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Oracle Oracle real Application Clusters

Oracle Database 12c unencumber 2 precise application Clusters guide: concepts, Administration, Tuning & Troubleshooting | real Questions and Pass4sure dumps

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Oracle Clusterware and Oracle legal software Clusters | real Questions and Pass4sure dumps

This chapter introduces Oracle Clusterware and Oracle actual software Clusters (Oracle RAC) by describing these products as well as a route to deploy, administer, and installation them. This chapter describes Oracle Clusterware and Oracle RAC architectures as well because the utility and hardware add-ons for each of these items. This chapter additionally in brief describes workload management, features, and elevated availability for both single-instance Oracle databases and Oracle RAC environments. This chapter includes here topics:

Oracle Clusterware and Oracle actual application Clusters

A cluster comprises diverse interconnected computers or servers that materialize dote they are one server to conclusion users and purposes. Oracle Database 10g legal software Clusters (Oracle RAC) allows the clustering of the Oracle Database. Oracle RAC makes employ of Oracle Clusterware for the infrastructure to bind multiple servers so that they role as a separate device.

Oracle Clusterware is a conveyable cluster administration solution that's built-in with the Oracle database. The Oracle Clusterware is additionally a required fraction for the usage of Oracle RAC. in addition, Oracle Clusterware permits each single-illustration Oracle databases and Oracle RAC databases to merit employ of the Oracle extreme availability infrastructure. The Oracle Clusterware allows for you to create a clustered pool of storage to breathe used by route of any compund of single-instance and Oracle RAC databases.

Oracle Clusterware is the only clusterware that you want for many structures on which Oracle RAC operates. that you can additionally employ clusterware from different vendors if the clusterware is licensed for Oracle RAC.

Single-example Oracle databases occupy a one-to-one relationship between the Oracle database and the illustration. Oracle RAC environments, however, occupy a one-to-many relationship between the database and instances. In Oracle RAC environments, the cluster database circumstances access one database. The combined processing dash of the sunder servers can deliver improved throughput and scalability than is obtainable from a separate server. Oracle RAC is the Oracle Database alternative that gives a separate tackle image for varied servers to access one Oracle database. In Oracle RAC, each Oracle illustration always runs on a sunder server.

Oracle RAC is a unique technology that provides elevated availability and scalability for every utility kinds. The Oracle RAC infrastructure is additionally a key constituent for enforcing the Oracle traffic grid computing architecture. Having distinctive circumstances entry a separate database prevents the server from being a separate point of failure. Oracle RAC enables you to mingle smaller commodity servers privilege into a cluster to create scalable environments that hearten mission critical enterprise functions. applications that you just deploy on Oracle RAC databases can role without code adjustments.

The Oracle Clusterware structure and Oracle Clusterware Processing

The Oracle Clusterware is utility that after installed on servers operating the equal operating device, allows the servers to breathe inescapable collectively to operate as if they were one server. The Oracle Clusterware requires two clusterware add-ons: a vote casting disk to checklist node membership assistance and the Oracle Cluster Registry (OCR) to listing cluster configuration counsel. The balloting disk and the OCR necessity to reside on shared storage. The Oracle Clusterware requires that every node breathe related to a personal community by the employ of a non-public interconnect.

The private interconnect that Oracle Clusterware requires is a sunder community that you simply configure between the cluster nodes. This interconnect, which is required by route of Oracle RAC, may also breathe the identical network that the clusterware uses, but the interconnect may noiseless now not breathe purchasable with the aid of nodes that don't appear to breathe a fraction of the cluster.

Oracle recommends that you configure a redundant interconnect to avoid the interconnect from being a separate point of failure. Oracle additionally recommends that you employ consumer Datagram Protocol (UDP) on a Gigabit Ethernet for your cluster interconnect. Crossover cables aren't supported for employ with Oracle Clusterware or Oracle RAC databases.

The Oracle Clusterware manages node membership and prevents split brain syndrome wherein two or greater cases try to manage the database. this may ensue in situations where there is a raze in verbal exchange between nodes through the interconnect.

The Oracle Clusterware architecture supports elevated availability with the aid of automatically restarting stopped add-ons. The Oracle Clusterware can automatically re-beginning a node to avoid problems with that node from affecting the provision of the leisure of the Oracle RAC ambiance. In an Oracle RAC ambiance, every Oracle strategies are under the ply of the Oracle clusterware. The Oracle Clusterware additionally gives an application programming interface (API) that enables you to control other Oracle techniques with Oracle Clusterware.

Oracle Clusterware application fraction Processing particulars

The Oracle Clusterware includes a number of background methods that facilitate cluster operations. The Cluster Synchronization provider (CSS), adventure administration (EVM), and Oracle Cluster add-ons discourse with other cluster constituent layers in the other situations inside the identical cluster database atmosphere. These accessories are additionally the leading conversation links between the Oracle Clusterware elevated availability accessories and the Oracle Database. additionally, these accessories video panoply and control database operations.

right here checklist describes the services of one of the most essential Oracle Clusterware add-ons. This record comprises these add-ons which are strategies on Unix and Linux operating programs or features on home windows.


On windows-primarily based operating techniques, many of the components are threads of the Oracle technique in its plot of sunder methods.
  • Cluster Synchronization features (CSS)—Manages the cluster configuration by route of controlling which nodes are members of the cluster and by using notifying individuals when a node joins or leaves the cluster. if you're using third-birthday party clusterware, then the css technique interfaces along with your clusterware to exploit node membership counsel.

