Huawei OceanStor V3 Series Features Manual page 82

OceanStor V3 Series
Remote Replication Feature Guide for Block
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Requirement Analysis and Conclusions
The previous requirements indicate that the carrier needs a disaster recovery solution.
4-3
Table 4-3 Criteria for implementing a remote disaster recovery solution
Consideration
Data transfer amount
Host performance
Data availability
Service continuity
Others
The details of the solution are as follows:
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Issue 06 (2018-01-30)
Once a disaster happens, site B takes over services with an RTO no longer than 15
minutes.
Central data management
After a new service site (site C) or more service sites are set up, data from all service
sites is backed up to the backup site for central management, reducing deployment and
maintenance costs.
Data analysis and mining
Service data can be exported for analysis and mining to support policy-making.
lists the criteria for implementing a remote disaster recovery solution.
Data transfer amount
At site A, the daily data change amount is between 100 MB to 200 MB, while the
available bandwidth is only 2 Mbit/s, which is not adequate for the data change amount.
Therefore, the data replication period must be shortened to reduce the amount of data
transferred each time.
Host performance
The carrier requires minimized impact of backup on host performance to ensure host
services run correctly. Multiple service sites may locate in different places and are
comparatively far from the backup site. Therefore, asynchronous remote replication is
suitable for this case. Table 4-4
replication.
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Description
Inter-city data transfer is subject to the bandwidth. The amount
of lost data decreases as the amount of data transferred within a
specified period of time increases.
Data backup affects services on the host. Services on the host
can run properly if the impact of backup on the services is
minor.
Availability of data at the disaster recovery site is significant
for data recovery. Therefore, data at the disaster recovery site
must be available any time.
The disaster recovery site must be able to quickly take over
services at the service site through a service switchover to
protect service continuity.
Other factors to be considered include cost as well as central
data management and analysis.
describes advantages of asynchronous remote
4 Configuration Example
Table
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