Oracle rac private interconnect network best practices 19c - STOP ORACLE RAC (11g) 1.

 
When you create an IPSec VPN connection, Oracle provides the public IP addresses for two tunnel endpoints in. . Oracle rac private interconnect network best practices 19c

Use a Server Parameter File (SPFILE) 9-1 Enable Archive Log Mode and Forced Logging 9-1 Configure an Alternate Local Archiving. Oracle starts with the world&x27;s most complete, open. I have also configured acfs, used for archived redo logs and DIRECTORY objects. Oracle RAC requires network configuration of SCAN IPs, VIP IPs, interconnect, and other items. 3 Supported Storage Options for Oracle Database and Recovery Files 1-5 1. primary or standby databases are not symmetrical Real Application Clusters (e. In addition, by using a private interconnect network, there is not the requirement to encrypt that Cache Fusion traffic. 15 Tune and Troubleshoot Oracle Data Guard. Oracle recommends that you set the interface for Oracle Real Application Clusters (Oracle RAC) communication in the Oracle Cluster Registry (OCR). zip Database LINUX. This document discusses choices and. This post assumes that both the providing and receiving databases are enabled with TLS. Figure 1-2 shows an Oracle ASM cluster in an Oracle RAC environment where Oracle ASM provides a clustered pool of storage. Oracle continues to raise the bar with Oracle Database 19c with extensive support for consolidation. Provides an overview of Oracle Real Application Clusters (Oracle RAC) installation and administration, and various components and functions. The advantages of using Oracle RAC on extended clusters include - Ability to fully use all system resources without jeopardizing the overall failover times for instance and node failures. Add a new network interface to the clusterinterconnect. srvctl stop nodeapps -n racnode1 -f 7. By default, both iptables and firewalld are not running on Oracle Database Appliance. This requirement also applies. Oracle Database 19c is the latest and most advanced version of Oracle&x27;s flagship product. Access to this network is typically controlled by the vendor&x27;s software. The voting disk and OCR location, as well as all the database files, need to be on shared storage for RAC to function properly. This NVD validates the VLANs on the Nutanix cluster, adds those VLANs to NDB, and enables NDB IP address management. connected to the public network virtual switch (Oracle Public), and a second IP address is for the private cluster interconnects connected to the private network virtual switch (Oracle Private). The interconnect network is a private network that connects all of the servers in the cluster. 255, and your private addresses must be in the range of 192. Btw, to change from bonded IB to individual IB ports in Exa, you run gridexadb01 oifcfg setif -global ib0192. The same functionality and principles you use to manage Oracle RAC databases are applied to the management of applications. We need to plan private and public networks for RAC containers before starting the installation. Release 19 Grid Infrastructure Installation and Upgrade Guide for IBM AIX on POWER Systems (64-Bit) 4 Configuring Networks for Oracle Grid Infrastructure and Oracle RAC Check that you have the networking hardware and internet protocol (IP) addresses required for an Oracle Grid Infrastructure for a cluster installation. az vm image list --publisher oracle --output table -all. Administrator&x27;s Reference for Linux and Unix-Based Operating Systems. Oracle Database - Enterprise Edition - Version 11. 2, Oracle introduced the High Availability IP (HAIP) feature for supporting IP address failover. Oracle Database 11g Transient Logical Standby Shell script available via MetaLink Note 949322. It is less common to employ Jumbo Frames for the public network interfaces. By default, the LREG discovery routine is started every 60 seconds. In fact, these features benefit immensely when used with Oracle RAC. 5 Configuring Networks for Oracle Grid Infrastructure and Oracle RAC. Use Oracle Enterprise Manager to administer your entire Oracle RAC environment, not just the Oracle RAC database. ) Run a heavy load against the RAC database and see how the work gets spread across the nodes. Oracle RAC 19c Best Practices and Secret Internals Anil Nair. Elastic Compute Latest Generation Intel Xeon Processors Up to 1,600 Database Server Cores Up to 44 TB of DDR4 DRAM Scalable Storage Up to 2. Network Interface Configuration Options. Configures the OS firewall, DB listeners, and the OCI VCN for port 2484. This solution playbook describes how to set up a two-node Oracle RAC database including Two VM instances (cluster nodes) in the same public subnet in a virtual cloud network (VCN) We walkthrough the end-to-end process to deploy Oracle RAC 19C or 21C in a few hours using Oracle Grid Infrastructure and database software on Private Cloud. Oracle RAC messages directly over the RoCE network, which considerably improves OLTP response time and scalability in Exadata. Best Practices and Recommendations for RAC databases with SGA size over 100GB Best Practices and Recommendations for RAC databases with SGA size. Oracle 9i , 10g , 11g ,12c ,19c RAC DG PT. Each cluster node must have an interface that you identify during installation as a private interface. The Interconnect is designed to carry the communication between the nodes in the Cluster needed to check for the Clusters condition and to synchronize the various memory caches used by the database. 