  • Cluster capable features (CRS)—The simple software for managing extreme availability operations within a cluster. the leisure that the crs process manages is known as a cluster resource which can breathe a database, an instance, a service, a Listener, a digital IP (VIP) handle, an utility manner, etc. The crs technique manages cluster components in line with the aid's configuration counsel this is kept within the OCR. This comprises birth, stop, panoply screen and failover operations. The crs system generates routine when a aid fame adjustments. when you occupy do in Oracle RAC, crs screens the Oracle example, Listener, and so on, and instantly restarts these add-ons when a failure occurs. with the aid of default, the crs technique makes five makes an attempt to restart a resource after which does not merit additional restart attempts if the useful resource does not restart.

  • experience management (EVM)—A tradition system that publishes hobbies that crs creates.

  • Oracle Notification service (ONS)—A post and subscribe carrier for communicating quick utility Notification (FAN) activities.

  • RACG—Extends clusterware to usher Oracle-specific necessities and complicated components. Runs server callout scripts when FAN movements ensue.

  • method panoply screen Daemon (OPROCD)—This technique is locked in reminiscence to video panoply the cluster and provide I/O fencing. OPROCD performs its verify, stops working, and if the awaken is beyond the anticipated time, then OPROCD resets the processor and reboots the node. An OPROCD failure effects in Oracle Clusterware restarting the node. OPROCD uses the hangcheck timer on Linux systems.

  • In privilege here table, if a process has a (r) beside it, then the procedure runs as the root user. otherwise the manner runs because the oracle person.

    table 1-1 record of methods and windows services associated with Oracle Clusterware

    Oracle Clusterware component Linux/Unix method home windows servicesWindows procedures

    process computer screen Daemon

    oprocd (r)



    racgmain, racgimon

    racgmain.exe racgimon.exe

    Oracle Notification service (ONS)



    adventure supervisor

    evmd (r), evmd.bin, evmlogger


    evmlogger.exe, evmd.exe

    Cluster competent

    crsd.bin (r)



    Cluster Synchronization features

    init.cssd (r), ocssd (r), ocssd.bin



    The Oracle Clusterware utility add-ons

    When Oracle Clusterware operates, several platform-particular techniques or functions will even breathe working on each and every node within the cluster to assist Oracle Clusterware. The Oracle Clusterware platform-certain UNIX-primarily based tactics and home windows-based services are described under here headings:

    Oracle Clusterware techniques on UNIX-primarily based programs

    The Oracle Clusterware processes on UNIX-based mostly systems are:

  • crsd—Performs extreme availability restoration and management operations corresponding to keeping the OCR and managing utility elements. This technique runs because the root user, or via a consumer within the admin neighborhood on Mac OS X-based systems. This process restarts automatically upon failure.

  • evmd—event supervisor daemon. This process additionally starts the racgevt system to control FAN server callouts.

  • ocssd—Manages cluster node membership and runs as the oracle consumer; failure of this process effects in cluster restart.

  • oprocd—process monitor for the cluster. note that this process most effectual looks on structures that don't employ supplier clusterware with Oracle Clusterware.

  • observe:

    Oracle RAC on Linux structures can occupy varied threads that appear as sunder processes with sunder procedure identifiers. Oracle Clusterware functions on windows-based programs

    The Oracle Clusterware services on home windows-based mostly programs are:

  • OracleCRService—Performs extreme availability recovery and management operations such as maintaining the OCR and managing utility elements. This system runs because the root user, or with the aid of a person within the admin neighborhood on Mac OS X-primarily based systems. This technique restarts automatically upon failure.

  • OracleCSService—Manages cluster node membership and runs as oracle consumer; failure of this procedure outcomes in cluster restart.

  • OracleEVMService—experience manager daemon. This method also begins the racgevt system to control FAN server callouts.

  • OraFenceService—system panoply screen for the cluster. solemnize that this process best appears on structures that don't employ vendor clusterware with Oracle Clusterware.

  • The Oracle real software Clusters structure and Oracle real software Clusters Processing

    An Oracle RAC database is a logically or bodily shared every thing database. every datafiles, manage information, PFILEs, and redo log information in Oracle RAC environments must live on cluster-conscious shared disks so that every the cluster database circumstances can entry them. every of the cases must additionally share the equal interconnect. additionally, Oracle RAC databases can share the selfsame interconnect that Oracle Clusterware makes employ of.

    as a result of an Oracle RAC database uses a shared every thing architecture, Oracle RAC requires cluster-aware storage for every database files. it's your alternative as to the route to configure your disk, but you necessity to employ a supported cluster-conscious storage answer. Oracle Database 10g gives computerized Storage administration (ASM), which is the suggested solution to control your disk. besides the fact that children you may also also employ a cluster-mindful extent manager or a cluster file tackle (no longer required). In Oracle RAC, the Oracle Database software manages disk entry and the Oracle utility is certified to breathe used on a variety of storage architectures. An Oracle RAC database can occupy as much as a hundred instances. reckoning on your platform, you could employ here file storage options for Oracle RAC:

  • ASM, which Oracle recommends

  • Oracle Cluster File system (OCFS), which is obtainable for Linux and home windows platforms, or a third-birthday party cluster file tackle that's licensed for Oracle RAC

  • A community file device

  • raw gadgets

  • Oracle RAC databases orbit architecturally from Oracle RACsingle-example Oracle databases in that every Oracle RAC database instance additionally has:

    All nodes in an Oracle RAC environment must connect with a local belt network (LAN) to enable clients and purposes to entry the database. applications should noiseless employ the Oracle Database capabilities feature to hook up with an Oracle database. capabilities permit you to define guidelines and characteristics to ply how users and applications connect with database instances. These characteristics involve a special name, workload balancing and failover options, and extreme availability characteristics. Oracle internet capabilities allows for the tribulation balancing of software connections throughout the entire cases in an Oracle RAC database.

    users can access an Oracle RAC database the usage of a client-server configuration or through one or greater middle tiers, with or devoid of connection pooling. users can breathe DBAs, builders, application users, vigour clients, corresponding to statistics miners who create their personal searches, etc.

