1Z0-432 exam Dumps Source : Oracle existent Application Clusters 12c Essentials
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Test name : Oracle existent Application Clusters 12c Essentials
Vendor name : Oracle
: 85 existent Questions
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This chapter introduces Oracle Clusterware and Oracle actual software Clusters (Oracle RAC) by describing these products as well as a way 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 issue relish they are one server to conclusion users and purposes. Oracle Database 10g loyal 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 lone device.
Oracle Clusterware is a conveyable cluster administration solution that's built-in with the Oracle database. The Oracle Clusterware is additionally a required section for the usage of Oracle RAC. in addition, Oracle Clusterware permits each single-illustration Oracle databases and Oracle RAC databases to obtain employ of the Oracle unreasonable availability infrastructure. The Oracle Clusterware allows for you to create a clustered pool of storage to breathe used by way of any blend 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 suffer a one-to-one relationship between the Oracle database and the illustration. Oracle RAC environments, however, suffer a one-to-many relationship between the database and instances. In Oracle RAC environments, the cluster database circumstances access one database. The combined processing vigor of the distinct servers can deliver improved throughput and scalability than is obtainable from a lone server. Oracle RAC is the Oracle Database alternative that gives a lone paraphernalia image for varied servers to access one Oracle database. In Oracle RAC, each Oracle illustration always runs on a separate server.
Oracle RAC is a unique technology that provides elevated availability and scalability for every lone utility kinds. The Oracle RAC infrastructure is additionally a key ingredient for enforcing the Oracle industry grid computing architecture. Having distinctive circumstances entry a lone database prevents the server from being a lone point of failure. Oracle RAC enables you to mingle smaller commodity servers perquisite into a cluster to create scalable environments that serve mission faultfinding 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 confident 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 separate community that you simply configure between the cluster nodes. This interconnect, which is required by way of Oracle RAC, may besides 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 seem to breathe a section of the cluster.
Oracle recommends that you configure a redundant interconnect to avoid the interconnect from being a lone 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 demolish 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 lone Oracle strategies are under the exploit 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 section 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 converse with other cluster ingredient 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.
notice:On windows-primarily based operating techniques, many of the components are threads of the Oracle technique in its Place of separate methods.
Cluster Synchronization features (CSS)—Manages the cluster configuration by way 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 unreasonable availability operations within a cluster. the repose 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 suffer 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 obtain additional restart attempts if the useful resource does not restart.
experience management (EVM)—A heritage 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 lead Oracle-specific necessities and complicated components. Runs server callout scripts when FAN movements ensue.
method panoply screen Daemon (OPROCD)—This technique is locked in memory 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 perquisite 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 ClusterwareOracle Clusterware component Linux/Unix method home windows servicesWindows procedures
process computer screen Daemon
Oracle Notification service (ONS)
evmd (r), evmd.bin, evmlogger
Cluster Synchronization features
init.cssd (r), ocssd (r), ocssd.bin
ocssd.exeThe 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 unreasonable 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 suffer varied threads that seem as separate processes with separate procedure identifiers. Oracle Clusterware functions on windows-based programs
The Oracle Clusterware services on home windows-based mostly programs are:
OracleCRService—Performs unreasonable 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 manner besides begins the racgevt system to control FAN server callouts.
OraFenceService—system panoply screen for the cluster. keep that this process best appears on structures that don't employ vendor clusterware with Oracle Clusterware.
An Oracle RAC database is a logically or bodily shared every thing database. every lone datafiles, manage information, PFILEs, and redo log information in Oracle RAC environments must live on cluster-conscious shared disks so that every lone the cluster database circumstances can entry them. every lone of the cases must additionally partake the equal interconnect. additionally, Oracle RAC databases can partake 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 lone database files. it's your alternative as to the way 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 besides also employ a cluster-mindful extent manager or a cluster file paraphernalia (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 suffer 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 paraphernalia that's licensed for Oracle RAC
A community file device
Oracle RAC databases sweep 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 region 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 exploit how users and applications connect with database instances. These characteristics comprise a special name, workload balancing and failover options, and unreasonable availability characteristics. Oracle internet capabilities allows for the cross 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 besides breathe accessed via a database's defined, default IP tackle and through VIP addresses.
observe: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 name and IP address, you ought to additionally allot a virtual host name 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 name CRM within the address listing of the tnsnames.ora file.
