⚡ ZeroDB Engine

Next-Gen File-Based Database - A simple, secure, zero-dependency database engine for Node.js. Perfect for local storage, IoT, and embedded applications.

🚀 ZeroDB Architecture

- Cluster & Distributed Operations: ZeroDB offers a cluster architecture that enables data to work simultaneously and synchronously across multiple servers. Thanks to its distributed structure, your data is replicated across different points seamlessly with high availability.
- File Locking Mechanism: To prevent multiple servers from conflicting on the same file, it uses "Advisory Locking" at the operating system level. This ensures no data conflicts occur during operations.
- Atomic Operations: Eliminates the risk of "partially committed data" during data transfer between servers. Data is first prepared in a temporary file and, once the operation is flawlessly approved, it's replaced with the original file in a single atomic step.
- Log-Based Synchronization: To maintain the current state between servers, it keeps every change in small log files. Other servers monitor these logs to continuously keep their local data up-to-date.
Strong Encryption: Your data is protected with industry-standard security protocols.
Auto-Scaling: Whether your data consists of 10 records or 100 Million records, ZeroDB analyzes your resources and automatically optimizes itself relative to CPU power.
Zero Dependency: Start using it immediately without dealing with complex configurations.
Data Integrity: Thanks to its Tamper-Proof structure, if any unauthorized modification is made to your data, the system instantly detects it.
TB+ Data Capacity: With its limitless structure, ZeroDB does not compromise on performance as your data grows.

🛠 ZeroDB Initial Settings

The settings for the const db = new ZeroDB(directory, memory, settings); command are as follows:

Setting	Description
`db`	Default database name to connect to.
`auth`	Automatic login information with `{ user: "username", pass: "password" }`.
`overwrite`	If `true`, deletes the existing database and sets it up from scratch.
`backup`	Folder path where backups will be saved (default: `./backup`).
`scaler`	Auto-Scaling Settings (Detailed):
`scaler.sequentialThreshold`	Switches from sequential processing to batch processing after 10 records.
`scaler.batchThreshold`	Switches to hybrid processing after 500 records.
`scaler.workerThreshold`	Switches to background workers after 10,000 records.
`scaler.streamThreshold`	Switches to stream mode after 100,000 records.
`scaler.maxWorkers`	Maximum number of workers to run based on CPU power.
`scaler.adaptiveEnabled`	Automatically adjusts itself based on system load (true/false).
`scaler.memorySafetyThreshold`	Puts the system into protection by slowing it down if memory usage exceeds 85%.
`scaler.cpuSafetyThreshold`	Puts the system into protection by slowing it down if CPU usage exceeds 80%.

🔐 User and Permission Management

Add User: `db.addUser(name, password, permissions, is_admin, database)`

Permissions (Permission List):

'add': Can add data.
'delete': Can delete data.
'list': Can read/query data.
'update': Can update data.
'create': Can create new tables.
'drop': Can completely drop a table.
'rename': Can rename a table.
'all': All permissions (Numeric equivalent: 127).

💻 Quick Start

Installation

ZeroDB First Run

npm install zero-db-engine

Basic Usage

import { ZeroDB } from 'zero-db-engine';


// 1. Create database (256MB cache, overwrite existing, without AutoScaler)
  const db = new ZeroDB("./databases", 256, {
    auth: { database: "my_app", pass: "123456", user: "admin" },
    overwrite: false,
    backup: './my_backups' ,
  });

// 2. Create database (256MB cache, overwrite existing, with AutoScaler configuration)
const db = new ZeroDB('./databases', 256, {
  overwrite: false ,
  backup: './my_backups' ,
  scaler: {
    sequentialThreshold: 10,    // Switch to batch processing after 10 records
    batchThreshold: 500,       // Switch to hybrid processing after 500 records
    workerThreshold: 10000,    // Switch to worker processing after 10K records
    streamThreshold: 100000,   // Switch to stream processing after 100K records
    maxWorkers: 4,             // Maximum number of worker threads
    batchSize: 100,            // Default batch size for operations
    adaptiveEnabled: true,     // Enable automatic scaling based on system resources
    metricsInterval: 1000,     // Metrics collection interval in ms
    memorySafetyThreshold: 0.85, // Scale down when memory usage > 85%
    cpuSafetyThreshold: 80       // Scale down when CPU usage > 80%
  }
});


