Huawei OceanStor 2000 V3 Series Features Manual page 12

OceanStor V3 Series
HyperMetro Feature Guide for File
HyperMetro tenant pair. If a fault occurs in a HyperMetro tenant pair, ensure the arbitration
results of all file systems in the tenants of the HyperMetro tenant pair are the same and the
environments in which the file systems are running are consistent between the tenants.
Logical Port
Logical ports are created based on physical Ethernet ports, bond ports, or VLANs and used
for file service operation.
Local File System and Remote File System
In a HyperMetro pair, the file system on the local storage array is called local file system and
the file system on the remote storage array is called remote file system.
Dual-Write
Dual-write enables the synchronization of application host I/O requests with both local and
remote file systems.
DCL
DCLs record changes in the data of storage arrays.
Quorum Server
For NAS HyperMetro, if the heartbeats between two storage arrays are interrupted, the
quorum server decides which storage array continues providing services, thereby greatly
improving host service continuity.
HyperMetro Domain
A HyperMetro domain consists of the local storage array, remote storage array, and the
quorum server. Application servers can access data across data centers using a HyperMetro
domain. Before configuring a HyperMetro pair, you must configure the HyperMetro domain
first. Each HyperMetro pair must be created in the HyperMetro domain.
NAS HyperMetro Pair
A NAS HyperMetro pair indicates a HyperMetro relationship between the local and remote
file systems. After HyperMetro is configured, a local file system on the local storage array
and a remote file system on the remote storage array form a NAS HyperMetro pair. By
viewing the state of a HyperMetro pair, you can determine whether you need to perform
synchronization and suspension operations. After performing an operation, you can view the
state of the HyperMetro pair to determine whether the operation succeeded.
Synchronization
Synchronization refers to the synchronization of differential data between a local file system
and a remote file system.
Issue 05 (2018-01-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1 Feature Description
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