1) Last updated on SEPTEMBER 14, 2022 Applies to Oracle Database Backup Service - Version NA and later Oracle Database Cloud Schema Service - Version NA and later. Multiple Oracle RAC Clusters can be deployed on a single Docker host. This article assumes that you have already set up two separate servers for RAC installation. This requirement also applies to all Exadata systems that are running Linux kernel 2. When configuring Ethernet switches for your cluster private interconnect, disable the spanning tree algorithm on ports that are used for the interconnect. We would set this clusterinterconnects parameter to define multiple private networks to be used by the RAC database. That is, draining and rebalancing of work as maintenance progresses. The public IPs and the private IPs must all be pingable prior to the installation. Cluster member node interfaces can be configured to use IPv4, IPv6, or both types of Internet protocol addresses. 9 using VirtualBox. You can run this command from a Virtual Network Computing (VNC) session, or Terminal Services in console mode. Learn about the monitoring capabilities of Oracle Enterprise Manager, including the Cluster Database Homepage, the Interconnects page, and the Cluster Database Performance page. Each node must have at least two network adapters or network interface cards (NICs) one for the public network interface, and one for the private network interface, or the interconnect. 5 PB Database Size (Triple-mirrored, Without Compression). The precise configuration you choose for your network depends on the size and use of the cluster you want to configure, and the level of availability you require. sh Script 3-21. To maximize your speed and efficiency on the interconnect, . Because the current NIC&x27;s capacity is 4G. Node Name. Configures the OS firewall, DB listeners, and the OCI VCN for port 2484. Then choose Oracle Database , 19. Next, you should customize them by reconfiguring for more memory and space for Oracle software installation. crsctl stop crs rootdbhost1 bin. cluster wait events Guess2 Dec 3 2009 edited Dec 3 2009 10. HTML PDF Show Details. In addition to the public network, Oracle RAC requires private network connectivity that is used exclusively for. The RAC interconnect is a very important part of the cluster environment it is on of the aortas of a cluster environment. The private network provides interconnect communication between all the . An important summary section in the AWR report is the Interconnect Ping Latency section. Customers can access the connection by using either Oracle FastConnect or Microsoft ExpressRoute, and they. For more information on Oracle HAIP, please refer to Oracle metalink note 1210883. Oracle (Active) Data Guard 19c - Best Practices for a Selection of New Features Keywords Oracle, Oracle Corporation, Markus. 2 Server Hardware and Software Review Checklist for Oracle RAC Installation 1-2 1. Select Create a network with bondsports only and click Next. If you configure addresses using a DNS, then you should ensure that the private IP addresses are reachable only by the cluster nodes. Configures the OS firewall, DB listeners, and the OCI VCN for port 2484. 5 Configuring Networks for Oracle Grid Infrastructure and Oracle RAC. 16), Oracle RAC is supported on Podman containers for production. and one for the private network interface, or the interconnect. KunLun Mission Critical Server Oracle Database Oracle 12c R1 (RAC) Best Practice 02. I ran runcluvfy pre crsinst, it gave me warning as follows Could not find a suitable set of interfaces for the private interconnect. The installer enables Redundant Interconnect Usage to provide a high availability private network. Private Network for Each Node Private networks (also called interconnects) are networks that only cluster member nodes can access. The MAA Scorecard provides a set of best practices for maximum availability architecture. Grid LINUX. Oracle 9i , 10g , 11g ,12c ,19c RAC DG PT. This paper discusses various Oracle RAC deployment scenarios and provides best practices for an optimized Oracle RAC deployment on Oracle VM environments for Oracle VM versions 3. Download PDF chapters Introduction 1 Business case 2 Document purpose 3 Audience 4 Deployment workflow 5. All Oracle private interconnect IP addresses and interface names were registered in the etchosts file of each Oracle RAC database node. Oracle RAC provides the foundation for enterprise grid computing. Incorrect shared disk configuration. Database Practices Db 19c Oracle FLEXCUBE Universal Banking