    Most public networks customarily employ TCP/IP, but which you could employ any supported hardware and software combination. Oracle RAC database cases will also breathe accessed via a database's defined, default IP tackle and through VIP addresses.


    do not to employ the interconnect or the private network for user conversation as a result of Cache Fusion uses the private interconnect for inter-illustration communications.

    besides the node's host title and IP address, you ought to additionally assign a virtual host title and an IP tackle to each and every node. The virtual host identify or VIP may noiseless breathe used to connect to the database example. as an instance, you could enter the virtual host title CRM within the address listing of the tnsnames.ora file.

    A virtual IP tackle is an alternate public ply that client connections employ in its plot of the tolerable public IP handle. To configure VIP addresses, you necessity to reserve a spare IP ply for each node that makes employ of the identical subnet as the public community.

    If a node fails, then the node's VIP fails over to yet another node on which the VIP can not accept connections. often, VIPs fail over when the node on which a VIP runs fails or if every interfaces for the VIP fail or are disconnected from the community. clients that attempt to connect with the VIP obtain a quick connection refused oversight instead of anticipating TCP join timeout messages. You configure VIP addresses in the address checklist in your database connection definition to allow connectivity. the following belt describes the Oracle RAC software add-ons in additional aspect.

    The Oracle real application Clusters application accessories

    Oracle RAC databases occupy two or extra database circumstances that each and every comprise reminiscence constructions and history methods. An Oracle RAC database has the identical techniques and reminiscence buildings as a single-illustration Oracle database in addition to further procedure and reminiscence buildings that are particular to Oracle RAC. any one instance's database view is just about similar to another instance's view within the selfsame Oracle RAC database; the view is a separate tackle photograph of the ambiance.

    every illustration has a buffer cache in its system world belt (SGA). using Cache Fusion, Oracle RAC environments logically mingle every instance's buffer cache to allow the circumstances to procedure records as if the statistics resided on a logically combined, separate cache.


    The SGA measurement necessities for Oracle RAC are more suitable than the SGA requirements for single-example Oracle databases as a result of Cache Fusion.

    To merit inescapable that every Oracle RAC database illustration obtains the obstruct that it must fulfill a question or transaction, Oracle RAC cases employ two processes, the world Cache carrier (GCS) and the global Enqueue service (GES). The GCS and GES retain information of the statuses of each records file and each cached obstruct using a worldwide useful resource listing (GRD). The GRD contents are allotted across every the lively circumstances, which comfortably raises the dimension of the tackle world belt for an Oracle RAC illustration.

    After one illustration caches data, another illustration within the identical cluster database can acquire a obstruct image from a different illustration in the selfsame database quicker than with the aid of reading the obstruct from disk. for this reason, Cache Fusion moves present blocks between instances in plot of re-analyzing the blocks from disk. When a constant obstruct is needed or a modified obstruct is required on an additional illustration, Cache Fusion transfers the obstruct picture without laggard between the affected instances. Oracle RAC makes employ of the private interconnect for inter-example verbal exchange and obstruct transfers. The world Enqueue provider video panoply and the illustration Enqueue system manages access to Cache Fusion resources as well as enqueue recuperation processing.

    These Oracle RAC approaches and the GRD collaborate to enable Cache Fusion. The Oracle RAC strategies and their identifiers are as follows:

  • LMS—international Cache service procedure

  • LMD—world Enqueue carrier Daemon

  • LMON—world Enqueue provider video display

  • LCK0—instance Enqueue process

  • in case you employ network connected Storage (NAS), you then are required to configure a 2d deepest community. entry to this network is usually managed by using the seller's application. The private network uses static IP addresses.


    many of the Oracle accessories that this fraction describes are moreover the add-ons which are described for single-example Oracle databases in Oracle Database ideas. Oracle Clusterware add-ons and extreme Availability

    when you combine Oracle Clusterware and Oracle RAC, which you could achieve excellent scalability and elevated availability. The Oracle Clusterware achieves this the usage of the accessories that this section describes below here themes:

    The Oracle Clusterware balloting Disk and Oracle Cluster Registry

    The Oracle Clusterware requires the following two vital information:

  • balloting Disk—Manages cluster membership by the employ of a health check and arbitrates cluster ownership among the many situations in case of community screw ups. Oracle RAC uses the balloting disk to investigate which instances are contributors of a cluster. The vote casting disk ought to reside on shared disk. for top availability, Oracle recommends that you've dissimilar balloting disks. The Oracle Clusterware allows assorted balloting disks but you occupy to occupy an peculiar number of balloting disks, such as three, five, and the like. in case you silhouette a separate vote casting disk, then breathe certain to employ external mirroring to deliver redundancy.

  • Oracle Cluster Registry (OCR)—maintains cluster configuration suggestions as well as configuration guidance about any cluster database within the cluster. The OCR also manages suggestions about procedures that Oracle Clusterware controls. The OCR outlets configuration counsel in a sequence of key-price pairs within a listing tree structure. The OCR occupy to tarry on shared disk it truly is purchasable with the aid of the entire nodes to your cluster. The Oracle Clusterware can multiplex the OCR and Oracle recommends that you employ this role to breathe inescapable cluster elevated availability. you can change a failed OCR on-line, and you can update the OCR through supported APIs such as traffic supervisor, the Server manage Utility (SRVCTL), or the Database Configuration helper (DBCA).

  • note:

    each the voting disks and the OCRs occupy to tarry on either cluster file device info or on shared raw devices that you configure before you install Oracle Clusterware and Oracle RAC. Oracle Clusterware elevated Availability and the software Programming Interface

    Oracle Clusterware offers a extreme availability utility programming interface (API) so you might employ to allow Oracle Clusterware to manage purposes or tactics that elope a cluster. This allows for you to deliver extreme availability for every of your purposes. The Oracle Clusterware with ASM allows you to create a consolidated pool of storage to hearten each the only-illustration Oracle databases and the Oracle RAC databases which are running for your cluster.

