Parameter
Description
Setting
Replication Mode
Data replication mode of a consistency
group. The values include:
l
Synchronous
: When data is written on
a primary resource, the write request is
also sent to the secondary resource.
Only after the data is written on both
the primary and secondary resources
successfully, does the host receive a
successful data write message.
Synchronous mode ensures that the data
on the primary resource and secondary
resource synchronizes in real-time. If
the primary resource is written
successfully, a write success
acknowledgement is returned to the
host.
l
Asynchronous
: When data is written
on a primary resource successfully, the
host receives a successful data write
message. In the meanwhile, the primary
site records the data difference between
the written data and the secondary
resource. In the data synchronization
later, only the different data the primary
site records are synchronized to the
secondary site, reducing the write
latency of application server to the
minimum.
[Default value]
Asynchronous
Recovery Policy
After the remote replication internal I/O
error is rectified or the replication link is
up, the consistency group automatically
synchronizes data or not. The values
include:
l
Manual
: The consistency group enters
the
To be recovered
state. You need to
manually synchronize the data from the
primary resource to the secondary
resource.
l
Automatic
: The consistency group
enters the
Synchronizing
state. The
system will automatically synchronize
the data from the primary resource to
the secondary resource.
[Default value]
Automatic
OceanStor V3 Series
Remote Replication Feature Guide for Block
3 Configuring Remote Replication
Issue 06 (2018-01-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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