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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).
Metadata Disks

Metadata Disks

When cabinet-level security is implemented, the configuration principles of ZK disks are as follows:
  • If the number of cabinets is less than or equal to 4, deploy three independent ZK disks (HDDs are recommended).
  • If the number of cabinets is greater than 4, deploy five independent ZK disks (HDDs are recommended).
  • Seven independent ZK disks (SSDs are recommended) can be deployed based on the planning and customer requirements and must belong to different cabinets.
NOTE:

Nodes where ZK disks belong must be distributed in different cabinets to maximize system reliability.

When server-level security is implemented, the configuration principles of ZK disks are as follows:
  • If the number of servers is less than or equal to 32, deploy three independent ZK disks (HDDs are recommended) by default.
  • If the number of servers is greater than 32 but less than or equal to 128, deploy five independent ZK disks (HDDs are recommended) by default.
  • If the number of servers is greater than 128, deploy five independent ZK disks (SSDs are recommended) by default. You can also choose to deploy seven independent ZK disks (SSDs are recommended) based on the planning and customer requirements.

If one FusionStorage Block system has storage pools composed of multiple storage media such as SATA, SAS, and SSD, the interaction between metadata may be affected because storage servers that use SAS disks and SSDs require high network bandwidth. Therefore, metadata is preferentially deployed on storage servers that use SATA disks.

If DR services are deployed on a server where the storage node resides, for details about the ZK disk space requirements of DR services, see the metadata space requirements in Overview > System Requirements of FusionStorage Block Storage Service Disaster Recovery Feature Guide.

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Updated: 2019-06-29

Document ID: EDOC1100016637

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