After you attach and connect a volume to an instance, you can use the volume like a regular hard drive. With block storage volumes, you can create, attach, connect, and move storage volumes, and change volume performance to meet your storage, performance, and application requirements. The internet gateway allows traffic between the public subnets in a VCN and the public internet. These rules must be added to enable features such as remote desktop connectivity, access to the SQL Server database, and access for the Always On availability groups endpoints. This architecture needs ingress and egress rules in the security lists attached to the bastion host, quorum witness server, database server, and domain controller subnets. Virtual route tables contain rules to route traffic from subnets to destinations outside a VCN, typically through gateways.įor each subnet, you can create security rules that specify the source, destination, and type of traffic that must be allowed in and out of the subnet. This architecture uses different subnets to host the bastion host, quorum witness server, database server, and domain controllers. Both regional subnets and availability domain-specific subnets can coexist in the same VCN. You can segment VCNs into subnets, which can be scoped to a region or to an availability domain. Like traditional data center networks, VCNs give you complete control over your network environment. Virtual cloud network (VCN) and subnetsĪ VCN is a customizable, private network that you set up in an Oracle Cloud.When you distribute resources across multiple fault domains, your applications can tolerate physical server failure, system maintenance, and power failures inside a fault domain. Each availability domain has three fault domains with independent power and hardware. So, a failure at one availability domain is unlikely to affect the other availability domains in the region.Ī fault domain is a grouping of hardware and infrastructure within an availability domain. Availability domains don’t share infrastructure such as power or cooling, or the internal availability domain network. The physical resources in each availability domain are isolated from the resources in the other availability domains, which provides fault tolerance.
Regions are independent of other regions, and vast distances can separate them (across countries or even continents).Īvailability domains are standalone, independent data centers within a region. Infrastructure region is a localized geographic area that contains one or more data centers, called availability domains.
The architecture has the following components: Description of the illustration microsoft-sql-server-oci.png
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