---
title: "Get changeable node specification (G3)"
slug: "ses-getserverspeclistforspecchange"
updated: 2026-09-17T09:50:01Z
published: 2026-09-17T09:50:01Z
canonical: "api.ncloud-docs.com/ses-getserverspeclistforspecchange"
---

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

# Get changeable node specification (G3)

Available in VPC

Get changeable server specifications for each node in a search engine cluster.

              Note

              

This is a dedicated API for third-generation servers of the KVM hypervisor type.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| POST | /api/v2/cluster/getServerSpecListForSpecChange/{serviceGroupInstanceNo} (Korea Region) |
| POST | /api/sgn-v2/cluster/getServerSpecListForSpecChange/{serviceGroupInstanceNo} (Singapore Region) |
| POST | /api/jpn-v2/cluster/getServerSpecListForSpecChange/{serviceGroupInstanceNo} (Japan Region) |

### Request headers

For information about the headers common to all Search Engine Service APIs, see [Search Engine Service request headers](/docs/en/analytics-vpcsearchengine#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request path parameters

You can use the following path parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `serviceGroupInstanceNo` | Integer | Required | Cluster instance number - See [Get cluster list](/docs/en/analytics-vpcsearchengine-cluster-getclusterinfolist). |

### Request body

You can include the following data in the body of your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `computeInstanceProductCode` | String | Required | Node server type code - See [Get server type (G3)](/docs/en/ses-getserverspeclist). |

### Request example

The request example is as follows:

```
curl --location --request POST 'https://vpcsearchengine.apigw.ntruss.com/api/v2/cluster/getServerSpecListForSpecChange/1039*****' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--header 'Content-Type: application/json' \
--data '{
    "computeInstanceProductCode": "SVR.VELST.STAND.C002.M008.NET.SSD.B050.G003"
}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `code` | Integer | - | Response code |
| `message` | String | - | Response message |
| `result` | Object | - | Response result |
| `result.managerNodeProductList` | Array | - | Manager node server type list - See [Server type information](/docs/en/ses-getserverspeclistforspecchange#%EC%84%9C%EB%B2%84%ED%83%80%EC%9E%85%EC%A0%95%EB%B3%B4) for descriptions of each field. |
| `result.dataNodeProductList` | Array | - | Data node server type list - See [Server type information](/docs/en/ses-getserverspeclistforspecchange#%EC%84%9C%EB%B2%84%ED%83%80%EC%9E%85%EC%A0%95%EB%B3%B4) for descriptions of each field. |
| `result.masterNodeProductList` | Array | - | Master node server type list - See [Server type information](/docs/en/ses-getserverspeclistforspecchange#%EC%84%9C%EB%B2%84%ED%83%80%EC%9E%85%EC%A0%95%EB%B3%B4) for descriptions of each field. |
| `requestId` | String | - | ID for the request - UUID format |

#### Server type information

The following describes the server type information.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `serverSpecCode` | String | - | Server specification code |
| `serverSpecTypeCode` | String | - | Server classification |
| `serverSpecDescription` | String | - | Server description |
| `productCode` | String | - | Server type code |
| `hypervisorCode` | String | - | Hypervisor code |
| `generationCode` | String | - | Server generation code |
| `cpuArchitectureCode` | String | - | CPU architecture type |
| `cpuCount` | Integer | - | Number of CPUs |
| `memorySize` | Integer | - | Memory size (GB) |
| `blockStorageMaxCount` | Integer | - | Maximum number of assignable storage |
| `networkInterfaceMaxCount` | Integer | - | Maximum number of assignable network interfaces |
| `zoneNoList` | Array | - | Zone number list |
| `computeInstanceDetailTypeCode` | String | - | Detailed server type code |
| `isChangeSpec` | Boolean | - | Whether server type can be changed - `true` \| `false` - `true`: changeable - `false`: not changeable |
| `isSelected` | Boolean | - | Current usage status - `true` \| `false` - `true`: in use - `false`: not in use |
| `memorySizeToBytes` | Integer | - | Memory size (byte) |

### Response status codes

For response status codes common to all Search Engine Service APIs, see [Search Engine Service response status codes](/docs/en/analytics-vpcsearchengine#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "code": 0,
    "message": "SUCCESS",
    "result": {
        "managerNodeProductList": [
            {
                "serverSpecCode": "elst.c2-g3",
                "serverSpecTypeCode": "HICPU",
                "serverSpecDescription": "[HICPU] vCPU 2EA, Memory 4GB",
                "productCode": "SVR.VELST.HICPU.C002.M004.NET.SSD.B050.G003",
                "hypervisorCode": "KVM",
                "generationCode": "G3",
                "cpuArchitectureCode": "X86_64",
                "cpuCount": 2,
                "memorySize": 4,
                "blockStorageMaxCount": 20,
                "networkInterfaceMaxCount": 3,
                "zoneNoList": [
                    2,
                    3
                ],
                "computeInstanceDetailTypeCode": null,
                "isChangeSpec": true,
                "isSelected": true,
                "memorySizeToBytes": 4294967296
            },
            ...
        ],
        "dataNodeProductList": [
            {
                "serverSpecCode": "elst.c2-g3",
                "serverSpecTypeCode": "HICPU",
                "serverSpecDescription": "[HICPU] vCPU 2EA, Memory 4GB",
                "productCode": "SVR.VELST.HICPU.C002.M004.NET.SSD.B050.G003",
                "hypervisorCode": "KVM",
                "generationCode": "G3",
                "cpuArchitectureCode": "X86_64",
                "cpuCount": 2,
                "memorySize": 4,
                "blockStorageMaxCount": 20,
                "networkInterfaceMaxCount": 3,
                "zoneNoList": [
                    2,
                    3
                ],
                "computeInstanceDetailTypeCode": null,
                "isChangeSpec": true,
                "isSelected": true,
                "memorySizeToBytes": 4294967296
            },
            ...
        ],
        "masterNodeProductList": [
            {
                "serverSpecCode": "elst.c2-g3",
                "serverSpecTypeCode": "HICPU",
                "serverSpecDescription": "[HICPU] vCPU 2EA, Memory 4GB",
                "productCode": "SVR.VELST.HICPU.C002.M004.NET.SSD.B050.G003",
                "hypervisorCode": "KVM",
                "generationCode": "G3",
                "cpuArchitectureCode": "X86_64",
                "cpuCount": 2,
                "memorySize": 4,
                "blockStorageMaxCount": 20,
                "networkInterfaceMaxCount": 3,
                "zoneNoList": [
                    2,
                    3
                ],
                "computeInstanceDetailTypeCode": null,
                "isChangeSpec": false,
                "isSelected": false,
                "memorySizeToBytes": 4294967296
            },
            ...
        ]
    },
    "requestId": "5ca2eb64-****-****-****-3cb468f35f7a"
}
```