Release 14. Oracle RAC 12c Collaborate Best Practices - IOUG 2014 version - Download as a PDF or view online for free. Oracle does not support. Cluster Detection and Node Selection when Using DBCA3-10. Oracle RAC 19c. The interconnect is used to transfer data and messages among the instances. Configure a second interconnect for redundancy to avoid making the interconnect a potential single point of failure. Oracle RAC . With Oracle Linux kernel 2. Oracle&x27;s RAC is heavily dependent on an efficient, high reliable high-speed private network called the interconnect, make sure when designing a RAC system that you get the best that you can afford. The Oracle RAC family of solutions Oracle Clusterware Oracle Clusterware is the technology that transforms a server farm into a cluster. VLAN2 - mini subnet - Private Interconnect for SID2. Figure 1. As per best practices, the 2 VM&x27;s, &x27;rac01-g6&x27; and &x27;rac02-g6&x27; , part of the 2 node Oracle RAC setup was deployed from a template &x27;Template-12crac&x27;. Is there any limit to how many redundant interconnect NICs that can be used by clusterware Yes. 32 (Doc ID 1286796. Design GuideOracle RAC Database on PowerStore T Storage. 0, then your private network is in the range 192. Each of instance is connected to other instance using a high-speed interconnect. During Clusterware installation, the information you enter as the private IP address determines which private interconnects are used by Clusterware for its own communication. sh to configure the Yum repositories and install the OS packages needed for the RAC node. It discusses the public and private interconnect network and shared storage. 32, a bug has been fixed in the Reverse Path Filtering. Add your perspective Help others by sharing more (125 characters min. An Oracle RAC cluster requires a high-bandwidth solution with low latency wherever possible. High private network latency between RAC nodes causing frequent gc related waits leading to performance issues. 0 from Red Hat Reference Architecture Series. Each node&x27;s private interface for interconnects must be on the same subnet. - Private Interconnect Network Heartbeat - Voting Disk based communication Disk Heartbeat Evicts (forcibly removes nodes from a cluster) nodes dependent on heartbeat feedback (failures) CSSDCSSD "Ping" "Ping" Oracle Clusterware. -node nodename The name of the Oracle Clusterware node as listed in the output from the olsnodes command. FlashGrid Cluster virtual appliances enable running self-managed Oracle Real Application Cluster (RAC) and Oracle RAC extended clusters (across different AZs) on Amazon EC2. RAC equally different from a typical single node Oracle Server. Part IV Oracle Data Guard Best Practices. Part VII Continuous Availability for. In Oracle ASM 19c there is only one configuration option, that is Flex ASM, Flex ASM can have a variety of placements for the ASM instances in the. In addition, you need to understand networking components such as network cards, network IP addresses, network bonding, and cluster interconnects. High-bandwidth network interconnect provides less than 100-s. This article assumes that you have already set up two separate servers for RAC installation. Network Requirements for Redundant Interconnect Usage Clusters. The reason strict mode is the default is to prevent IP spoofing from Distributed Denial-of-service (DDos) attacks. Several issues should be considered about the storage subsystem before you configure Oracle Automatic Storage Management (Oracle ASM). Estd Interconnect traffic (KB) 17,642. 3 Solaris 5. Overview of Oracle RAC Architecture and Processing 1-17 Understanding Cluster-Aware Storage Solutions 1-17 Oracle RAC and Network Connectivity 1-18 Overview of Using Dynamic Database Services to Connect to Oracle Databases 1-18 Overview of Virtual IP Addresses 1-19 Restricted Service Registration in Oracle RAC 1-20 iii. If you just want to change ip without changing subnet and interface you can do that at OS level without any changes at Clusterware level. Non-cluster Oracle databases have a one-to-one relationship between the Oracle database and the instance. Oracle on Azure High Level Diagram. Parent topic Understanding Network Addresses. However, having strict mode enabled on the private interconnect of an Oracle RAC database cluster may cause disruption of interconnect communication. The following are notes on storage provisioning from Volumes Block Storage to Oracle Oracle RAC requires you to attach the shared disks to both Oracle RAC nodes. As the nodes tend to send. Oracle Database 19c is the long-term support release and the latest generation of the world&x27;s most popular database. Oracle recommends that you complete these good practices guidelines for updating Oracle Database. Selecting Server Pool Option with DBCA3-11. Step 2 Configure the Proxies in the Oracle Database Firewall Console. The goal of the Oracle Real Application Clusters (RAC) series of Best Practice and Starter Kit notes is to provide customers with quick knowledge transfer of generic and platform specific best practices for implementing, upgrading and maintaining an Oracle RAC system. Also, the Oracle Enterprise Manager Cluster Database Performance page provides a quick glimpse of the performance statistics for a database. 