---
title: "Data Stream prerequisites"
slug: "datastream-spec"
tags: ["Data Stream", "spec"]
updated: 2026-10-08T07:01:33Z
published: 2026-10-08T07:01:33Z
canonical: "guide.ncloud-docs.com/datastream-spec"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Data Stream prerequisites

Available in VPC

Review supported environments, service limits, and pricing information before using Data Stream.

## Cloud specifications

Data Stream supports the following cloud environment specifications:

| Item | Specifications |
| --- | --- |
| Region (zone) | Korea |
| Platform | VPC |
| Language | Korean, English, and Japanese |

              Note

              

For more information about the VPC environment, see [VPC overview](https://www.ncloud.com/product/networking/vpc) on the NAVER Cloud Platform portal. To verify VPC support for specific services, see [Ncloud user environment guide](/docs/en/environment-environment-1-1).

## Service specifications

Data Stream supports the following infrastructure and limits:

| Item | Specifications |
| --- | --- |
| No. of topics | Up to 3 |
| No. of partitions | 1 to 16 (Default: 1) - Cannot be set to 0. - Partitions can only be added after creating a topic. |
| No. of connectors | 1 per topic |
| Data retention period | Min. 1 hour, max. 15 days (Default value: 1) - Data is automatically deleted once the retention period expires. |
| Data production speed | Max. 1 MB/sec per partition. Example: With 2 partitions, the maximum speed would be 2 MB/sec (1 MB/sec * 2 partitions). |
| Data consumption speed | Max. 2 MB/sec per partition. Example: With 2 partitions, the maximum speed would be 4 MB/sec (1 MB/sec * 2 partitions). |
| Data storage capacity | Max. 200 GB per partition - If 200 GB is exceeded before the retention period expires, older data is automatically deleted. |
| Data size | Max. 1 MB per file |

              Note

              

In order to prevent problems with overall real-time data processing when abnormally high traffic occurs, the maximum speed of data production and consumption is limited to ensure stable management.

## Security Precautions

The Data Stream service provides APIs for console actions and data transfer. For the authentication key used when calling the APIs, the access key and secret key of NAVER Cloud Platform Console main account cannot be used, as it may be exposed to unauthorized third parties during the data production/consumption process, which may allow them to arbitrarily change or view resources. Therefore, you must create a sub account and then use the sub account's access key and secret key. For how to create a sub account and how to check the sub account's access key and secret key, see [Sub Account user guide](https://guide.ncloud-docs.com/docs/en/subaccount-overview).

## Pricing information

For detailed criteria on the pricing information for Data Stream, go to **Services** > **Big Data & Analytics** > **Data Stream** in NAVER Cloud Platform portal and see the [**[Fees]**](https://www.ncloud.com/product/analytics/dataStream) tab. You can check the status of pricing information charged during the Data Stream service usage period under **Cost Explorer** menu in NAVER Cloud Platform portal.

              Caution

              

Data Stream fees are charged based on usage time according to the number of partitions and connectors within a topic, and amount of data produced, consumed, and stored. We provide a flexible and reasonable fee system to minimize unnecessary costs for users, so check the standards and operate appropriately.