    To maintain extreme availability, Oracle Clusterware components can reply to reputation alterations to restart purposes and strategies in accordance with described extreme availability rules. furthermore, you can employ the Oracle Clusterware extreme availability framework by registering your applications with Oracle Clusterware and configuring the clusterware to birth, stop, or relocate your application methods. that is, you can merit custom functions particularly attainable by using Oracle Clusterware to create profiles that monitor, relocate, and restart your applications. The Oracle Clusterware responds to FAN hobbies that are created by means of an Oracle RAC database. Oracle publicizes FAN hobbies when cluster servers may additionally become unreachable and community interfaces are gradual or non-practical.

    Workload administration with Oracle real application Clusters

    Workload management permits you to manage the distribution of workloads to supply most usurp performance for users and functions. This comprises featuring the optimum availability for database connections, swift failure recuperation, and balancing workloads optimally throughout the dynamic configuration. Oracle Database 10g with Oracle RAC contains many points that may enlarge workload administration equivalent to connection load balancing, snappily connection failover (FCF), the load balancing advisory, and Runtime Connection Load Balancing. Workload management gives the foremost merits to Oracle RAC environments. that you may, although, win skills of workload administration by using Oracle services in single-instance Oracle Databases, exceptionally people that employ records protect or Streams. Workload management comprises here components:

  • excessive Availability Framework—The Oracle RAC extreme availability framework makes it possible for the Oracle Database to retain add-ons in a working situation continuously. Oracle extreme availability implies that Oracle Clusterware displays and restarts critical components if they stop, until you override the restart processing. The Oracle Clusterware and Oracle RAC also deliver signals to clients when configurations alternate. This permits valued clientele to instantly react to the changes, enabling software builders to conceal outages and reconfigurations from terminate clients. The scope of Oracle extreme availability spans from the restarting of stopped Oracle processes in an Oracle database instance to failing over the processing of an entire illustration to other obtainable circumstances.

  • Load Balancing Advisory—here's the capability of the database to deliver advice to purposes concerning the existing provider degrees being supplied via the database and its circumstances. purposes can win potential of this advice to direct connection requests to the instance so one can provide the utility request with the most beneficial provider best to finished the utility's processing. Oracle has integrated its Java Database Connectivity (JDBC) and Oracle records company for .internet (ODP.internet) connection swimming pools to travail with the load balancing counsel. applications can employ the integrated connection swimming pools without programmatic adjustments.

  • functions—Oracle Database 10g introduces an impressive automatic workload management facility, called functions, to allow the traffic grid vision. services are entities so that you can silhouette in Oracle RAC databases. capabilities permit you to neighborhood database workloads and route the travail to the greatest situations that are assigned to method the service. in addition, which you can employ services to define the resources that Oracle assigns to method workloads and to panoply screen workload materials. purposes that you simply assign to features transparently acquire the described workload administration traits, including extreme availability and load balancing guidelines. Many Oracle database features are built-in with capabilities, such as resource supervisor, which permits you to preclude the materials that a carrier can employ within an illustration. Some database facets are additionally built-in with Oracle Streams, advanced Queuing, to obtain queue plot transparency, and the Oracle Scheduler, to map services to specific job classes.

    In Oracle RAC databases, the provider efficiency guidelines that you just configure control the quantity of travail that Oracle allocates to every available illustration for that provider. As you extend your database by adding nodes, purposes, accessories of applications, and so on, which you can add more features.

  • Connection Load Balancing— Oracle internet features gives connection load balancing for database connections. Connection load balancing occurs when the connection is created. Connections for a given carrier are balanced throughout the entire operating cases that present the provider. you'll want to define the route you necessity connections to breathe balanced in the provider definition. despite the fact, you should nonetheless configure Oracle web capabilities. if you chance to allow the load balancing advisory, the Listener makes employ of the weight balancing advisory for connection load balancing.

  • Introduction to installing Oracle Clusterware and Oracle precise software Clusters

    This section introduces the storage alternatives for Oracle RAC and the setting up techniques for each Oracle Clusterware and Oracle RAC under the following matter matters:

    Oracle Clusterware installation technique Description

    The Oracle Clusterware is dispensed on the Oracle Database 10g setting up media. The Oracle generic Installer (OUI) installs Oracle Clusterware into a directory structure, which will also breathe called CRS_home, it really is become independent from other Oracle application running on the desktop. as a result of Oracle Clusterware works intently with the working system, gadget administrator access is required for one of the vital setting up tasks. additionally, some of the Oracle Clusterware strategies ought to elope because the tackle administrator, which is often the root consumer on Unix and Linux methods and the gadget Administrator consumer on windows methods.

    before you install Oracle Clusterware, Oracle recommends that you simply elope the Cluster Verification Utility (CVU) to merit certain that your ambiance meets the Oracle Clusterware installation requirements. The OUI additionally immediately runs CVU at the terminate of the clusterware setting up to examine a considerable number of clusterware add-ons. The CVU simplifies the installation, configuration, and routine administration of the Oracle Clusterware setting up system through making a preference on issues in cluster environments.

    all over the Oracle Clusterware installing, you ought to identify three IP addresses for each and every node that goes to breathe a fraction of your setting up. One IP tackle is for the inner most interconnect and the other is for the generic public interconnect. The third IP address is the digital IP ply that valued clientele will employ to connect to each illustration.