// Create database & user
db.createDatabase('myapp');
db.addUser('admin', 'password123', ['add','delete','list','update','create','drop','rename'], true, 'myapp');
// db.deleteUser('eskikullanici', 'my_app'); -> Delete user
// db.listUsers('my_app'); -> List Database users
// const users = db.listUsers('my_app');
// console.log("Kullanıcı listesi:", users); // ["admin", "editor"]
db.login('myapp', 'admin', 'password123');

// Create table
db.createTable('users', [
  { name: 'id', type: 'auto', option: { isAuto: true } },
  { name: 'name', type: 'string' },
  { name: 'email', type: 'string' }
]);

// CRUD Operations
const users = db.table('users');
await users.add({ name: 'John', email: 'john@test.com' });
const all = await users.select('*').list();
await users.where({ name: 'John' }).update({ name: 'John Doe' });
await users.where({ name: 'John' }).delete();

// Exit
db.exit();

📖 API Reference

Database Operations

// Create/Drop databases
db.createDatabase('my_db');
db.dropDatabase('my_db');
const dbs = db.listDatabases();
const info = db.getDatabaseInfo('my_db');

Users & Permissions

// Add user - Number format
db.addUser('admin', 'password123', 127, true, 'myapp');

// Add user - Object format
db.addUser('admin', 'password123', {
  add: true,
  delete: false,
  list: true
}, false, 'myapp');

// Add user - Array format (recommended)
db.addUser('editor', 'pass', ['add', 'update', 'list'], false, 'myapp');

// Login/Logout
db.login('my_db', 'username', 'password');
db.logout();

// Delete user
db.deleteUser('username', 'my_db');

// Public/Private
db.setPublic('my_db', true);

// Owners
db.addOwner('my_db', 'username');
db.removeOwner('my_db', 'username');

Permission Options

Format	Example	Best For
Number	`127`	Advanced users
Object	`{ add: true, delete: false }`	Readable code
Array	`['add', 'update', 'list']`	Simple & clean

Available Permissions

Permission	Array Value	Bit
Add records	`'add'`	1
Delete records	`'delete'`	2
List/Query records	`'list'`	4
Update records	`'update'`	8
Create tables	`'create'`	16
Drop tables	`'drop'`	32
Rename tables	`'rename'`	64
All permissions	`'all'`	127

Methods

Data retrieval operations are performed with chained commands like table.select(...).where(...).list():

Method	What Does It Do?
`.where({ field: 'value' })`	Finds only rows where this field equals this value.
`.orWhere({ field: 'value' })`	Finds those matching one of the specified values.
`.whereIn('field', ['a', 'b'])`	Expects the field to match one of the values in this list.
`.whereBetween('field', 'min', 'max')`	Requires the value to be within the specified range.
`.like('field', 'pattern')`	Finds those matching a specific pattern (e.g., 'J%').
`.asc('field')`	Sorts in ascending order.
`.desc('field')`	Sorts in descending order.
`.limit(number)`	Limits the number of resulting records to the specified number.
`.page(no)`	Divides the results into pages.
`.sum('field')`	Returns the sum of all values.
`.avg('field')`	Calculates the average of the values.
`.groupBy('field')`	Categorizes data by the specified field.

Examples:

// All permissions
db.addUser('admin', 'pass', 'all', true, 'myapp');
db.addUser('admin', 'pass', ['add','delete','list','update','create','drop','rename'], true, 'myapp');

// Specific permissions
db.addUser('editor', 'pass', ['add', 'update', 'list'], false, 'myapp');

Table Operations

db.createTable('products', [
  { name: 'id', type: 'auto', option: { isAuto: true } },
  { name: 'name', type: 'string', option: { maxLength: 100 } },
  { name: 'price', type: 'number' }
]);
db.dropTable('products');
db.renameTable('old', 'new');

CRUD Operations

const table = db.table('users');

// Create
await table.add({ name: 'John', email: 'john@test.com' });
await table.addBatch([{ name: 'A' }, { name: 'B' }]);

// Read
await table.select('*').list();
await table.select(['name', 'email']).where({ name: 'John' }).list();
await table.where({ id: '1' }).first();
await table.count();

