<Note>
Sandbox persistence is currently in public beta:
1. Consider [some limitations](#limitations-while-in-beta).
2. The persistence is free for all users during the beta.
</Note>

The sandbox persistence allows you to pause your sandbox and resume it later from the same state it was in when you paused it.

This includes not only state of the sandbox's filesystem but also the sandbox's memory. This means all running processes, loaded variables, data, etc.

## Pausing sandbox
When you pause a sandbox, both the sandbox's filesystem and memory state will be saved. This includes all the files in the sandbox's filesystem and all the running processes, loaded variables, data, etc.

<CodeGroup>
```js
import { Sandbox } from '@e2b/code-interpreter'

const sbx = await Sandbox.create()
console.log('Sandbox created', sbx.sandboxId)

// Pause the sandbox
// You can save the sandbox ID in your database
// to resume the sandbox later
const sandboxId = await sbx.betaPause() // $HighlightLine
console.log('Sandbox paused', sandboxId) // $HighlightLine
```
```python
from e2b_code_interpreter import Sandbox

sbx = Sandbox.create()
print('Sandbox created', sbx.sandbox_id)

# Pause the sandbox
# You can save the sandbox ID in your database
# to resume the sandbox later
sandbox_id = sbx.beta_pause() # $HighlightLine
print('Sandbox paused', sandbox_id) # $HighlightLine
```
</CodeGroup>


## Resuming sandbox
When you resume a sandbox, it will be in the same state it was in when you paused it.
This means that all the files in the sandbox's filesystem will be restored and all the running processes, loaded variables, data, etc. will be restored.

<CodeGroup>
```js
import { Sandbox } from '@e2b/code-interpreter'

const sbx = await Sandbox.create()
console.log('Sandbox created', sbx.sandboxId)

// Pause the sandbox
// You can save the sandbox ID in your database
// to resume the sandbox later
const sandboxId = await sbx.betaPause()
console.log('Sandbox paused', sandboxId)

// Connect to the sandbox (it will automatically resume the sandbox, if paused)
const sameSbx = await sbx.connect() // $HighlightLine
console.log('Connected to the sandbox', sameSbx.sandboxId) // $HighlightLine
```
```python
from e2b_code_interpreter import Sandbox

sbx = Sandbox.create()
print('Sandbox created', sbx.sandbox_id)

# Pause the sandbox
# You can save the sandbox ID in your database
# to resume the sandbox later
sandbox_id = sbx.beta_pause()
print('Sandbox paused', sandbox_id)

# Connect to the sandbox (it will automatically resume the sandbox, if paused)
same_sbx = sbx.connect() # $HighlightLine
print('Connected to the sandbox', same_sbx.sandbox_id) # $HighlightLine
```
</CodeGroup>

## Listing paused sandboxes
You can list all paused sandboxes by calling the `Sandbox.list` method and supplying the `state` query parameter.
More information about using the method can be found in [List Sandboxes](/docs/sandbox/list).

<CodeGroup>
```js
import { Sandbox, SandboxInfo } from '@e2b/code-interpreter'

// List all paused sandboxes
const paginator = Sandbox.list({ query: { state: ['paused'] } }) // $HighlightLine

// Get the first page of paused sandboxes
const sandboxes = await paginator.nextItems() // $HighlightLine

// Get all paused sandboxes
while (paginator.hasNext) {
  const items = await paginator.nextItems()
  sandboxes.push(...items)
}
```
```python
# List all paused sandboxes
from e2b_code_interpreter import Sandbox, SandboxQuery, SandboxState

paginator = Sandbox.list(SandboxQuery(state=[SandboxState.PAUSED])) # $HighlightLine

# Get the first page of paused sandboxes
sandboxes = paginator.next_items() # $HighlightLine

# Get all paused sandboxes
while paginator.has_next:
  items = paginator.next_items()
  sandboxes.extend(items)
```
</CodeGroup>

## Removing paused sandboxes

You can remove paused sandboxes by calling the `kill` method on the Sandbox instance.

<CodeGroup>
```js
import { Sandbox } from '@e2b/code-interpreter'

const sbx = await Sandbox.create()
console.log('Sandbox created', sbx.sandboxId)

// Pause the sandbox
// You can save the sandbox ID in your database
// to resume the sandbox later
const sandboxId = await sbx.betaPause()

// Remove the sandbox
await sbx.kill() // $HighlightLine

// Remove sandbox by id
await Sandbox.kill(sandboxId) // $HighlightLine
```
```python
from e2b import Sandbox

sbx = Sandbox.create()

# Pause the sandbox
sandbox_id = sbx.beta_pause()

# Remove the sandbox
sbx.kill() # $HighlightLine

# Remove sandbox by id
Sandbox.kill(sandbox_id) # $HighlightLine
```
</CodeGroup>

## Sandbox's timeout
When you connect to a sandbox, the sandbox's timeout is reset to the default timeout of an E2B sandbox - 5 minutes.

You can pass a custom timeout to the `Sandbox.connect()`/`Sandbox.connect()` method like this:

<CodeGroup>
```js
import { Sandbox } from '@e2b/code-interpreter'

const sbx = await Sandbox.connect(sandboxId, { timeoutMs: 60 * 1000 }) // 60 seconds
```
```python
from e2b_code_interpreter import Sandbox

sbx = Sandbox.connect(sandbox_id, timeout=60) # 60 seconds
```
</CodeGroup>

## Network
If you have a service (for example a server) running inside your sandbox and you pause the sandbox, the service won't be accessible from the outside and all the clients will be disconnected.
If you resume the sandbox, the service will be accessible again but you need to connect clients again.


## Limitations while in beta
- It takes about 4 seconds per 1 GB RAM to pause the sandbox
- It takes about 1 second to resume the sandbox
- Sandbox can be paused up to 30 days
  - After 30 days, the data will be deleted and you will not be able to resume the sandbox. Trying to resume sandbox that was deleted or does not exist will result in the `NotFoundError` error in JavaScript SDK and `NotFoundException` exception in Python SDK