    The Oracle Clusterware installing procedure creates the voting disk and OCR on cluster-mindful storage. in case you pick the preference for typical redundant copies privilege through the installing system, then Oracle Clusterware instantly keeps redundant copies of these information to steer pellucid of the info from fitting separate features of failure. The generic redundancy feature also eliminates the want for third celebration storage redundancy options. for those who employ yardstick redundancy, Oracle Clusterware immediately continues two copies of the Oracle Cluster Registry (OCR) file and three copies of the voting Disk file.


    in case you pick exterior redundancy for the OCR and voting disk, then to permit redundancy, your disk subsystem should breathe configurable for RAID mirroring. in any other case, your device could breathe susceptible since the OCR and voting disk are separate aspects of failure. Oracle real utility Clusters installation and Database creation procedure Description

    The Oracle RAC application is disbursed as fraction of the Oracle Database 10g setting up media. through default, the commonplace Oracle Database 10g software setting up system installs the Oracle RAC option when it acknowledges that you're performing the installing on a cluster. The OUI installs Oracle RAC into a directory constitution, which will also breathe called Oracle_home, it is crash away other Oracle application working on the laptop. as a result of OUI is cluster-conscious, it installs the Oracle RAC software on every the nodes that you defined to breathe a fraction of the cluster. if you're the employ of a certified cluster file gadget for the Oracle home, then simplest select the node that you're related to for the installing.

    You necessity to first set up Oracle Clusterware earlier than installation Oracle RAC. After Oracle Clusterware is operational, that you can employ OUI to set up the Oracle database utility with the Oracle RAC components. privilege through the installation, OUI runs DBCA to create your Oracle RAC database in line with the alternate options that you select. The DBCA also runs the internet Configuration helper (NETCA) to configure the community for your Oracle RAC ambiance.

    Oracle recommends that you simply opt for ASM every through the installing to simplify storage management; ASM instantly manages the storage of every database info within disk companies. which you could additionally configure capabilities every over setting up, counting on your processing necessities. when you are the usage of the Oracle Database 10g generic version, then you definitely ought to employ ASM for storing the entire database data.

    via default, DBCA creates one service on your ambiance and this carrier is for the database. The default service is attainable on every instances in an Oracle RAC atmosphere, until the database is in constrained mode.

    Cloning Oracle Clusterware and Oracle RAC software in Grid Environments

    This section briefly summarizes the procedures for deploying Oracle RAC in grid environments which occupy vast numbers of nodes the employ of cloned photos for Oracle Clusterware and Oracle RAC. Oracle cloning is the favourite formulation of extending your Oracle RAC ambiance by using including nodes and circumstances. To achieve the cloning approaches that are summarized during this section, refer to the Oracle ordinary Installer and OPatch consumer's guide.that you may additionally employ traffic supervisor Grid control to achieve cloning.

    The cloning manner assumes that you correctly do in an Oracle Clusterware domestic and an Oracle domestic with Oracle RAC on at least one node. in addition, every root scripts ought to occupy elope successfully on the node from which you're extending your cluster database. to merit employ of Oracle cloning, first clone the Oracle Clusterware home after which clone the Oracle domestic with the Oracle RAC application.

    To clone the Oracle Clusterware domestic, on UNIX-based methods create a tar file of the Oracle Clusterware domestic and duplicate the file to the brand unusual node's Oracle Clusterware domestic. On windows-based techniques you should create zip information. Then on UNIX-based programs create the required users and companies on the brand unusual nodes. On windows-primarily based methods, you don't should create clients and agencies, however the user that performs the cloning should noiseless breathe the equal consumer that carried out the setting up.

    Extract the tar file, or unzip the zip file, and elope the Oracle regular Installer (OUI) in clone mode as described in the Oracle usual Installer and OPatch user's e-book. Then elope the installing scripts and restate these steps on every node that you're adding. The procedure for cloning the Oracle home onto unusual nodes is similar to the method for cloning the Oracle Clusterware home. in addition, you must elope the Oracle net Configuration helper (NETCA) on each unusual node to create a Listener.

    in case you occupy not already created a database, then that you could elope the Database Configuration helper (DBCA) to create one. ultimately, solemnize the post-cloning procedures to finished the extension of your Oracle RAC atmosphere onto the brand unusual nodes.

    extra concerns and lines for Oracle real application Clusters

    moreover configuring features to exploit your workloads, also agree with using privilege here aspects when you install Oracle RAC:

  • Scaling Your Oracle RAC Database—As mentioned, you could add nodes and instances to your Oracle RAC environment the employ of Oracle cloning. in case you settle to not employ cloning, then you could prolong your database through the employ of the usher approaches which are described in Chapter 10, "adding and Deleting Nodes and circumstances on UNIX-based mostly methods" or Chapter eleven, " adding and Deleting Nodes and situations on home windows-based techniques".

  • enterprise supervisor—Use commercial enterprise supervisor to administer your entire Oracle RAC ambiance, not simply the Oracle RAC database. employ traffic supervisor to create and adjust capabilities, and to beginning and forestall the cluster database cases and the cluster database. traffic manager has further elements as specific in the belt "Overview of using enterprise manager with Oracle precise utility Clusters".

  • recovery supervisor (RMAN)—RMAN backs up, restores, and recovers datafiles, ply information, server parameter data (SPFILEs) and archived redo logs. which you could employ RMAN with a media supervisor to again up files to exterior storage. you can additionally configure parallelism when backing up or improving Oracle RAC databases. In Oracle RAC, RMAN channels may also breathe dynamically allocated throughout every the Oracle RAC situations. Channel failover permits failed operations on one node to proceed on one other node. which you can employ RMAN in Oracle RAC from the Oracle enterprise manager Backup manager or from a command line.

  • automated undo management—instantly manages undo processing.

  • computerized section house administration (ASSM)—immediately manages section freelists and freelist companies.

  • in the neighborhood managed tablespaces—Enhances belt management efficiency.

