Billing Method |
- Subscription: A subscription instance is an instance that you can subscribe to for a specific
period and pay for up front. Subscription billing is more cost-effective than pay-as-you-go
billing. Therefore, we recommend that you select subscription billing with a longer
commitment. You can receive larger discounts for longer subscription periods.
- Pay-As-You-Go: A pay-as-you-go instance is charged per hour based on your actual resource usage.
We recommend that you select pay-as-you-go billing for short-term use. If you no longer
require your pay-as-you-go-billed instance, you can release it to reduce costs.
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Restore Mode |
- By Time: allows you to restore data to a point in time within the specified log backup retention
period. For more information about how to view or change the log backup retention
period, see Back up an ApsaraDB RDS for SQL Server instance.
- By Backup Set: allows you to restore data from a specified backup set.
Note
- The By Time option appears only when the log backup function is enabled.
- You can restore some or all the databases on the original RDS instance.
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Database |
Specify whether you want to restore some or all the databases on the original RDS
instance. If you select Part, you must manually enter the names of the databases that you want to restore. In
addition, you must separate the database names with commas (,).
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Edition |
- Basic: The database system consists of only one RDS instance. Computing is separated from
storage to increase cost-effectiveness.
- High-availability: The database system consists of one primary RDS instance and one secondary RDS instance.
These RDS instances work in the high availability architecture.
- AlwaysOn: The database system consists of one primary RDS instance, one secondary RDS instance,
and up to seven read-only RDS instances. You can create read-only RDS instances to
scale up the read capability of the database system.
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Zone of Primary Node and Zone of Secondary Node
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The zone to which the RDS instance belongs. A zone is an independent physical location
within a region. The Zone of Primary Node parameter specifies the zone to which the primary RDS instance belongs. The Zone of Secondary Node parameter specifies the zone to which the secondary RDS instance belongs.
You can select the Single-zone Deployment or Multi-zone Development method.
- Single-zone Deployment: The Zone of Primary Node and the Zone of Secondary Node are the same.
- Multi-zone Deployment: The Zone of Primary Node and the Zone of Secondary Node are different. After you specify the Zone of Primary Node, the system automatically allocates the Zone of Secondary Node.
The multi-zone deployment method provides zone-level disaster recovery. We recommend
that you select the multi-zone deployment method.
Note
- After the RDS instance is created, you can view information about the RDS instance
and its secondary RDS instance on the Service Availability page.
- If you select the RDS Basic Edition, the database system consists of only one RDS
instance and supports only the single-zone deployment method.
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Instance Type |
- Entry-level: belongs to the general-purpose instance family. A general-purpose instance exclusively
occupies the allocated memory and I/O resources. However, it shares CPU and storage
resources with the other general-purpose RDS instances that are deployed on the same
server.
- Enterprise-level: belongs to the dedicated instance family. A dedicated instance exclusively occupies
the allocated CPU, memory, storage, and I/O resources. The top configuration of the
dedicated instance family is the dedicated host instance family. A dedicated host
instance exclusively occupies all the CPU, memory, storage, and I/O resources of the
server where it is deployed.
Note Each instance type supports a specific number of CPU cores, memory capacity, maximum
number of connections, and maximum IOPS. For more information, see Primary instance types.
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Capacity |
The storage capacity that the RDS instance has available to store data files, system
files, binary log files, and transaction files. The storage capacity increases in
increments of 5 GB.
Note The dedicated instance family supports exclusive allocations of resources. Therefore,
the storage capacity of each instance type with local SSDs in this family is fixed.
For more information, see Primary instance types.
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