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Merge pull request #248489 from jjaygbay1/fix-issues-august-23
closed multiple customer reported issues
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articles/virtual-machines/workloads/oracle/oracle-overview.md

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We recommend placing the VMs in the same availability set to allow Azure to place them into separate fault domains and upgrade domains. If you want to have geo-redundancy, set up the two databases to replicate between two different regions and connect the two instances with a VPN Gateway. To walk through the basic setup procedure on Azure, see Implement Oracle Data Guard on an Azure Linux virtual machine.
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With Oracle Data Guard, you can achieve high availability with a primary database in one VM, a secondary (standby) database in another VM, and one-way replication set up between them. The result is read access to the copy of the database. With Oracle GoldenGate, you can configure bi-directional replication between the two databases. To learn how to set up a high-availability solution for your databases using these tools, see Active Data Guard and GoldenGate. If you need read-write access to the copy of the database, you can use Oracle Active Data Guard.
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With Oracle Active Data Guard, you can achieve high availability with a primary database in one VM, a secondary (standby) database in another VM, and one-way replication set up between them. The result is read access to the copy of the database. With Oracle GoldenGate, you can configure bi-directional replication between the two databases. To learn how to set up a high-availability solution for your databases using these tools, see [Active Data Guard and GoldenGate](https://www.oracle.com/docs/tech/database/oow14-con7715-adg-gg-bestpractices.pdf). If you need read-write access to the copy of the database, you can use Oracle Active Data Guard.
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To walk through the basic setup procedure on Azure, see [Implement Oracle Golden Gate on an Azure Linux VM](configure-oracle-golden-gate.md).
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In addition to having a high availability and disaster recovery solution architected in Azure, you should have a backup strategy in place to restore your database.
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- Using [Azure backup](oracle-database-backup-azure-backup.md)
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- Using [Oracle RMAN Streaming data](oracle-rman-streaming-backup.md) backup
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## Deploy Oracle applications on Azure
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Use Terraform templates to set up Azure infrastructure and install Oracle applications. For more information, see [Terraform on Azure](/azure/developer/terraform).
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Use Terraform templates, AZ CLI, or the Azure Portal to set up Azure infrastructure and install Oracle applications. You also use Ansible to configure DB inside the VM. For more information, see [Terraform on Azure](/azure/developer/terraform).
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Oracle has certified the following applications to run in Azure when connecting to an Oracle database by using the Azure with Oracle Cloud interconnect solution:
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- E-Business Suite
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According to Oracle Support, JD Edwards EnterpriseOne versions 9.2 and above are supported on any public cloud offering that meets their specific Minimum Technical Requirements (MTR). You need to create custom images that meet their MTR specifications for operating system and software application compatibility. For more information, see [Doc ID 2178595.1](https://support.oracle.com/knowledge/JD%20Edwards%20EnterpriseOne/2178595_1.html).
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## Licensing
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Deployment of Oracle solutions in Azure is based on a bring-your-own-license model. This model assumes that you have licenses to use Oracle software and that you have a current support agreement in place with Oracle.
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Microsoft Azure is an authorized cloud environment for running Oracle Database. The Oracle Core Factor table isn't applicable when licensing Oracle databases in the cloud. Instead, when using VMs with Hyper-Threading Technology enabled for Enterprise Edition databases, count two vCPUs as equivalent to one Oracle Processor license if hyperthreading is enabled, as stated in the policy document. The policy details can be found at [Licensing Oracle Software in the Cloud Computing Environment](https://www.oracle.com/us/corporate/pricing/cloud-licensing-070579.pdf).
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Microsoft Azure is an authorized cloud environment for running Oracle Database. The Oracle Core Factor table isn't applicable when licensing Oracle databases in the cloud. For more information, see [Oracle Processor Core Factor Table](https://www.oracle.com/us/corporate/contracts/processor-core-factor-table-070634.pdf). Instead, when using VMs with Hyper-Threading Technology enabled for Enterprise Edition databases, count two vCPUs as equivalent to one Oracle Processor license if hyperthreading is enabled, as stated in the policy document. The policy details can be found at [Licensing Oracle Software in the Cloud Computing Environment](https://www.oracle.com/us/corporate/pricing/cloud-licensing-070579.pdf).
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Oracle databases generally require higher memory and I/O. For this reason, we recommend [Memory Optimized VMs](/azure/virtual-machines/sizes-memory) for these workloads. To optimize your workloads further, we recommend [Constrained Core vCPUs](/azure/virtual-machines/constrained-vcpu) for Oracle Database workloads that require high memory, storage, and I/O bandwidth, but not a high core count.
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When you migrate Oracle software and workloads from on-premises to Microsoft Azure, Oracle provides license mobility as stated in [Oracle and Microsoft Strategic Partnership FAQ](https://www.oracle.com/cloud/azure/interconnect/faq/).
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