Scenario
You can create a tenant on MRS Manager to specify the resource usage.
Prerequisites
- A tenant name has been planned. The name must not be the same as that of a role or Yarn queue that exists in the current cluster.
- If a tenant requires storage resources, a storage directory has been planned based on service requirements, and the planned directory does not exist under the HDFS directory.
- The resources that can be allocated to the current tenant have been planned and the sum of the resource percentages of direct sub-tenants under the parent tenant at every level does not exceed 100%.
Procedure
- On MRS Manager, click Tenant.
- Click Create Tenant. On the page that is displayed, configure tenant properties.
Table 1 Tenant parameters Parameter
Description
Name
Specifies the name of the current tenant. The value consists of 3 to 20 characters, and can contain letters, digits, and underscores (_).
Tenant Type
The options include Leaf and Non-leaf. If Leaf is selected, the current tenant is a leaf tenant and no sub-tenant can be added. If Non-leaf is selected, sub-tenants can be added to the current tenant.
Dynamic Resources
Specifies the dynamic computing resources for the current tenant. The system automatically creates a task queue named after the tenant name in Yarn. When dynamic resources are not Yarn, the system does not automatically create a task queue.
Default Resource Pool Capacity (%)
Specifies the percentage of the computing resources used by the current tenant in the default resource pool.
Default Resource Pool Max. Capacity (%)
Specifies the maximum percentage of the computing resources used by the current tenant in the default resource pool.
Storage Resource
Specifies storage resources for the current tenant. The system automatically creates a file folder named after the tenant name in the /tenant directory. When a tenant is created for the first time, the system automatically creates the /tenant directory in the HDFS root directory. If storage resources are not HDFS, the system does not create a storage directory under the root directory of HDFS.
Space Quota (MB)
Specifies the quota for HDFS storage space used by the current tenant. The value ranges from 1 to 8796093022208. The unit is MB. This parameter indicates the maximum HDFS storage space that can be used by a tenant, but does not indicate the actual space used. If the value is greater than the size of the HDFS physical disk, the maximum space available is the full space of the oHDFS physical disk.
NOTE:To ensure data reliability, one copy of a file is automatically generated when the file is stored in HDFS. That is, two copies of the same file are stored by default. The HDFS storage space indicates the total disk space occupied by all these copies. For example, if the value of Storage Space Quota is set to 500, the actual space for storing files is about 250 MB (500/2 = 250).
Storage Path
Specifies the tenant's HDFS storage directory. The system automatically creates a file folder named after the tenant name in the /tenant directory by default. For example, the default HDFS storage directory for tenant ta1 is tenant/ta1. When a tenant is created for the first time, the system automatically creates the /tenant directory in the HDFS root directory. The storage path is customizable.
Service
Specifies other service resources associated with the current tenant. HBase is supported. To configure this parameter, click Associate Services. In the dialog box that is displayed, set Service to HBase. If Association Mode is set to Exclusive, service resources are occupied exclusively. If share is selected, service resources are shared.
Description
Specifies the description of the current tenant.
- Click OK to save the settings.
It takes a few minutes to save the settings. If the Tenant created successfully is displayed in the upper-right corner, the tenant is added successfully.
- Roles, computing resources, and storage resources are automatically created when tenants are created.
- The new role has permissions on the computing and storage resources. The role and its permissions are controlled by the system automatically and cannot be controlled manually under Manage Role.
- If you want to use the tenant, create a system user and assign the Manager_tenant role and the role corresponding to the tenant to the user. For details, see Creating a User.
Related Tasks
Viewing an added tenant
- On MRS Manager, click Tenant.
- In the tenant list on the left, click the name of the added tenant.
The Summary tab is displayed on the right by default.
- View Basic Information, Resource Quota, and Statistics of the tenant.
If HDFS is in the Stopped state, Available and Used of Space in Resource Quota are unknown.