  • Cluster Verification Utility (CVU)—Use CVU to determine the status of your clusterware in case you event complications or employ it on every occasion you reconfigure your cluster.

  • Sequences—if you employ sequence numbers, then always employ CACHE with the NOORDER option for greatest sequence quantity technology efficiency. With the CACHE choice, besides the fact that children, you may additionally occupy gaps within the sequence numbers. in case your environment can not tolerate sequence number gaps, then employ the NOCACHE preference or believe pre-generating the sequence numbers. if your software requires sequence quantity ordering but can tolerate gaps, then employ CACHE and ORDER to cache and order sequence numbers in Oracle RAC. in case your application requires ordered sequence numbers devoid of gaps, then employ NOCACHE and ORDER. This aggregate has the most penniless effect on efficiency in comparison to other caching and ordering mixtures.

  • Indexes—in case you employ indexes, believe options, reminiscent of transpose key indexes, to optimize index efficiency. transpose key indexes are exceptionally effectual if in case you occupy universal inserts to 1 side of an index, corresponding to indexes which are according to insert date.

  • Managing Oracle actual application Clusters Environments

    This fraction describes the following Oracle RAC environment administration topics:

    Designing Oracle precise application Clusters Environments

    accept as legal with performing the following steps every the route through the design and construction of functions that you're deploying on an Oracle RAC database. account tuning:

  • The design and the utility

  • The reminiscence and that i/O

  • competition

  • The working device

  • observe:

    If an software does not scale on an SMP computer, then stirring the application to an Oracle RAC database cannot enrich performance.

    trust using hash partitioning for insert-intensive online transaction processing (OLTP) applications. Hash partitioning:

  • Reduces rivalry on concurrent inserts privilege into a separate database structure

  • impacts sequence-based mostly indexes when indexes are locally partitioned with a table and tables are partitioned on sequence-based mostly keys

  • Is transparent to the software

  • in case you hash partitioned tables and indexes for OLTP environments, then which you could drastically better efficiency to your Oracle RAC database. notice that you just can't employ index latitude scans on an index with hash partitioning.

    if you're using sequence numbers, then always employ the CACHE alternative. if you employ sequence numbers with the CACHE option, then:

    Administrative tackle for Oracle actual utility Clusters Environments

    Oracle makes it possible for you to administer a cluster database as a separate gadget image via enterprise manager, SQL*Plus, or via Oracle RAC command-line interfaces equivalent to Server control (SRVCTL). which you could also employ several tools and utilities to control your Oracle RAC atmosphere and its components as follows:

  • business manager—commercial enterprise manager has each the Database manage and Grid control GUI interfaces for managing each separate illustration and Oracle RAC environments.

  • Cluster Verification Utility (CVU)—CVU is a command-line device that you can employ to verify a number cluster and Oracle RAC-specific accessories reminiscent of shared storage contraptions, networking configurations, gadget requirements, and Oracle Clusterware, in addition to operating gadget groups and users. that you could employ CVU for pre-installing exams in addition to for post-installing tests of your cluster ambiance. CVU is above every advantageous every over pre-installation and privilege through setting up of Oracle Clusterware and Oracle RAC accessories. The OUI runs CVU after Oracle Clusterware and the Oracle installing to determine your ambiance.

  • Server manage (SRVCTL)—SRVCTL is a command-line interface so you might employ to manage an Oracle RAC database from a separate element. which you could employ SRVCTL to delivery and quit the database and situations and to delete or circulation situations and features. which you could additionally employ SRVCTL to manage configuration guidance.

    See additionally:

    Appendix E for more counsel about SRVCTL
  • Cluster in a position capabilities control (CRSCTL)—CRSCTL is a command-line utensil that you can employ to control Oracle Clusterware. which you can employ CRSCTL to birth and forestall Oracle Clusterware. CRSCTL has many alternatives equivalent to enabling on-line debugging,

  • Oracle Interface Configuration device (OIFCFG)—OIFCFG is a command-line utensil for both single-example Oracle databases and Oracle RAC environments so you might employ to earmark and de-allocate network interfaces to components. which you can additionally employ OIFCFG to direct add-ons to employ specific network interfaces and to retrieve constituent configuration counsel.

  • OCR Configuration device (OCRCONFIG)—OCRCONFIG is a command-line device for OCR administration. you can additionally employ the OCRCHECK and OCRDUMP utilities to troubleshoot configuration problems that occupy an effect on the OCR.

  • Monitoring Oracle precise utility Clusters Environments

    web-based commercial enterprise supervisor Database manage and Grid ply enable you to panoply screen an Oracle RAC database. The traffic supervisor Console is a valuable point of control for the Oracle ambiance that you just access by the employ of a graphical consumer interface (GUI). employ the enterprise manager Console to initiate cluster database management tasks. employ traffic manager Grid control to administer multiple Oracle RAC databases. also solemnize here points about monitoring Oracle RAC environments:

  • The international views, or GV$ views, are based on V$ views. The catclustdb.sql script creates the GV$ views. elope this script if you don't create your database with DBCA. in any other case, DBCA runs this script for you.

