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:DescribePolarFsAttribute

Last Updated:Dec 11, 2025

Queries the details of a PolarFileSystem (PolarFS) instance.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

polardb:DescribePolarFsAttribute

get

*All Resource

*

None None

Request syntax

POST  HTTP/1.1

Request parameters

Parameter

Type

Required

Description

Example

PolarFsInstanceId

string

Yes

The ID of the PolarFS instance.

pfs-2ze0i74ka607*****

QueryFuseMountInfo

boolean

No

Specifies whether to query the mount information of Filesystem in Userspace (FUSE). Valid values:

  • true: Queries the mount information.

  • false: Does not query the mount information. This is the default value.

false

DBClusterId

string

No

The cluster ID.

Note

Call the DescribeDBClusters operation to query the details of all clusters in your account, including cluster IDs.

pc-bp1q76364ird*****

Response elements

Element

Type

Description

Example

object

Schema of Response

RequestId

string

Id of the request

3F9E6A3B-C13E-4064-A010-18582A******

RelativeDbClusterId

string

The ID of the associated PolarDB cluster.

pc-2zejpr41d9xk3uk34

PolarFsInstanceId

string

The ID of the PolarFS instance.

pfs-2ze0i74ka607*****

PolarFsStatus

string

The status of the PolarFS instance.

Running

PolarFsVersion

string

The version.

1.0.1-1.0.3

PayType

string

The billing method. Valid values:

  • Postpaid: pay-as-you-go.

  • Prepaid: subscription.

Prepaid

DBType

string

The database engine type. Valid values:

  • MySQL

  • PostgreSQL

MySQL

PolarFsInstanceDescription

string

The description of the PolarFS instance.

pfs-xxx

RegionId

string

The region ID.

cn-beijing

ZoneId

string

The ID of the zone where the vSwitch is located.

cn-beijing-k

VPCId

string

The ID of the virtual private cloud (VPC).

vpc-**********

VSwitchId

string

The virtual switch ID.

vsw-**************

SecurityGroupId

string

The ID of the managed security group.

sg-bp**************

CreateTime

string

The creation time.

2021-08-02T05:57:10Z

ExpireTime

string

The expiration time of the cluster.

Note

This parameter is returned only for subscription clusters. For pay-as-you-go clusters, an empty value is returned.

2025-10-10T16:00:00Z

Expired

string

Indicates whether the cluster has expired.

Note

This parameter is returned only for subscription clusters.

false

PolarFsType

string

The instance version. Valid values:

  • PolarFS 2.0: 2.0

  • PolarFS 1.0: 1.0

PolarFS 2.0

StorageSpace

number

The storage space. Unit: GB.

1000

StorageUsed

number

The used storage space. Unit: bytes.

3012558848

Bandwidth

number

The bandwidth. Unit: MB/s.

100

BandwidthBaseLine

number

The baseline bandwidth. Unit: MB/s/TiB.

100

Category

string

The PolarFS edition. The following editions are supported:

  • high_performance: High-performance Edition

  • basic: Basic Edition

  • cold: Cold Storage Edition

high_performance

LockMode

string

The lock mode. Valid values:

  • Unlock: The cluster is not locked.

  • ManualLock: The cluster is manually locked.

  • LockByExpiration: The cluster is automatically locked after it expires.

Unlock

StorageType

string

The storage class for the High-performance Edition. Valid values:

  • ESSDPL1

  • ESSDPL0

The storage class for the Basic Edition. Valid values:

  • city_redundancy: zone-redundant storage

essdpl1

AcceleratingEnable

string

Indicates whether the acceleration cache is enabled. Valid values:

  • ON: Enabled

  • OFF: Disabled

ON

AcceleratedStorageSpace

number

The accelerated storage space. Unit: GB.

1000

MountInfo

object

The mount configuration.

PolarFsCluster

string

The file system name.

pfs-**********

Token

string

The token value.

a734298c391cb9ebd05e2ee85feb624

PolarDbProxy

string

The cluster management address.

TCP://**.**.**.**:3000,TCP://**.**.**.**:3000,TCP://**.**.**.**:3000

MinorVersion

string

The minor version of the instance.

v1.3.0-v1.1.1

ClientDownloadPath

string

The download path for the client.

oss://*

MetaUrl

string

The encrypted metadata address for the FUSE mount.

e6cc1d2e2a6fa292038d999fda6501*****

RelativePfsClusterId

string

BucketId

string

FileSystemId

string

CustomBucketPath

string

xxxxxx-%d.oss-cn-beijing-internal.aliyuncs.com

Examples

Success response

JSON format

{
  "RequestId": "3F9E6A3B-C13E-4064-A010-18582A******",
  "RelativeDbClusterId": "pc-2zejpr41d9xk3uk34",
  "PolarFsInstanceId": "pfs-2ze0i74ka607*****",
  "PolarFsStatus": "Running",
  "PolarFsVersion": "1.0.1-1.0.3",
  "PayType": "Prepaid",
  "DBType": "MySQL",
  "PolarFsInstanceDescription": "pfs-xxx",
  "RegionId": "cn-beijing",
  "ZoneId": "cn-beijing-k",
  "VPCId": "vpc-**********",
  "VSwitchId": "vsw-**************",
  "SecurityGroupId": "sg-bp**************",
  "CreateTime": "2021-08-02T05:57:10Z",
  "ExpireTime": "2025-10-10T16:00:00Z",
  "Expired": "false",
  "PolarFsType": "PolarFS 2.0",
  "StorageSpace": 1000,
  "StorageUsed": 3012558848,
  "Bandwidth": 100,
  "BandwidthBaseLine": 100,
  "Category": "high_performance",
  "LockMode": "Unlock",
  "StorageType": "essdpl1",
  "AcceleratingEnable": "ON",
  "AcceleratedStorageSpace": 1000,
  "MountInfo": {
    "PolarFsCluster": "pfs-**********",
    "Token": "a734298c391cb9ebd05e2ee85feb624",
    "PolarDbProxy": "TCP://**.**.**.**:3000,TCP://**.**.**.**:3000,TCP://**.**.**.**:3000"
  },
  "MinorVersion": "v1.3.0-v1.1.1",
  "ClientDownloadPath": "oss://*",
  "MetaUrl": "e6cc1d2e2a6fa292038d999fda6501*****",
  "RelativePfsClusterId": "",
  "BucketId": "",
  "FileSystemId": "",
  "CustomBucketPath": "xxxxxx-%d.oss-cn-beijing-internal.aliyuncs.com"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.