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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).
Memory

Memory

Separated Deployment Scenario

Computing node memory capacity:
  • If the network type is TCP/IP or RoCE, the memory is 9 GB.
  • If the network type is IB, the memory is 11.5 GB.
When a VBS process is added, the memory requirement also increases. For example, if three VBS processes are deployed on each compute node, the memory must be 27 GB when the RoCE network is used.
Storage node memory capacity = Memory used by the operating system (OS) + Memory used by basic services + Memory used by caches + Memory used by OSD processes, as shown in Table 3-1
Table 3-1  Storage node memory capacity

Requirement

Description

Size

Memory used by the OS

For the memory used by the OS, see the memory requirements in the product documentation of the product in use.

NOTE:

In FusionCompute scenarios, if the memory used by the OS has been reserved, you do not need to consider it.

The default memory is 8 GB.

Memory used by basic services

Memory required by the basic service framework and MDC processes 6 GB

Memory used by caches

No cache 0
Use SSD cards or SSDs.
NOTE:

The unit of the SSD cache is GB.

  • Memory used by replica storage pools = Server SSD cache in GB/128
  • Memory used by EC storage pools = Server SSD cache in GB/128 x 1.15

Memory used by OSD processes

Use HDDs or SAS SSDs as primary storage.

NOTE:

In addition to the calculation principle on the right, you can also quickly query the memory capacity occupied by the OSD process by referring to Table 3-2.

N x Maximum number of disks on the server, where the value of N varies according to the network and disk types:

  • When an TCP/IP or RoCE network is used, the value of N varies according to the capacity of a single disk:
    • Copy storage pool:
      • When the capacity of a copy storage pool is less than or equal to 2 TB, the value of N is 2 GB.
      • When the capacity of a copy storage pool is greater than 2 TB and less than or equal to 4 TB, the value of N is 3 GB.
      • When the capacity of a copy storage pool is greater than 4 TB, the value of N increases by 0.5 GB each time when the capacity of the copy storage pool increases by 2 TB.
    • EC storage pool:
      • When the capacity of an EC storage pool is less than or equal to 4 TB, the value of N is 3.45 GB.
      • When the capacity of a copy storage pool is greater than 4 TB, the value of N increases by 0.575 GB each time when the capacity of the copy storage pool increases by 2 TB.
  • When an IB network is used, the value of N varies according to the capacity of a single disk:
    • Copy storage pool:
      • When the capacity of a copy storage pool is less than or equal to 2 TB, the value of N is 2.4 GB.
      • When the capacity of a copy storage pool is greater than 2 TB and less than or equal to 4 TB, the value of N is 3.4 GB.
      • When the capacity of a copy storage pool is greater than 4 TB, the value of N increases by 0.5 GB each time when the capacity of the copy storage pool increases by 2 TB.
    • EC storage pool:
      • When the capacity of an EC storage pool is less than or equal to 4 TB, the value of N is 3.91 GB.
      • When the capacity of a copy storage pool is greater than 4 TB, the value of N increases by 0.575 GB each time when the capacity of the copy storage pool increases by 2 TB.

Use SSD cards or NVMe SSDs as primary storage.

  • Memory used by OSD processes in the EC storage pools = Memory used by OSD processes in the replica storage pools x 1.15
  • For details about how to calculate the memory used by OSD processes in the replica storage pools, see the right columns.
NOTE:

In addition to the calculation principle on the right, you can also quickly query the memory capacity occupied by the OSD process by referring to Table 3-3.

