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OceanStor BCManager 6.5.0 eReplication User Guide 02

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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).
Network Planning

Network Planning

eReplication supports multiple deployment modes and two DR modes (local and remote DR). This section describes the DR network planning of eReplication.

Deployment Modes

eReplication can be deployed in centralized or distributed mode. The following describes the two deployment modes:
  • Centralized deployment:
    • In single-server deployment mode, the Server is deployed on an independent server at the DR site to provide DR management for production and DR resources. The Server must be able to communicate properly with the production site network.
    • In HA deployment mode, the eReplication Server servers are deployed at the DR site as an HA cluster and use a floating IP address to provide DR services externally. The two Server servers must be able to communicate properly with the production site network.
  • Distributed deployment: The eReplication Server is deployed on the servers at the production site and DR site to provide DR management for site resources. eReplication Server deployed at the production site must communicate properly with eReplication Server deployed at the DR site.
Figure 2-2 and Figure 2-3 show the typical eReplication networks in centralized mode.
Figure 2-2  Typical network in single-server mode
Figure 2-3  Typical network in HA mode

Figure 2-4, Figure 2-5, and Figure 2-6 show the typical networks in distributed mode.

Figure 2-4  Typical network diagram for distributed deployment (host)

Figure 2-5  Typical network diagram for distributed deployment (VM)

Figure 2-6  Typical network diagram for distributed deployment (FusionSphere VM host-based replication)

Table 2-2 describes details about the previous network diagrams.

Table 2-2  Network information

Item

Description

Production storage

All the storage devices connected to the production site.

DR storage

All the storage devices connected to the DR site.

CNA

Computing Node Agents (CNAs) are deployed on physical servers and manage local VMs and corresponding virtual volumes.

vCenter server

Running on Windows-based servers, the vCenter servers provide easy single-node control for data centers, centrally manage VMware ESXi hosts, and offer basic data center services.

ESXi host

ESXi is a virtualization platform, which considers VMs as a group of configurations and disk files. These configurations and files can provide all functions of physical machines. You can use ESXi to run and configure VMs, install the operating system, and run application programs.

ESXi hosts refer to physical machines where ESXi is installed. All VMs are running on hosts.

Management network

The management network includes DR management network and production management network. The two networks may reside on a same network or be separated.
  • DR management network: communication network used by eReplication to provide external services. The maintenance terminal and third-party systems access this network using the management IP address of the DR server.
  • Production management network: communication network used by eReplication storage devices, hosts, FusionManager, FusionCompute, VRGs, and vCenter servers to provide external services. The maintenance terminal and third-party systems access this network using their management IP addresses.

Service network

Communication network that transfers the read and write I/Os between hosts (or VMs) and storage resources.

Replication network

Communication network used by the production site to replicate service data to the DR site. This network includes the host-based replication network and storage-based replication network.

eReplication can be installed on VMs using templates or on physical servers and VMs using software packages.

Deployment Principles

  • Up to two eReplication Servers can be deployed. If only one eReplication Server is available, deploy it at the DR site whose services need to be recovered preferentially. If two eReplication Servers are available, deploy one at the two DR sites respectively. Ensure that the management network between the managed sites and the eReplication Servers is normal.
  • In the geo-redundant DR scenario, three sites, including production site A, DR site B, and DR site C, must be configured. In this scenario, only the following two deployment modes are supported.
    • If two eReplication Servers are deployed, the eReplication Server deployed at site B manages sites A and B, and that deployed at site C manages site C.
    • If only one eReplication Server is available, you are advised to deploy it at the DR site whose services need to be recovered preferentially. The eReplication Server manages sites A, B, and C at the same time.
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Updated: 2019-05-21

Document ID: EDOC1100075861

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