FlashGrid SkyCluster offers HA database architecture that allows full control and the flexibility to meet future database and infrastructure requirements:
FlashGrid SkyCluster enables running Oracle RAC in the cloud. Even if you have been using only single-instance databases, consider using the SkyCluster with Oracle RAC to increase database availability and to mitigate the lack of control over the compute and storage resources. Additionally, SkyCluster Launcher fully automates the process of configuring Oracle RAC clusters and allows creating a cluster in AWS or Azure cloud in less than two hours.
Public cloud uptime SLA covers only VM instance uptime. It does not cover software or OS patching, crashes, or corruption. SkyCluster with Oracle RAC provides true database high availability with active-active redundancy between two or more database node VMs. If zero RTO and zero RPO are your targets then you should look at running SkyCluster with Oracle RAC.
Compared to a single-instance database, a RAC database has overhead for communication and data mirroring between the nodes. However, clustering adds CPU, memory, and disk resources that speed up parallel operations. The FlashGrid software itself consumes negligible amount of system resources.
Testing performed at FlashGrid and by our customers demonstrated performance levels matching or exceeding performance of high-end on-premises systems. See Performance Considerations section in the whitepapers for AWS and Azure. FlashGrid engineers can help you analyze your application performance needs and size the database cluster accordingly.
The SkyCluster architecture does not impose strict limits on the number of RAC nodes. In most cases we recommend two or three nodes. To reduce network overhead we recommend increasing the size of the nodes (up to 224 cores) before adding more nodes. 2+2 redundancy across two availability zones may be used for extra HA. Clusters with 4+ nodes are possible for extra-large capacities.
The migration process is similar to migrating a database between two datacenters. Depending on the size of the database and tolerable downtime, you can use one of the regular migration tools, such as RMAN backup/restore, export/import, or DataGuard replication.
Yes. For cloud deployments, in addition to handling problems directly related to the FlashGrid software FlashGrid Technical Support Services cover the entire infrastructure stack.