// Update
await table.where({ name: 'John' }).update({ name: 'John Doe' });

// Delete
await table.where({ name: 'John' }).delete();

// Upsert (Insert or Update)
await table.where({ email: 'john@test.com' }).upsert({ name: 'John', email: 'john@test.com' });

Query Options

const table = db.table('users');

// Filter (WHERE)
await table.where({ status: 'active' }).list();

// LIKE search
await table.like('name', 'J%').list();

// Sorting (ORDER BY)
await table.asc('name').list();              // Ascending
await table.desc('created_at').list();      // Descending
await table.orderBy('name', 'desc').list(); // Flexible (default asc)

// Pagination
await table.select('*').limit(10).list();           // First 10 records
await table.select('*').page(1).list();            // Page 1 (default 10 records)
await table.select('*').page(2).limit(20).list(); // Page 2, 20 records/page
await table.select('*').range(0, 10).list();      // Range (min-max)

// Count
await table.count();

// First record
await table.where({ id: '1' }).first();

// Aggregation
await table.sum('price');     // Sum
await table.avg('age');       // Average
await table.min('price');     // Minimum
await table.max('price');    // Maximum
await table.groupBy('category').list();  // Grouping
await table.distinct('category').list(); // Unique values (removes duplicates)

// Complex Conditions
await table.orWhere({ status: 'active' }).list();
await table.whereIn('id', ['1', '2', '3']).list();
await table.whereBetween('age', '18', '65').list();

Example Usage

Let's assume you have set up tables named users, orders, addresses, and no_orders_users and populated them with data as shown in the test cases.

Users Table (simplified schema):

id (auto, primary key)
username (string)
email (string)

Orders Table (simplified schema):

orderId (auto, primary key)
userId (string, foreign key to users.id)
product (string)
amount (number, although stored as string in test setup)

Addresses Table (simplified schema):

addressId (auto, primary key)
userId (string, foreign key to users.id)
address (string)
id (string, potential naming conflict with users.id)

Example 1: INNER JOIN to get users and their orders

This query will return only users who have placed orders, along with their order details. The join method takes the right table name, the foreign key field in the right table, the primary key field in the left table, and an array of fields to select from the right table.

import { ZeroDB } from 'zero-db';
import * as path from 'path';

// Assuming db is initialized and tables are set up as in join-test.ts
// const db = new ZeroDB(path.join(__dirname, 'test_databases', 'new_join_test_db'));
// db.useDatabase('join_db');

async function getUsersWithOrders(db: ZeroDB) {
  try {
    const usersTable = db.table("users");
    if (!usersTable) throw new Error("Users table not found.");

    // Using the programmatic API for INNER JOIN
    const queryResult = await usersTable
      .select(["id", "username", "email"]) // Fields from the 'users' table
      .join("orders", "userId", "id", ["orderId", "product", "amount"]) // Join with 'orders'
      .list(); // Execute the query

    console.log("Users with their orders:", queryResult);
    /* Expected Output might look like:
    [
      { id: '1', username: 'alice', email: 'alice@example.com', orderId: '101', product: 'Laptop', amount: '1200' },
      { id: '1', username: 'alice', email: 'alice@example.com', orderId: '102', product: 'Mouse', amount: '25' },
      { id: '2', username: 'bob', email: 'bob@example.com', orderId: '103', product: 'Keyboard', amount: '75' }
    ]
    */

  } catch (error) {
    console.error("Error executing join query:", error);
  }
}

// To run this example, you would need to initialize ZeroDB and set up tables.
// Example call (assuming db is initialized):
// getUsersWithOrders(db);

Example 3: Handling Field Name Conflicts during Joins

When joining tables where a field name is the same in both tables (e.g., id in users and addresses), ZeroDB automatically renames the conflicting field from the right table to prevent ambiguity. It typically appends _0 to the conflicting field name from the right table.

import { ZeroDB } from 'zero-db';
import * as path from 'path';