M x Maximum number of disks on the server x Number of OSDs, where the value of M varies according to split size:

  • For an TCP/IP or RoCE network:
    • When the split size is less than or equal to 2 TB, the value of M is 3.1 GB.
    • When the split size is greater than 2 TB and less than or equal to 4 TB, the value of M is 4.1 GB. When the split size is greater than 4 TB, the value of M increases by 0.5 GB each time when the split size increases by 2 TB. For example, when the split size is greater than 4 TB and less than or equal to 6 TB, the value of M is 4.6 GB. When the split size is greater than 6 TB and less than or equal to 8 TB, the value of M is 5.1 GB.
  • For an IB network:
    • When the split size is less than or equal to 2 TB, the value of M is 3.5 GB.
    • When the split size is greater than 2 TB and less than or equal to 4 TB, the value of M is 4.5 GB. When the split size is greater than 4 TB, the value of M increases by 0.5 GB each time when the split size increases by 2 TB. For example, when the split size is greater than 4 TB and less than or equal to 6 TB, the value of M is 5 GB. When the split size is greater than 6 TB and less than or equal to 8 TB, the value of M is 5.5 GB.

The number of OSDs is the value calculated based on the the following conditions, whichever smaller prevails:

  • SSD device capacity (GB)/Actual capacity of an OSD (600 GB by default). The maximum number of split units of the main storage on a single server is 36.

    If the value of SSD device capacity in GB/Actual split size is not an integer and its decimal part is greater than 0.1, the system remaining capacity equals one split size by default, and the number of split units is the value's integer part plus 1. If the value's decimal part is less than or equal to 0.1, the system remaining capacity is not counted, and the number of split units is the value's integer part. The maximum number of split units of the main storage on a single server is 36.

    For example, if the value of SSD device capacity in GB/Actual split size is 3.2, the number of split units is four. If the value of SSD device capacity in GB/Actual split size is 3.1, the number of split units is three.

  • 36/Maximum number of main storage devices that a user can select on the self-service maintenance platform.

    You can select 12, 16, 24, 36, or keep the default value. If you keep the default value, the system uses the following formula:

    • If the number of main storage devices inserted to each server is 12 or smaller, take the value of 12.
    • If 12 < Number of main storage devices inserted to each server ≤ 16, take the value of 16.
    • If 16 < Number of main storage devices inserted to each server ≤ 24, take the value of 24.
    • If 24 < Number of main storage devices inserted to each server ≤ 36, take the value of 36.
NOTE:

In a TCP/IP separated deployment scenario, use a 2288 V5 (12-slot server) as the storage node and 4 TB SATA disks as the data disks (that is, primary storage), and use a 2.4 TB SSD card as the cache. The memory required by the computing node is 9 GB and that required by the storage node is:

  • If replica storage pools are required:

    8 GB used by the OS + 6 GB used by basic services + 3 GB x 12 used by OSD processes + (2.4 x 1024 GB)/128 used by caches = 69.2 GB

  • If EC storage pools are required:

    8 GB used by the OS + 6 GB used by basic services + [3 GB x 12 used by OSD processes + (2.4 x 1024 GB)/128 used by caches] x 1.15 = 77.48 GB

In the physical deployment scenario, the server that deploys the FSM needs to reserve resources for the FSM. The memory resource requirements for FSM are as follows:
  • If 3 to 64 hosts are deployed, set the memory capacity to 16 GB.
  • If 65 to 4096 hosts are deployed, set the memory capacity to 32 GB.
NOTE:

If the FSM is deployed on an independent physical server, do not deploy the physical server where the FSM is deployed as a storage node.

Converged Deployment Scenario

Server memory capacity = Computing node memory capacity + Storage node memory capacity, where the computing node memory capacity and storage node memory capacity are the same as those in the preceding separated deployment scenario.

In the physical deployment scenario, the server that deploys the FSM needs to reserve resources for the FSM. The memory resources required by the FSM are the same as those in the preceding separated deployment scenario.

Memory Used by OSD Processes

See Table 3-2 and Table 3-3 to quickly find out the memory used by OSD processes.

