Creating a Converged Storage Pool

Prerequisites

• The storage system has been installed on storage nodes.
• You are advised to configure 32 nodes for each disk pool. If the number of nodes exceeds 32, divide them into multiple disk pools. In this case, it is recommended that the number of nodes in each disk pool be the same. For example, if there are 90 nodes, you are advised to divide them into three disk pools. Each disk pool contains 30 nodes.
• HDD 4KN disks cannot be added to the same disk pool as other types of disks.
• The total capacity of cache disks on a single storage node to be added to a storage pool must be greater than Max. Main Storage Media per Node x 40 GB.

Precautions

Currently, only one converged storage pool can be created.

Procedure

1. Choose Resources > Resources > Storage Pool.
2. Click Create.

   The Create Storage Pool page is displayed.

3. In the Basic Information area, configure basic information for the storage pool.

   Table 1 describes related parameters.

   Table 1 Storage pool parameters

   Parameter	Description
   Storage Pool Name	Indicates the name of the storage pool. NOTE: The name must be unique. The value can contain only letters, digits, underscores (_), and hyphens (-). The name contains 1 to 64 characters.
   Service Type	Indicates the service type of the storage pool. Select Converged.
   Storage Pool Type	Indicates the type of the storage pool. Select Common.
   Security Level	Indicates the security level of the storage pool. Select Node. N data fragments and M parity fragments are stored on different nodes. After M nodes are faulty, the system can read and write data properly, services are not interrupted, and data is not lost.
   Redundancy Policy	Indicates the redundancy policy of the storage pool. Select EC to implement data redundancy protection by calculating parity fragments.
   EC	Indicates the EC redundancy policy of the storage pool. Select the EC redundancy ratio planned in the Bill of Quotation (BOQ).
   Storage Pool Mode	If EC redundancy level of the storage pool is +3 or higher, you need to set the storage pool mode. If the reliability mode is selected, write cache acceleration cannot be enabled.

4. Create a disk pool.
   

   For details about how to configure disk pools, see the plan in the BOQ.

   1. In the Disk Pool area, click Create.

      The Create Disk Pool page is displayed.

   2. Set basic parameters for the disk pool.
      Table 2 describes related parameters.

      Table 2 Disk pool parameters

      Parameter	Description
      Disk Pool Name	Indicates the name of the disk pool. NOTE: The name must be unique. The value can contain only letters, digits, underscores (_), and hyphens (-). The name contains 1 to 64 characters.
      Main Storage	Indicates the main storage type of the storage pool. When Storage Pool Type is set to Common, possible options are SAS, Self-encrypting SAS, SATA, Self-encrypting SATA, SSD, and SSD card or NVMe SSD. In this case, self-encrypting drives function as common disks and do not use the encryption function. When Storage Pool Type is set to Self-encrypting, possible options are Self-encrypting SAS and Self-encrypting SATA. Each node must be configured with at least four disks of the same type. NOTE: Meanings of the values are: SAS: SAS HDDs SATA: SATA HDDs SSD card or NVMe SSD: NVMe SSD disks SSD: SAS SSDs
      Cache	Indicates the cache type of the storage pool. NOTE: This parameter is not required when Main Storage is set to SSD or SSD card or NVMe SSD. Meanings of the values are: SSD card or NVMe SSD: NVMe SSD disks SSD: SAS SSDs
      Max. Main Storage Media per Node	Indicates the maximum number of main storage disks that can be used on a single node to store user data. The value determines the allocation of cache and compute resources on the node. Set this parameter based on site requirements. To ensure that cache resources can be allocated to newly added main storage disks in the case of capacity expansion, you are advised to set this parameter based on the total number of main storage disks after capacity expansion. If the value is too small, newly added main storage disks cannot be allocated with cache resources. Cache resources can be allocated to newly-added main storage disks only after both main storage disks and cache disks are added. If the value is too large, extra cache resources are reserved. As a result, cache resources cannot be fully utilized to improve read/write performance. If you select Self-adaptive, the system automatically determines the value based on the number of selected main storage disks. Assume that the number of selected main storage disks is N: If 4 ≤ N ≤ 12, a single node supports a maximum of 12 main storage disks. If 12 < N ≤ 36, a single node supports a maximum of 24 main storage disks. If the type of nodes in the disk pool is high-density, a single node supports a maximum of 60 main storage disks. If you select Custom, set the value based on site requirements. The value ranges from 4 to 60.
      Tier Grade	Indicates the tier grade of the disk pool, which is defined based on the type of main storage disks in the disk pool. Possible values are Hot, Warm, Cold, and Default. You can choose Resources > Tuning > SmartTier and set tiering policies to store different files to disk pools of different tier grades. NOTE: If you select Default: When Main Storage is set to SSD or SSD card or NVMe SSD, the tier grade of the disk pool is Hot. When Main Storage is set to SAS, the tier grade of the disk pool is Warm. When Main Storage is set to SATA, the tier grade of the disk pool is Cold. If you select Custom, you are advised to configure the storage tiers based on the default rules.

   3. In the Choose Node and Disk area, select the nodes and disks that are used to create the disk pool.
      

      • You can click Add and add nodes and disks in the cluster to the disk pool on the Choose Node and Disk page that is displayed.
      • You can select one or more added nodes or disks and click Remove to remove them.
   4. Click OK and confirm your operation as prompted.

5. Click Create.
6. Confirm your operation as prompted.