# Check remaining resources of high-performance UMem - CheckUDredisSpaceAllowance

## Overview

Check remaining high-performance UMem resources, and resource pre-check before shard expansion.






## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `CheckUDredisSpaceAllowance`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.dezai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](/docs/api/summary/regionlist) |**Yes**|
| **Zone** | string | Availability Zone. See [Availability Zone List](/docs/api/summary/regionlist) |**Yes**|
| **Size** | int | The capacity size for creating an instance, the target capacity size for shard expansion |**Yes**|
| **Count** | string | The number of instances to be created, [1-10] |**Yes**|
| **GroupId** | string | Resource ID, a required parameter for scaling up and down |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|
| **Count** | int | When creating instance resources, it indicates the number that can be created; when expanding resources, returning 1 means expansion is possible, 0 means the resources in the available zone are insufficient and cannot be expanded. |**Yes**|




## Example

### Request Example
    
```
https://api.dezai.com/?Action=CheckUDredisSpaceAllowance
&Region=baQYMUCr
&Zone=KsoovIkN
&Size=nSRPldjY
&Count=fFoecQur
&GroupId=mJadWYEV
```

### Response Example
    
```json
{
  "Action": "CheckUDredisSpaceAllowanceResponse",
  "Count": 7,
  "NeedMigrate": "zgysRHAz",
  "RetCode": 0
}
```