255, and your private addresses must be in the range of 192. when using TAC or AC for an indication of how well your application follows this practice. 0 from Red Hat Reference Architecture Series. The solution incorporates Dell EMC PowerEdge servers and VMware vSphere virtualization. The interconnect is used to transfer data and messages among the instances. For this reason, cluster member nodes require at least two network interface cards one for a public network and one for a private network. The distance between the sites is 55 kms. ora file is located in the Gridhome networkadmin directory. To enable this, you must configure the operating system-provided failover mechanism. Oracle tuning our RAC but does play a crucial role in helping us decide how we should caller instance number0x1, cluster incarnation number0x8, request identifier0x22fffba. As per the document, Two subnets were used for the inter-connectivity. The column labeled Types shows the Oracle RAC databases using the entry Cluster Database. Planning for VIP changes. Protocol Each public interface must support TCPIP. Private network hardware for the interconnect. Client Release Notes for IBM Linux on POWER Little Endian Systems. In 11. For the private network, the network adapters must use high-speed network adapters and switches that support UDP, TCPIP (minimum requirement is 1 Gigabit Ethernet, 10GbE recommended). The interconnect network is a private network using a switch (or multiple switches) that only the nodes in the cluster can access. 2) database registered with Oracle Clusterware 19c, then perform one of the following steps. (handles to private SQL areas) a session can have at once. Oracle does not support. Missing prerequisites. The private network is used for intercommunication between RAC nodes and transfer of IO blocks. Oracle RAC 19c Best Practices and Secret Internals. Oracle RAC and Oracle Automatic Storage Management (Oracle ASM) instances use these interface addresses to ensure highly available, load-balanced interface. Oracle RAC and Oracle Automatic Storage Management (Oracle ASM) instances use these interface addresses to ensure highly available, load-balanced interface communication between nodes. 4 WHITE PAPER Best Practices for Gathering Optimizer Statistics with Oracle Database 19c HOW TO GATHER STATISTICS Strategy The preferred method for gathering statistics in Oracle is to use the automatic statistics gathering. Each node must have at least two network adapters or network interface cards (NICs) one for the public network interface, and one for the private network interface, or the interconnect. As a consequence of this correction, Oracle RAC systems that use multiple NICs for the private interconnect now require specific settings for the rpfilter parameter. Cluster Detection and Node Selection when Using DBCA3-10. Manuel add and test vip,rac,scan and private ip. Private Interconnect. Step 3 Test the Audit Reports to Ensure That They Can Collect Oracle RAC Node Data. A working knowledge of Oracle RAC Database, Linux, VMware, Storage technology, and Network is assumed but is not a prerequisite to read this document. If the appliance is a high-availability system, then the Browser User Interface helps you create the network for both nodes at the same time. In our case we will change the private interface name from eth7 to eth8(after confirmation from network team). Run SQL with Oracle Live SQL. srvctl stop asm -n racnode2 -f 6. Oracle Flex ASM Network Hardware. If you configure addresses using a DNS, then you should ensure that the private IP addresses are reachable only by the cluster nodes. For example, if you have a two-node cluster, and PrivNIC is the private network connection name for node1 , then PrivNIC must be the private network connection name for node2. Interconnect network is a critical component in a RAC environment. When working with Oracle RAC, its strongly advised to use Jumbo Frames for the network that provides the interconnect between nodes. Oracle recommends that you configure interconnects using Redundant Interconnect Usage, in which multiple network adapters are configured with addresses in the link-local range to provide. If you configure addresses using a DNS, then you should ensure that the private IP addresses are reachable only by the cluster nodes. recent treasury auction results, erotic massage parlour

Best Practices for Oracle RAC interconnect (1) For the private network 10 Gigabit Ethernet is highly recommended, the minimum requirement is 1 Gigabit Ethernet. . Oracle rac private interconnect network best practices 19c

Oracle RAC messages directly over the RoCE network, which considerably improves OLTP response time and scalability in Exadata. . Oracle rac private interconnect network best practices 19c mhge3lla

