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FusionStorage V100R006C20 Block Storage Service Software Installation Guide 07

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Storage

Storage

Table 3-4 describes the storage requirements.
Table 3-4  Storage requirements
Category

Requirement for System Disks

Requirement for Primary Storage

Cache Requirement

Compute node

RAID1, and for details about how to configure RAID 1, see server documents of the corresponding vendor.

NOTE:

When the converged deployment mode is used in the VMware scenario, because the RAID card of the main storage needs to be directly connected to a CVM, the server system disks and main storage must use different RAID cards. In addition, the RAID card of the main storage cannot be directly connected to other devices.

None

NOTE:

In the FusionCompute, FusionSphere OpenStack scenario, you need to install a CLI tool for some RAID cards to perform operations such as disk configuration management. For details about models of the RAID cards for which the CLI tool needs to be installed, see Interoperability.

None

Storage node

  • Each server must provide 4 to 36 disks (including independent metadata disks) for FusionStorage Block to use.
  • Differences between the numbers of disks on different storage nodes in a storage pool cannot be greater than two.

    The disks must have been added to the storage pool. Those disks outside of the storage pool are not counted.

  • Differences between the numbers of disks on different storage nodes in a storage pool cannot be greater than 30% of the disks on the server with the maximum number of disks. For example, if a server holds three disks and the server with the maximum number of disks in the storage pool holds five disks, the disks fail to meet FusionStorage Block requirements.

    The disks must have been added to the storage pool. Those disks outside of the storage pool are not counted.

  • The disks in the same storage pool must be of the same type.
  • Ensure that the sizes of the disks in the same storage pool are the same. Otherwise, the system uses the minimum disk capacity in the storage pool as the raw capacity of each disk.
  • For servers added to the same storage pool, it is advised that the disk slots on the servers added to the storage pool are consistent.
  • The main storage media can be SATA disks, SATA SSD disks, NL-SAS disks, SAS disks, SAS SSD disks, NVMe SSD disks, PCIe SSD cards (non-NVMe protocol) and NVMe SSD cards.

    NOTICE:

    If SSD devices are used as the primary storage in replica storage pools, the drive writes per day (DWPD) of the primary storage devices must be greater than or equal to 1 (SSD devices ensure a three-year proper service running).

    If SSD devices are used as the primary storage in EC storage pools, the DWPD of the primary storage devices must be greater than or equal to 1 (SSD devices ensure a three-year proper service running).

  • Currently, FusionStorage Block does not support 4K sector disks.
  • FusionStorage Block does not support disks on the same server to be connected to multiple RAID cards.
NOTE:

The RAID configuration of main storage disks varies among different RAID cards. For details about requirements, see Interoperability.

CLI tools need to be installed for some RAID cards. Such tools allow users to configure and manage disks. For details about the RAID card models that require CLI tool installation, see Interoperability.

  • Each server must provide 0 to 4 cache devices for each storage pool to use.
  • The numbers, the types and the sizes of cache devices on different storage nodes in one storage pool must be consistent.
  • If SATA or SAS disks are used as the primary storage in the storage pool, the storage pool must use cache devices.
  • The cache media can be SSD disks, SSD cards, PCIe SSD cards (non-NVMe protocol) and NVMe SSD cards. NVDIMM disks are not supported.s.
    NOTICE:

    If SSD devices are used as the cache, DWPD of the cache devices must be greater than 3 (SSD devices ensure a five-year proper service running).

  • Currently, FusionStorage Block does not support 4K sector disks.
  • FusionStorage Block does not support disks on the same server to be connected to multiple RAID cards.
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Updated: 2019-06-29

Document ID: EDOC1100016637

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