A virtual IP tackle is an alternate public exploit that client connections employ in its Place of the middling public IP handle. To configure VIP addresses, you necessity to reserve a spare IP exploit 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 lone 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 associate timeout messages. You configure VIP addresses in the address checklist in your database connection definition to allow connectivity. the following region describes the Oracle RAC software add-ons in additional aspect.The Oracle existent application Clusters application accessories
Oracle RAC databases suffer two or extra database circumstances that each and every comprise memory 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 lone paraphernalia photograph of the ambiance.
every case has a buffer cache in its system world region (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, lone cache.
note: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 obtain confident that every Oracle RAC database case obtains the obscure 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 obscure using a worldwide useful resource listing (GRD). The GRD contents are allotted across every lone the lively circumstances, which comfortably raises the dimension of the paraphernalia world region for an Oracle RAC illustration.
After one case caches data, another case within the identical cluster database can acquire a obscure image from a different case in the selfsame database quicker than with the aid of reading the obscure from disk. for this reason, Cache Fusion moves present blocks between instances in Place of re-analyzing the blocks from disk. When a constant obscure is needed or a modified obscure is required on an additional illustration, Cache Fusion transfers the obscure picture without slow between the affected instances. Oracle RAC makes employ of the private interconnect for inter-example verbal exchange and obscure 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.
observe:many of the Oracle accessories that this section describes are moreover the add-ons which are described for single-example Oracle databases in Oracle Database ideas. Oracle Clusterware add-ons and unreasonable 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 suffer to suffer an peculiar number of balloting disks, such as three, five, and the like. in case you outline a lone vote casting disk, then breathe confident 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 besides 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 suffer to linger 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 confident cluster elevated availability. you can change a failed OCR on-line, and you can update the OCR through supported APIs such as industry supervisor, the Server manage Utility (SRVCTL), or the Database Configuration lieutenant (DBCA).
note:each the voting disks and the OCRs suffer to linger 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 unreasonable availability utility programming interface (API) so you might employ to allow Oracle Clusterware to manage purposes or tactics that rush a cluster. This allows for you to deliver unreasonable availability for every lone of your purposes. The Oracle Clusterware with ASM allows you to create a consolidated pool of storage to serve each the only-illustration Oracle databases and the Oracle RAC databases which are running for your cluster.
To maintain unreasonable availability, Oracle Clusterware components can reply to reputation alterations to restart purposes and strategies in accordance with described unreasonable availability rules. furthermore, you can employ the Oracle Clusterware unreasonable 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 obtain 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 existent application Clusters
Workload management permits you to manage the distribution of workloads to supply most confiscate performance for users and functions. This comprises featuring the optimum availability for database connections, swift failure recuperation, and balancing workloads optimally throughout the vigorous configuration. Oracle Database 10g with Oracle RAC contains many points that may expand workload administration equivalent to connection load balancing, quick 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 unreasonable availability framework makes it feasible for the Oracle Database to retain add-ons in a working condition continuously. Oracle unreasonable availability implies that Oracle Clusterware displays and restarts faultfinding components if they stop, until you override the restart processing. The Oracle Clusterware and Oracle RAC besides 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 conclude clients. The scope of Oracle unreasonable 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 advantageous 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 drudgery 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 industry grid vision. services are entities so that you can outline in Oracle RAC databases. capabilities permit you to neighborhood database workloads and route the drudgery to the greatest situations that are assigned to manner the service. in addition, which you can employ services to define the resources that Oracle assigns to manner workloads and to panoply screen workload materials. purposes that you simply allot to features transparently acquire the described workload administration traits, including unreasonable 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 Place 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 drudgery that Oracle allocates to every available case 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 proffer the provider. you'll want to define the way you necessity connections to breathe balanced in the provider definition. despite the fact, you should nonetheless configure Oracle web capabilities. if you happen to allow the load balancing advisory, the Listener makes employ of the weight balancing advisory for connection load balancing.
This section introduces the storage alternatives for Oracle RAC and the setting up techniques for each Oracle Clusterware and Oracle RAC under the following theme 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 besides 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 rush because the paraphernalia 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 rush the Cluster Verification Utility (CVU) to obtain confident that your ambiance meets the Oracle Clusterware installation requirements. The OUI additionally immediately runs CVU at the conclude of the clusterware setting up to examine a considerable number of clusterware add-ons. The CVU simplifies the installation, configuration, and balanced administration of the Oracle Clusterware setting up system through making a choice 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 section 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 exploit 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 choice for typical redundant copies perquisite through the installing system, then Oracle Clusterware instantly keeps redundant copies of these information to steer clear of the info from fitting lone features of failure. The generic redundancy feature besides eliminates the want for third celebration storage redundancy options. for those who employ standard redundancy, Oracle Clusterware immediately continues two copies of the Oracle Cluster Registry (OCR) file and three copies of the voting Disk file.
note: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 lone aspects of failure. Oracle existent utility Clusters installation and Database creation procedure Description
The Oracle RAC application is disbursed as section 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 besides breathe called Oracle_home, it is wreck away other Oracle application working on the laptop. as a result of OUI is cluster-conscious, it installs the Oracle RAC software on every lone the nodes that you defined to breathe a section 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. perquisite through the installation, OUI runs DBCA to create your Oracle RAC database in line with the alternate options that you select. The DBCA besides runs the internet Configuration lieutenant (NETCA) to configure the community for your Oracle RAC ambiance.
