Object database

Learn blob, tree and commit objects.

What Is the Git Object Database?

Git stores file contents and history information in its object database. This database is located in .git/objects. Git objects are identified by hash values based on their contents; objects with identical content can have the same identity.

.git/objects/
├── 1a/
├── 4f/
└── info/

Objects are usually stored in compressed form and read by Git when needed.

Blob, Tree, and Commit Objects

A blob object stores file content, while a tree object represents directory structure and links between filenames and objects. A commit object contains a reference to a tree, author and date information, a commit message, and links to parent commits when present.

Commit
  └── Tree
       ├── Blob (index.html)
       └── Blob (style.css)

This structure allows Git to reconstruct a project's file tree and history at a particular point in time.

Exercise Find the Object ID of File Content

Calculate the hash of a file's content without writing it to the Git object database. Do not use the -w option with hash-object; the goal is only to display the object ID.

Test yourself

Which object type stores the raw content of a file in Git's object database?
- Tree
- Commit
- Ref
- Blob
Show answer

Blob — A blob object stores file content; it does not independently store the filename or directory structure.

The Object That Represents Directory Structure

Blob dosya içeriğini saklar. Dizin yapısını ve dosya bağlantılarını temsil eden nesne ise tree nesnesidir.____

Show answer

Blob dosya içeriğini saklar. Dizin yapısını ve dosya bağlantılarını temsil eden nesne ise tree nesnesidir.tree

Git Object Types

Blob

Stores file content
Tree

Stores directory and file links
Commit

Records a project snapshot
Hash

Identifies an object by its content

Next lesson: Refs

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