# 示例3：查询备份信息
#### 场景描述
本章节指导用户"查询所有备份"接口，使用分页参数查询租户所有的备份。
本节示例操作包括指定limit和offset查询所有备份列表和查询指定资源类型备份列表的操作。查询所有备份接口支持过滤和排序参数，参数详情请参见[查询所有备份](https://support.huaweicloud.com/api-cbr/ListBackups.html)。
#### 涉及接口
本示例场景涉及如下接口调用：
- [使用指定limit和offset查询所有备份列表]
- [按照指定的资源类型查询所有备份列表]
 
#### 操作步骤
1. 使用指定的limit和offset查询所有备份列表。
   - 接口相关信息 URI格式：GET /v3/{project_id}/backups
     详情请参见[查询所有备份](https://support.huaweicloud.com/api-cbr/ListBackups.html)。
     
   
   - 请求示例 GET: https://*{endpoint*}/v3/0605767b5780d5762fc5c0118072a564/backups?limit=100\&offset=0
     {endpoint}信息请从[地区和终端节点](https://developer.huaweicloud.com/endpoint?CBR)获取。
     
   
   - 响应示例
     ```
     {
        "backups": [
              ......
             {
                 "children": [],
                 "checkpoint_id": "e6aec7a9-7b03-4c1d-8a07-5983b53c53f3",
                 "created_at": "2020-08-18T06:00:45.375070",
                 "description": null,
                 "expired_at": null,
                 "extend_info": {
                     "app_consistency": {
                         "app_consistency": "0",
                         "app_consistency_status": "0",
                         "app_consistency_error_code": "0",
                         "app_consistency_error_message": ""
                     },
                     "auto_trigger": true,
                     "bootable": null,
                     "os_images_data": null,
                     "progress": null,
                     "snapshot_id": null,
                     "support_lld": false,
                     "supported_restore_mode": "backup",
                     "system_disk": false,
                     "contain_system_disk": true,
                     "architecture": "x86_64"
                 },
                 "id": "62617971-839d-4d23-8dfd-4ca65c039bdf",
                 "image_type": "backup",
                 "name": "autobk_cf91_0003",
                 "parent_id": null,
                 "project_id": "0605767b5780d5762fc5c0118072a564",
                 "protected_at": "2020-08-18T06:01:10.432117",
                 "provider_id": "0daac4c5-6707-4851-97ba-169e36266b66",
                 "resource_az": "br-iaas-odin1a",
                 "resource_id": "d6bf7592-ca52-43a2-9979-e418d64b29bb",
                 "resource_name": "xzl_ecs-0003-0001",
                 "resource_size": 40,
                 "resource_type": "OS::Nova::Server",
                 "status": "available",
                 "updated_at": "2020-08-18T06:06:44.928325",
                 "vault_id": "1572bd27-e221-4f28-94ca-9777d232fcd7",
                 "replication_records": []
             }
         ],
         "count": 1663
     }
     ```
     
    
2. 按照指定的资源类型查询所有备份列表。
   - 接口相关信息 URI格式：GET /v3/{project_id}/backups
     接口与[步骤1]保持一致。
     
   
   - 请求示例 GET: https://{endpoint}/v3/0605767b5780d5762fc5c0118072a564/backups?resource_type=OS::Nova::Server\&limit=5\&offset=0
     {endpoint}信息请从[地区和终端节点](https://developer.huaweicloud.com/endpoint?CBR)获取。
     
   
   - 响应示例
     ```
     {
         "backups": [
              ......
             {
                 "children": [],
                 "checkpoint_id": "e328d05e-4b28-4898-b8c1-2bfe6621ec03",
                 "created_at": "2020-08-18T07:00:46.932061",
                 "description": null,
                 "expired_at": null,
                 "extend_info": {
                     "app_consistency": {
                         "app_consistency": "0",
                         "app_consistency_status": "0",
                         "app_consistency_error_code": "0",
                         "app_consistency_error_message": ""
                     },
                     "auto_trigger": true,
                     "bootable": null,
                     "os_images_data": null,
                     "progress": null,
                     "snapshot_id": null,
                     "support_lld": false,
                     "supported_restore_mode": "backup",
                     "system_disk": false,
                     "contain_system_disk": true,
                     "architecture": "x86_64"
                 },
                 "id": "c892ed58-3a18-47c2-9e31-a1d543dc490a",
                 "image_type": "backup",
                 "name": "autobk_7234_0003",
                 "parent_id": null,
                 "project_id": "0605767b5780d5762fc5c0118072a564",
                 "protected_at": "2020-08-18T07:01:12.675112",
                 "provider_id": "0daac4c5-6707-4851-97ba-169e36266b66",
                 "resource_az": "br-iaas-odin1a",
                 "resource_id": "d6bf7592-ca52-43a2-9979-e418d64b29bb",
                 "resource_name": "xzl_ecs-0003-0001",
                 "resource_size": 40,
                 "resource_type": "OS::Nova::Server",
                 "status": "available",
                 "updated_at": "2020-08-18T07:06:47.518054",
                 "vault_id": "1572bd27-e221-4f28-94ca-9777d232fcd7",
                 "replication_records": []
             }
         ],
         "count": 150
     }
     ```