  • Statspack is Oracle RAC-mindful.


    as a substitute of the employ of Statspak, Oracle recommends that you just employ the extra sophisticated administration and monitoring aspects of the Oracle Database 10g Diagnostic and Tuning packs which involve the automated Database Diagnostic video panoply (ADDM).
  • Evaluating efficiency in Oracle actual utility Clusters Environments

    You don't should operate particular tuning for Oracle RAC; Oracle RAC scales with out particular configuration alterations. if your software performed neatly on a single-example Oracle database, then it'll operate neatly in an Oracle RAC atmosphere. most of the tuning tasks that you'd role on a single-instance Oracle database can additionally enlarge Oracle RAC database efficiency. here is especially legal in case your environment required scalability across a improved number of CPUs.

    probably the most Oracle RAC efficiency aspects are:

  • Dynamic resource Allocation

  • Cache Fusion allows for A Simplified Tuning Methodology

  • You enact not necessity to tune any parameters for Cache Fusion

  • No application-level tuning is crucial

  • that you may employ a backside-up tuning strategy with well-nigh no impact to your latest functions

  • greater particular performance records

  • New Oracle VM Templates for Oracle real utility Clusters Now purchasable | real Questions and Pass4sure dumps

    New Oracle VM Templates for Oracle legal software Clusters Now accessible

    source: Oracle organization

    Oracle Corporation

    November 15, 2010 08:00 ET

    Simplifies Deployment of a incredibly available, Virtualized Database

    REDWOOD SHORES, CA--(Marketwire - November 15, 2010) - Oracle (NASDAQ: ORCL)

    information statistics

  • Enabling valued clientele to swiftly installation a particularly obtainable, virtualized database, Oracle nowadays introduced the availability of recent Oracle VM Templates for Oracle Database 11g unencumber 2 and Oracle actual software Clusters.
  • with the aid of providing pre-put in and pre-configured application photographs, Oracle VM Templates deliver an ingenious strategy to deploying a fully configured utility stack and permit digital and cloud environments to breathe provisioned rapidly, comfortably, perpetually, and with simplified administration.
  • the unusual Oracle VM Templates for Oracle precise application Clusters deliver a snappily and straightforward strategy to installation a database cluster on Oracle VM for building, test and production environments. Clusters of any variety of nodes may also breathe constructed, and the complete installation is automated, inquiring for minimal assistance from the consumer when guests are booted.
  • Combining the advantages of Oracle VM for x86 and Oracle true utility Clusters presents a highly attainable database cloud solution with the entire benefits of a fully virtualized atmosphere.
  • the brand unusual Oracle VM Templates are available in 32-bit or 64-bit system codecs.
  • enjoyable compund of Virtualization and Clustering Speeds Time to Market and permits higher Availability

  • Use of Oracle VM Templates tremendously simplifies installation and configuration, assisting reduce initial and ongoing protection fees and permitting organizations to achieve faster time to market and lower cost of operations.
  • by using deploying Oracle real software Clusters in Oracle VM environments with the brand unusual templates, purchasers can benefit from enhanced database availability. 
  • The compund of Oracle VM and Oracle precise application Clusters enables perennial availability in the countenance of hardware and application failures, a trustworthy deal greater availability than would historically be bought through hypervisor-most effectual solutions from companies dote VMware, that could handiest circulate and restart failed digital machines. 
  • Oracle VM Templates are additionally purchasable for Oracle functions, Oracle Fusion Middleware, Oracle Database, Oracle Linux, Oracle Solaris and other Oracle items.
  • supporting Quote

  • "handiest Oracle offers the wonderful aggregate of clustering and virtualization," stated Wim Coekaerts, senior vice chairman, Linux and Virtualization Engineering, Oracle. "the employ of an Oracle VM infrastructure combined with the efficiency, scalability and resiliency of Oracle precise application Clusters and Oracle VM Templates, they assist shoppers significantly reduce back deployment and operational expenses whereas enabling a highly attainable infrastructure."
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    If you employ Oracle technologies, you may breathe relying on Oracle Enterprise Manager (OEM) to manage your clouds, applications and databases. But if you’re answerable for multiple environments with hundreds of databases as well as Oracle real Application Clusters (RACs) and Oracle Exadata, then OEM alone will not enable you to enact your job effectively.

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    Oracle 12c Database now available | real questions and Pass4sure dumps

    The Oracle 12c Database is now generally available, with its most touted aspect being a database virtualization feature called Pluggable Databases.

    The Redwood Shores, Calif.-based IT company announced Oracle 12c Database at its OpenWorld panoply terminal year, but at the time the product had been in beta mode for months. Now it is available for download on Linux and Solaris, with an official version number of Oracle Database Mike Dietrich, a senior principal technologist who announced the generic availability in a blog post, wrote in comments below the post that Oracle 12c Database will breathe supported on Microsoft Windows Server and IBM AIX operating systems, but he wouldn't roar when.

    "I'm looking forward to downloading 12c and trying it out," said Bobby Durrett, lead Oracle DBA at US Foods. "Unfortunately, they don't occupy 32-bit Windows or Linux versions out -- just 64-bit Linux and a yoke Solaris 64-bit versions."

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    The most-talked about feature of Oracle 12c Database has been Pluggable Databases, and database administrators (DBAs) said this week they were interested in exploring the cost benefits around it. The feature, now called Oracle Multitenant, essentially allows a database administrator to set up a container database with multiple pluggable databases inside. During patches and upgrades, only the container database needs changing. Also, a pluggable database can breathe moved to another container database, either on the selfsame server or somewhere else in the network.

    But it will reach at a cost. On the Oracle expense list, updated this week, the feature is called "multitenant." It will cost about $21,000 per processor or $430 per user in a named user plus licensing scenario.

    "With Pluggable Databases there are things you can consolidate, and possibly you can redeem on the other side, with database management and maintenance," said Michelle Malcher, a DBA, Oracle ACE Director and president of the Independent Oracle Users Group. "I mediate it's a mighty option to start to play with; to remark what employ cases there are."

    Amit Das, database engineering architect at PayPal, said Pluggable Databases was one of the top features he was looking at with Oracle 12c Database. Another feature that interests Das is Flex Automatic Storage Management (ASM), which requires fewer ASM instances when running Oracle real Application Clusters (RAC).

    "We occupy some plans to employ this soon," he said.

    Malcher added that unusual security features in Oracle 12c Database are smooth to implement and "closer to the core of the database." One of them is called Oracle Advanced Security Data Redaction, which can cloak data from SQL query results prior to panoply based on factors such as a user's IP address.