Table 3-2  Memory used by OSD processes (HDDs or SAS SSDs)

Storage Pool Type

Capacity of a Single Disk (HDD or SAS SSD) Used as Primary Storage

Network Type

Memory Required by a Single Disk

Network Type

Memory Required by a Single Disk

Memory Used by OSD Processes

Replica storage pool

Capacity ≤ 2TB

TCP/IP or RoCE

2.0 GB

IB

2.4 GB

Maximum number of disks on the server x Memory required by a single disk

2 TB < Capacity ≤ 4 TB

3.0 GB

3.4 GB

4 TB < Capacity ≤ 6 TB

3.5 GB

3.9 GB

6 TB < Capacity ≤ 8 TB

4.0 GB

4.4 GB

8 TB < Capacity ≤ 10 TB

4.5 GB

4.9 GB

EC storage pool

Capacity ≤ 4 TB

TCP/IP or RoCE

3.45 GB

IB

3.91 GB

4 TB < Capacity ≤ 6TB

4.03 GB

4.49 GB

6 TB < Capacity ≤ 8 TB

4.60 GB

5.06 GB

8 TB < Capacity ≤ 10 TB

5.18 GB

5.64 GB

Table 3-3  Memory used by OSD processes (SSD cards or NVMe SSDs)

Storage Pool Type

Capacity of a Single SSD Device (SSD Card or NVMe SSD) Used as Primary Storage

Network Type

Memory Used by OSD Processes

Network Type

Memory Used by OSD Processes

12-Slot Server

16-Slot Server Server With 24 or More Slots

12-Slot Server

16-Slot Server Server With 24 or More Slots

Replica storage pool

Capacity ≤ 600 GB

TCP/IP or RoCE

37.2 GB

49.6 GB

Maximum number of disks on the server x 3.10 GB

IB

42 GB

56 GB

Maximum number of disks on the server x 3.50 GB

600 GB < Capacity ≤ 1.2 TB

74.4 GB

99.2 GB

Maximum number of disks on the server x 3.10 GB

84 GB

112 GB

Maximum number of disks on the server x 3.50 GB

1.2 TB < Capacity ≤ 2.0 TB

111.6 GB

99.2 GB

Maximum number of disks on the server x 3.10 GB

126 GB

112 GB

Maximum number of disks on the server x 3.50 GB

2.0 TB < Capacity ≤ 4.0 TB

111.6 GB

99.2 GB

Maximum number of disks on the server x 4.10 GB

126 GB

112 GB

Maximum number of disks on the server x 4.50 GB

4.0 TB < Capacity ≤ 6.0 TB

111.6 GB

99.2 GB

Maximum number of disks on the server x 4.60 GB

126 GB

112 GB

Maximum number of disks on the server x 5.00 GB

Capacity > 6.0 TB

147.6 GB

131.2 GB

Maximum number of disks on the server x 5.10 GB

162 GB

144 GB

Maximum number of disks on the server x 5.50 GB

EC storage pool

Capacity ≤ 600 GB

TCP/IP or RoCE

42.78 GB

57.04 GB

Maximum number of disks on the server x 3.57 GB

IB

48.3 GB

64.4 GB

Maximum number of disks on the server x 4.03 GB

600 GB < Capacity ≤ 1.2 TB

85.56 GB

114.08 GB

Maximum number of disks on the server x 3.57 GB

96.6 GB

128.8 GB

Maximum number of disks on the server x 4.03 GB

1.2 TB < Capacity ≤ 2.0 TB

128.34 GB

114.08 GB

Maximum number of disks on the server x 3.57 GB

144.9 GB

128.8 GB

Maximum number of disks on the server x 4.03 GB

2.0 TB < Capacity ≤ 4.0 TB

128.34 GB

114.08 GB

Maximum number of disks on the server x 4.72 GB

144.9 GB

128.8 GB

Maximum number of disks on the server x 5.18 GB

4.0 TB < Capacity ≤ 6.0 TB

128.34 GB

114.08 GB

Maximum number of disks on the server x 5.29 GB

144.9 GB

128.8 GB

Maximum number of disks on the server x 5.75 GB

Capacity > 6.0 TB

169.74GB

150.88 GB

Maximum number of disks on the server x 5.87 GB

186.3 GB

165.6 GB

Maximum number of disks on the server x 6.33 GB

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Updated: 2019-06-29

Document ID: EDOC1100016637

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