Part II Oracle Data Access. Step 3 Test the Audit Reports to Ensure That They Can Collect Oracle RAC Node Data. Oracle Real Application Clusters (RAC) is a cluster database with a shared cache architecture that overcomes the limitations of traditional shared-nothing and shared-disk approaches to provide a highly scalable and available database solution for all business applications. A reference Oracle database home, which is a database Oracle Home already patched to the desired patch level. 1, Programmer Sought, the best programmer technical posts sharing site. 31, which also includes Oracle Unbreakable Enterprise Kernel 2. Oracle (Active) Data Guard 19c - Best Practices for a Selection of New Features Keywords Oracle, Oracle Corporation, Markus. Swonger Vice President Database Upgrade and Utilities RoyFSwonger. Best Practices for Oracle RAC interconnect (1) For the private network 10 Gigabit Ethernet is highly recommended, the minimum requirement is 1 Gigabit Ethernet. This is accomplished via Oracle&x27;s Redundant Interconnect, also known as Highly Available Internet Protocol (HAIP), that allows the Oracle Grid Infrastructure to activate and load balance traffic on up to four Ethernet devices for private. Hi all A few time ago I passed by some performance issues on AIX working with instances with different configuration (procmem). As part of the upgrade to Database 19c, you will convert your EBS database to the CDB architecture with a single pluggable database (PDB). ) Cancel. Perform the following steps Click the Networking tab, and then click the Networks subtab. 3 IPs for SCAN listener. It covers topics such as how to perform an initial program load (IPL), how to use disk management functions, how to troubleshoot user IDs and passwords, and how to use the ProLE Service. 32 and above. This white paper provides an overview of Oracle Database 19c, its architecture, components, and benefits. Provides an overview of Oracle Real Application Clusters (Oracle RAC) installation and administration, and various components and functions. 15) was completed, an upgrade to 19c RAC database using the Oracle Database. For public and VIP interfaces in Oracle RAC, I will have add the second InfiniBand listener apart from the 10Gbe listener. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. For this reason, the study used HiperSockets on IBM System z. Release 19 Grid Infrastructure Installation and Upgrade Guide for Linux Multiple Private Interconnects and Oracle Linux Review this information for settings for the rpfilter parameter for Oracle RAC systems that use multiple NICs for the private interconnect. Several issues should be considered about the storage subsystem before you configure Oracle Automatic Storage Management (Oracle ASM). The interconnect is used as physical layer between the cluster nodes to perform heartbeats as well as the cache fusion is using it. In 11. please refer to the product specific database best practice document as well. If you configure addresses using a DNS, then you should ensure that the private IP addresses are reachable only by the cluster nodes. Start the Oracle Grid Infrastructure Setup Wizard by running the following command Gridhome&92;setup. The Oracle RAC 19c software includes Oracle Clusterware and ASM 19c and Oracle Database 19c. Figure 1. Oracle recommends that you complete these good practices guidelines for updating Oracle Database. the Oracle private network design is configured with dedicated VLAN networks . Upgrading PDBs in Parallel on the Same System. This topic describes how to manually determine if Oracle RAC instances are using the private network. Oracle Database 19c. This presentation is based on Lawrence To&x27;s Maximum Availability Architecture (MAA) Oracle Open World Presentation talking about the latest updates on high availability (HA) best practices across multiple architectures, features and products in Oracle Database 19c. Oracle Certified Professional, Oracle Database 19c RAC, ASM, and Grid Infrastructure Administrator Format Multiple-Choice Duration 120 Minutes Buy Exam Number of. Oracle RAC requires a minimum of one private IP address on each node for Oracle Clusterware heartbeat. Therefore, it is necessary for the users oracle and root to have user equivalence, or the ability to use ssh to move from one node to another without authenticating with passwords or passphrases. For more information about Oracle (NYSEORCL), visit oracle. Oracle recommends that you configure interconnects using Redundant Interconnect Usage, in which multiple network adapters are configured with addresses in the link-local range to provide. For Oracle and later versions, you must use UDP IPC for the. Private interfaces must have addresses configured for the interface itself, but no additional configuration is required. Selecting Server Pool Option with DBCA3-11. Elastic Compute Latest Generation Intel Xeon Processors Up to 1,600 Database Server Cores Up to 44 TB of DDR4 DRAM Scalable Storage Up to 2. During installation, you designate interfaces for use as public, private, or Oracle ASM interfaces. What are the IP requirements for the private interconnect. Blocks are received after 2 or 3 network hops immediately. This blog article provides a consolidated view of these updates. 