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Data Persistence

The plugin-data-persistence plugin allows you to persist your Orama database to disk or in-memory and restore it later.

Installation

You can install the plugin using any major Node.js/Bun package manager:

Terminal window
npm install @orama/plugin-data-persistence

Usage

Plugin usage depends on the runtime that you are using, even though the goal is to expose the exact same APIs for browsers, Deno, and all the other JavaScript engines.

Let’s consider the following Orama instance as a common database source for both browsers and JavaScript engines:

import { create, insert } from "@orama/orama";


const originalInstance = create({
  schema: {
    author: "string",
    quote: "string",
  },
});


insert(originalInstance, {
  quote: "He who is brave is free",
  author: "Seneca",
});


insert(originalInstance, {
  quote: "Make each day your masterpiece",
  author: "John Wooden",
});


insert(originalInstance, {
  quote: "You must be the change you wish to see in the world",
  author: "Mahatma Gandhi",
});

Persisting the database to disk (in-memory usage)

Now we have a Orama instance containing three quotes. We can use the plugin-data-persistence plugin to save the database to a file:

import { persist } from "@orama/plugin-data-persistence";


const JSONIndex = await persist(originalInstance, "json");

Restore the database from disk (in-memory usage)

To restore the database from an in-memory snapshot (created via the persist function):

import { search } from "@orama/orama";
import { restore } from "@orama/plugin-data-persistence";


const newInstance = await restore("json", JSONIndex);


search(newInstance, {
  term: "...",
});

Persisting the database to disk (server usage)

Now we have a Orama instance containing three quotes. We can use the plugin-data-persistence plugin to save the database to a file:

import { persistToFile } from "@orama/plugin-data-persistence/server";


const filePath = await persistToFile(
  originalInstance,
  "binary",
  "./quotes.msp"
);

Restore the database from disk (server usage)

To restore the database from the disk:

import { restoreFromFile } from "@orama/plugin-data-persistence/server";
const db = await restoreFromFile("binary", filePath);

CommonJS Imports

Orama plugins ship ESM modules by default. This allows us to move faster when providing new features and bug fixes, as well as using the "exports" field in package.json to provide a better developer experience.

CommonJS imports are still supported, but we suggest you to migrate to ESM.

TypeScript

Set moduleResolution in the compilerOptions in your tsconfig.json to be either Node16 or NodeNext.

When importing types, always refer to the standard import:

import type { persistToFile } from "@orama/plugin-data-persistence";