// Assuming db is initialized and tables are set up as in join-test.ts
// const db = new ZeroDB(path.join(__dirname, 'test_databases', 'new_join_test_db'));
// db.useDatabase('join_db');

async function joinWithFieldConflict(db: ZeroDB) {
  try {
    const usersTable = db.table("users");
    if (!usersTable) throw new Error("Users table not found.");

    const queryResult = await usersTable
      .where({ username: "alice" })
      .join("addresses", "userId", "id", ["address", "id"]) // Joining with 'addresses' which also has an 'id' field
      .list();

    console.log("Join with field conflict:", queryResult);
    /* Expected Output might look like:
    [
      {
        id: '1', // users.id
        username: 'alice',
        email: 'alice@example.com',
        address: '123 Main St',
        id_0: 'address_abc' // addresses.id, renamed to id_0 due to conflict
      }
    ]
    */
  } catch (error) {
    console.error("Error executing join with field conflict:", error);
  }
}

// Example call:
// joinWithFieldConflict(db);

Note: The exact API methods (db.table(), .select(), .join(), .leftJoin(), .where(), .list()) and their parameters are based on the observed syntax in join-test.ts. You should refer to the zero-db project's specific documentation or source code for definitive usage.

🛡 Maintenance and Backup

Backup / Restore Example

Maintenance Mode: db.backupManager.setMaintenanceMode(true); (Stops writing).
Backup: await db.backup('backup.tar.gz');
Restore: await db.restore('backup.tar.gz');
Exit Mode: db.backupManager.setMaintenanceMode(false); (Reactivates the system).
Set Backup Folder: ZeroDB("./databases", 256, { backup: './my_backups'}); (ZeroDB instance to use the ./my_backups directory).

Performance Test Results

Results Details

Data Integrity (0 errors, 0 data loss)

Records	Inserted	Retrieved	Status
1K	1,000	1,000	✅
10K	10,000	10,000	✅
100K	100,000	100,000	✅

Operations per Second

Operation	1K Records	10K Records
Query	500K ops/s	1.25M ops/s
Insert	7,752 ops/s	2,839 ops/s
Update	50K ops/s	45K ops/s
Delete	47K ops/s	61K ops/s

Auto-Scaling Strategies

Data Size	Strategy	Threads
< 10	sequential	1
10-500	batch	2-4
500-10K	hybrid	4-8
10K-100K	worker	8-16
> 100K	stream	16-32

🏆 Comparison

Feature	SQLite	PostgreSQL	Redis	ZeroDB
Query Speed	10K	100K	2M	1.25M
Zero Dependency	✅	❌	❌	✅
Tamper-Proof	❌	✅	❌	✅
Auto-Scaling	❌	❌	❌	✅
Easy Setup	✅	❌	❌	✅

License

MIT - Open source
Commercial - Available for paid versions

ZeroDB | Author: Levent Inan (@asymmetricstar)

Name		Name	Last commit message	Last commit date
Latest commit History 13 Commits
examples		examples
src		src
.gitattributes		.gitattributes
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
backup.md		backup.md
install.md		install.md
package.json		package.json
test_raporu.md		test_raporu.md

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⚡ ZeroDB Engine

🚀 ZeroDB Architecture

🛠 ZeroDB Initial Settings

🔐 User and Permission Management

Add User: `db.addUser(name, password, permissions, is_admin, database)`

💻 Quick Start

Installation

Basic Usage

📖 API Reference

Database Operations

Users & Permissions

Permission Options

Available Permissions

Methods

Table Operations

CRUD Operations

Query Options

Example Usage

Example 1: INNER JOIN to get users and their orders

Example 3: Handling Field Name Conflicts during Joins

🛡 Maintenance and Backup

Performance Test Results

Data Integrity (0 errors, 0 data loss)

Operations per Second

Auto-Scaling Strategies

🏆 Comparison

License

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⚡ ZeroDB Engine

🚀 ZeroDB Architecture

🛠 ZeroDB Initial Settings

🔐 User and Permission Management

Add User: db.addUser(name, password, permissions, is_admin, database)

💻 Quick Start

Installation

Basic Usage

📖 API Reference

Database Operations

Users & Permissions

Permission Options

Available Permissions

Methods

Table Operations

CRUD Operations

Query Options

Example Usage

Example 1: INNER JOIN to get users and their orders

Example 3: Handling Field Name Conflicts during Joins

🛡 Maintenance and Backup

Performance Test Results

Data Integrity (0 errors, 0 data loss)

Operations per Second

Auto-Scaling Strategies

🏆 Comparison

License

About

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Add User: `db.addUser(name, password, permissions, is_admin, database)`

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