Oracle recommends that you simply opt for ASM every lone through the installing to simplify storage management; ASM instantly manages the storage of every lone database info within disk companies. which you could additionally configure capabilities every lone 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 lone 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 suffer immense 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 accomplish 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 industry supervisor Grid control to accomplish 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 lone root scripts ought to suffer rush successfully on the node from which you're extending your cluster database. to obtain 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 modern 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 modern 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 rush the Oracle regular Installer (OUI) in clone mode as described in the Oracle usual Installer and OPatch user's e-book. Then rush the installing scripts and reiterate these steps on every node that you're adding. The procedure for cloning the Oracle home onto modern nodes is similar to the manner for cloning the Oracle Clusterware home. in addition, you must rush the Oracle net Configuration lieutenant (NETCA) on each modern node to create a Listener.
in case you suffer not already created a database, then that you could rush the Database Configuration lieutenant (DBCA) to create one. ultimately, keep the post-cloning procedures to finished the extension of your Oracle RAC atmosphere onto the brand modern nodes.extra concerns and lines for Oracle existent application Clusters
moreover configuring features to exploit your workloads, besides conform with using perquisite 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 lead 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 industry supervisor to create and adjust capabilities, and to rise and obviate the cluster database cases and the cluster database. industry manager has further elements as specific in the region "Overview of using enterprise manager with Oracle precise utility Clusters".
recovery supervisor (RMAN)—RMAN backs up, restores, and recovers datafiles, exploit 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 besides breathe dynamically allocated throughout every lone 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 region 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 suffer gaps within the sequence numbers. in case your environment can not tolerate sequence number gaps, then employ the NOCACHE choice 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 indigent upshot on efficiency in comparison to other caching and ordering mixtures.
Indexes—in case you employ indexes, believe options, reminiscent of invert key indexes, to optimize index efficiency. invert key indexes are exceptionally effectual if in case you suffer universal inserts to 1 side of an index, corresponding to indexes which are according to insert date.
This section describes the following Oracle RAC environment administration topics:Designing Oracle precise application Clusters Environments
accept as loyal with performing the following steps every lone the way through the design and construction of functions that you're deploying on an Oracle RAC database. account tuning:
The design and the utility
The memory and that i/O
The working device
observe:If an software does not scale on an SMP computer, then affecting 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 perquisite into a lone 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 ameliorate 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 paraphernalia for Oracle actual utility Clusters Environments
Oracle makes it feasible for you to administer a cluster database as a lone gadget image via enterprise manager, SQL*Plus, or via Oracle RAC command-line interfaces equivalent to Server control (SRVCTL). which you could besides 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 lone 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 lone advantageous every lone over pre-installation and perquisite 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 lone element. which you could employ SRVCTL to delivery and desist 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 instrument 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 instrument for both single-example Oracle databases and Oracle RAC environments so you might employ to designate 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 ingredient 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 suffer an upshot on the OCR.
web-based commercial enterprise supervisor Database manage and Grid exploit enable you to panoply screen an Oracle RAC database. The industry 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 industry manager Grid control to administer multiple Oracle RAC databases. besides keep 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. rush 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.
notice: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 comprise the automated Database Diagnostic video panoply (ADDM).
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 expand Oracle RAC database efficiency. here is especially loyal 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 achieve 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 repercussion to your latest functions
greater particular performance records
source: Oracle organization
November 15, 2010 08:00 ET
Simplifies Deployment of a incredibly available, Virtualized Database
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enjoyable blend of Virtualization and Clustering Speeds Time to Market and permits higher Availability
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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 amenable for multiple environments with hundreds of databases as well as Oracle existent Application Clusters (RACs) and Oracle Exadata, then OEM alone will not enable you to achieve your job effectively.Download PDF
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 exhibit last 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 184.108.40.206. 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 exclaim 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 suffer 32-bit Windows or Linux versions out -- just 64-bit Linux and a pair Solaris 64-bit versions."
Durrett added that his focus for US Foods is to upgrade its key systems to the most stable release of Oracle Database 11.2. Oracle 12c Database is further down the upgrade path.Pluggable Databases, now called Oracle Multitenant
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 forward 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 reclaim 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 arbitrator it's a Great 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 existent Application Clusters (RAC).
"We suffer some plans to employ this soon," he said.
Malcher added that modern security features in Oracle 12c Database are effortless to implement and "closer to the core of the database." One of them is called Oracle Advanced Security Data Redaction, which can conceal data from SQL query results prior to panoply based on factors such as a user's IP address.
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