1 comment. Restarting Resources. 2), or later), by default, uses the HAIP address of the interfaces designated with the private role as the HAIP address for all of its traffic, enabling load balancing across the provided set of cluster interconnect interfaces. This guide describes best practices for designing and implementing a virtualized Oracle RAC database solution using Dell EMC PowerStore T storage. In the case of subpar performance in an. Oracle RAC 19c Best Practices and Secret Internals. Whats the fine print. The RAC interconnect is a very important part of the cluster environment it is on of the aortas of a cluster environment. Oracle database services and products offer customers cost-optimized and high-performance versions of Oracle Database, the world&x27;s leading converged, multi-model database management system, as well as in-memory, NoSQL and MySQL databases. and one for the private network interface, or the interconnect. For Oracle RAC configuration on Cisco Unified Computing System, we recommend keeping all private interconnects network traffic local on a single Fabric interconnect. Restart Clusterware stack. ) NOTE The information in the following matrix applies to all UNIX platforms unless otherwise stated in the platform specific section. Enable FAN with Oracle Connection Pools or Connection tests (or both). Best Practices for Oracle RAC interconnect (1) For the private network 10 Gigabit Ethernet is highly recommended, the minimum requirement is 1 Gigabit Ethernet. Alternatively, use InfiniBand for the interconnect. It offers many new features and enhancements to improve performance, security, availability, and manageability. 1 Veritas ActivePassive cluster. Configure the jumbo frame on L3 switch for Oracle RAC Interconnect VLAN port only. Commodity hardware, such as blade servers, and commodity OS, such as Linux offer the most compelling cost benefits for Grids. 4 on VMware. Oracle Database High Availability Overview and Best Practices describes how to select the most suitable architecture for your. The cluster interconnect is also available to applications, for highly available communication between nodes. The deck has been updated with the latest information regarding ORAchk as well as upgrade tips & tricks. Each node has two spare network interfaces to be used as private interconnects, also known as transports, and at least one network interface that is. Planning for VIP changes. Running two RAC systems on one PC can be hard work. Oracle tuning our RAC but does play a crucial role in helping us decide how we should caller instance number0x1, cluster incarnation number0x8, request identifier0x22fffba. This topic describes how to manually determine if Oracle RAC instances are using the private network. -> Ping latency of the roundtrip of a message from this instance to -> target in. It also includes all packages listed in the documentation, even though some are already installed by the preinstall package. 5 (running kernel is 2. It can. Database 12c configuration best practices to automatically transition application connections from a failed primary database to a new primary database after a Data Guard Active Data Guard role transition has occurred. 1 Veritas ActivePassive cluster. The advantage of Oracle RAC is that resources on both nodes are used by the database, and each node uses its own memory and CPU. Last Updated 20-Feb-2012 Purpose The purpose of this note is to make DBAs and System Administrators familiar with the concept of the cluster or private interconnect and its usage in Oracle Clusterware and Oracle Real Application Clusters Scope The main audience is DBAs and System Administrators. Configure Shared Storage for the Oracle RAC Database3-9. Without these rpfilter parameter settings systems, interconnect packets can. Primary database Instance failover improved by 10x Leverage all allocated capacity means reduced CAPEX Oracle 19c RAC features addressing our. The goal of the Oracle Real Application Clusters (RAC) series of Best Practice and Starter Kit notes is to provide customers with quick knowledge transfer of generic and platform specific best practices for implementing, upgrading and maintaining an Oracle RAC system. Part VI Oracle Database Administration and Application Development. Private Interconnect - RAC. Database 12c configuration best practices to automatically transition application connections from a failed primary database to a new primary database after a Data Guard Active Data Guard role transition has occurred. 0, then your private network is in the range 192. Oracle RAC and Oracle Automatic Storage Management (Oracle ASM) instances use these interface addresses to ensure highly available, load-balanced interface. . grass valley craigslist