    Oracle Database 12c Release 2 real Application Clusters Handbook: Concepts, Administration, Tuning & Troubleshooting | real questions and Pass4sure dumps

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    Healthcare [3 Certification Exam(s) ]
    HIPAA [2 Certification Exam(s) ]
    Hitachi [30 Certification Exam(s) ]
    Hortonworks [4 Certification Exam(s) ]
    Hospitality [2 Certification Exam(s) ]
    HP [750 Certification Exam(s) ]
    HR [4 Certification Exam(s) ]
    HRCI [1 Certification Exam(s) ]
    Huawei [21 Certification Exam(s) ]
    Hyperion [10 Certification Exam(s) ]
    IAAP [1 Certification Exam(s) ]
    IAHCSMM [1 Certification Exam(s) ]
    IBM [1532 Certification Exam(s) ]
    IBQH [1 Certification Exam(s) ]
    ICAI [1 Certification Exam(s) ]
    ICDL [6 Certification Exam(s) ]
    IEEE [1 Certification Exam(s) ]
    IELTS [1 Certification Exam(s) ]
    IFPUG [1 Certification Exam(s) ]
    IIA [3 Certification Exam(s) ]
    IIBA [2 Certification Exam(s) ]
    IISFA [1 Certification Exam(s) ]
    Intel [2 Certification Exam(s) ]
    IQN [1 Certification Exam(s) ]
    IRS [1 Certification Exam(s) ]
    ISA [1 Certification Exam(s) ]
    ISACA [4 Certification Exam(s) ]
    ISC2 [6 Certification Exam(s) ]
    ISEB [24 Certification Exam(s) ]
    Isilon [4 Certification Exam(s) ]
    ISM [6 Certification Exam(s) ]
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    ITEC [1 Certification Exam(s) ]
    Juniper [64 Certification Exam(s) ]
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    Lotus [66 Certification Exam(s) ]
    LPI [24 Certification Exam(s) ]
    LSI [3 Certification Exam(s) ]
    Magento [3 Certification Exam(s) ]
    Maintenance [2 Certification Exam(s) ]
    McAfee [8 Certification Exam(s) ]
    McData [3 Certification Exam(s) ]
    Medical [69 Certification Exam(s) ]
    Microsoft [374 Certification Exam(s) ]
    Mile2 [3 Certification Exam(s) ]
    Military [1 Certification Exam(s) ]
    Misc [1 Certification Exam(s) ]
    Motorola [7 Certification Exam(s) ]
    mySQL [4 Certification Exam(s) ]
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    Network-General [12 Certification Exam(s) ]
    NetworkAppliance [39 Certification Exam(s) ]
    NI [1 Certification Exam(s) ]
    NIELIT [1 Certification Exam(s) ]
    Nokia [6 Certification Exam(s) ]
    Nortel [130 Certification Exam(s) ]
    Novell [37 Certification Exam(s) ]
    OMG [10 Certification Exam(s) ]
    Oracle [279 Certification Exam(s) ]
    P&C [2 Certification Exam(s) ]
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    PayPal [1 Certification Exam(s) ]
    Pegasystems [12 Certification Exam(s) ]
    PEOPLECERT [4 Certification Exam(s) ]
    PMI [15 Certification Exam(s) ]
    Polycom [2 Certification Exam(s) ]
    PostgreSQL-CE [1 Certification Exam(s) ]
    Prince2 [6 Certification Exam(s) ]
    PRMIA [1 Certification Exam(s) ]
    PsychCorp [1 Certification Exam(s) ]
    PTCB [2 Certification Exam(s) ]
    QAI [1 Certification Exam(s) ]
    QlikView [1 Certification Exam(s) ]
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    RACC [1 Certification Exam(s) ]
    Real-Estate [1 Certification Exam(s) ]
    RedHat [8 Certification Exam(s) ]
    RES [5 Certification Exam(s) ]
    Riverbed [8 Certification Exam(s) ]
    RSA [15 Certification Exam(s) ]
    Sair [8 Certification Exam(s) ]
    Salesforce [5 Certification Exam(s) ]
    SANS [1 Certification Exam(s) ]
    SAP [98 Certification Exam(s) ]
    SASInstitute [15 Certification Exam(s) ]
    SAT [1 Certification Exam(s) ]
    SCO [10 Certification Exam(s) ]
    SCP [6 Certification Exam(s) ]
    SDI [3 Certification Exam(s) ]
    See-Beyond [1 Certification Exam(s) ]
    Siemens [1 Certification Exam(s) ]
    Snia [7 Certification Exam(s) ]
    SOA [15 Certification Exam(s) ]
    Social-Work-Board [4 Certification Exam(s) ]
    SpringSource [1 Certification Exam(s) ]
    SUN [63 Certification Exam(s) ]
    SUSE [1 Certification Exam(s) ]
    Sybase [17 Certification Exam(s) ]
    Symantec [134 Certification Exam(s) ]
    Teacher-Certification [4 Certification Exam(s) ]
    The-Open-Group [8 Certification Exam(s) ]
    TIA [3 Certification Exam(s) ]
    Tibco [18 Certification Exam(s) ]
    Trainers [3 Certification Exam(s) ]
    Trend [1 Certification Exam(s) ]
    TruSecure [1 Certification Exam(s) ]
    USMLE [1 Certification Exam(s) ]
    VCE [6 Certification Exam(s) ]
    Veeam [2 Certification Exam(s) ]
    Veritas [33 Certification Exam(s) ]
    Vmware [58 Certification Exam(s) ]
    Wonderlic [2 Certification Exam(s) ]
    Worldatwork [2 Certification Exam(s) ]
    XML-Master [3 Certification Exam(s) ]
    Zend [6 Certification Exam(s) ]

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