group).

There isn't much connection between the inode table(s) and dentries than what the already is between dentries and the inodes themselves.

The question about how the filesystems work is much too broad to answer here. There's a description of the ext4 filesystem format here: https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout

There's probably some description of XFS online too, but I don't particularly know of any good resources.

share|improve this answer

answered 10 hours ago

ilkkachuilkkachu

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The inode table is simply the data structure that contains all the inodes. On ext4, it's a linear table, split among the block groups (with a constant number of inodes per block group).

There isn't much connection between the inode table(s) and dentries than what the already is between dentries and the inodes themselves.

The question about how the filesystems work is much too broad to answer here. There's a description of the ext4 filesystem format here: https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout

There's probably some description of XFS online too, but I don't particularly know of any good resources.

share|improve this answer

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges

add a comment | 

0

The inode table is simply the data structure that contains all the inodes. On ext4, it's a linear table, split among the block groups (with a constant number of inodes per block group).

There isn't much connection between the inode table(s) and dentries than what the already is between dentries and the inodes themselves.

The question about how the filesystems work is much too broad to answer here. There's a description of the ext4 filesystem format here: https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout

There's probably some description of XFS online too, but I don't particularly know of any good resources.

share|improve this answer

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges

add a comment | 

The inode table is simply the data structure that contains all the inodes. On ext4, it's a linear table, split among the block groups (with a constant number of inodes per block group).

There isn't much connection between the inode table(s) and dentries than what the already is between dentries and the inodes themselves.

The question about how the filesystems work is much too broad to answer here. There's a description of the ext4 filesystem format here: https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout

There's probably some description of XFS online too, but I don't particularly know of any good resources.

share|improve this answer

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges

share|improve this answer

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges

answered 10 hours ago

ilkkachuilkkachu

66.9k1010 gold badges111111 silver badges193193 bronze badges