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1Z0-048 exam Dumps Source : Oracle Database 10g R2: Administering RAC
Test Code : 1Z0-048
Test denomination : Oracle Database 10g R2: Administering RAC
Vendor denomination : Oracle
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brief setting up guide
10g unlock 2 (10.2) for Microsoft windows (x64)
Oracle Database brief installation e book, 10g free up 2 (10.2) for Microsoft windows (x64)
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This steer describes how to rapidly installation the Oracle Database client product on x64 windows programs. It contains suggestions in regards to the following:
assessment assistance About this e book
Log In to the gadget with Administrator Privileges
verify the Hardware requirements
check the software necessities
set up the Oracle Database utility
install products from the Oracle Database associate CD
This e book describes the artery to install Oracle Database using the default installing alternatives into a new Oracle domestic.
tasks Described in this e-book
The techniques in this ebook limn the artery to:
Configure your gadget to steer Oracle Database.
installation the Oracle Database utility on a indigenous file gadget.
Configure a widespread-aim Oracle database that uses the local file system for database file storage.
deploy software from the Oracle Database accomplice CD, which improves the performance of Oracle Database for your equipment.
outcomes of a a success installation
After you correctly installation Oracle Database:
The database that you created and the default Oracle internet listener process are working on the equipment.
Oracle enterprise supervisor Database manipulate and iSQL*Plus are working and can breathe accessed using an internet browser.
A single-node version of the Oracle Cluster Synchronization functions (CSS) daemon is running and is configured to start automatically when your gadget boots.
projects now not Described during this guide
This e book does not limn a artery to complete here tasks:
installation the utility on a device that has an latest Oracle software setting up.
installation Oracle Clusterware and Oracle existent application Clusters (RAC).
installation computerized Storage management (ASM)
Cloning an Oracle domestic
Enabling commercial enterprise manager e mail notifications or automatic backups.
the usage of option storage alternatives reminiscent of computerized Storage management (ASM) or uncooked gadgets for database storage.
where to gain additional installation counsel
For more precise assistance about setting up Oracle Database add-ons, together with assistance about the initiatives now not described during this ebook, observe one in All right here guides:
if you're installation the utility on a solitary rig or in case you need to installation automated Storage administration (ASM), observe Oracle Database installing e book for Microsoft windows (x64).
when you are setting up Oracle existent utility Clusters (RAC), observe Oracle Database Oracle Clusterware and Oracle actual utility Clusters installing e-book on your platform.
This steer besides describes the artery to set up Oracle Clusterware, which is a prerequisite for RAC installations.that you would breathe able to consume Oracle Clusterware with single-example Oracle Database installations as well.
each of these publications can breathe establish on the Oracle Database installation media. To entry them, consume a web browser to open the welcome.htm file within the database directory of the DVD, then pick the Documentation tab.
For greater suggestions about installation Oracle Database colleague CD accessories, observe considered one of right here publications:
These publications are available in the colleague directory on the Oracle Database installation media.2 Log In to the device with Administrator Privileges
go surfing as a member of the administrators group to the laptop on which to install Oracle accessories. if you're setting up on a main domain Controller (PDC) or a Backup zone Controller (BDC), log on as a member of the domain directors neighborhood.3 assess the Hardware necessities
right here hardware components are required for Oracle Database:
desk 1 Hardware necessitiesRequirement minimum price
physical reminiscence (RAM)
512 MB minimal, 2 GB recommended
Double the volume of RAM
total: 4.77 GB
See table 2 for particulars.
AMD64, or Intel extended reminiscence (EM64T)3.1 difficult Disk zone necessities
table 2 lists the house necessities for NTFS. The starter database requires 1.03 GB of disk space. The figures in this desk encompass the starter database. FAT32 space necessities are a bit of higher.
desk 2 Disk house necessities for NTFSinstalling category TEMP areaC:\software files\Oracle Oracle domesticDatafiles * complete
a hundred MB
4.seventy seven GB
superior installation: commercial enterprise version
a hundred twenty five MB
one hundred MB
three.5 GB *
1.05 GB *
4.77 GB **
advanced installation: common version
one hundred twenty five MB
three.5 GB *
1.05 GB *
four.seventy seven GB **
superior installing: personal edition
three.5 GB *
1.05 GB *
four.seventy seven GB **
* refers back to the contents of the admin, flash_recovery_area, and oradata directories within the ORACLE_BASE directory.
** This dimension will besides breathe higher reckoning on the installation options selected, such as languages or additional components. in case you pick to deploy Oracle Database with automated backups enabled, encompass at least 2 GB further for datafile disk space.
See additionally:"About NTFS File system and windows Registry Permissions" in Oracle Database Platform e-book for Microsoft home windows (x64)
To compose sure that the gadget meets these necessities, succeed these steps:
examine the actual RAM measurement. For a pc using windows 2003, as an instance, open rig in the home windows control Panel and select the common tab. If the measurement of the physical RAM installed in the device is below the mandatory size, then you definately ought to installation greater recollection before continuing.
assess the dimension of the configured digital recollection (also referred to as paging file measurement). For a computer the consume of home windows 2003, as an example, open device within the control Panel, opt for the superior tab, and click Settings in the efficiency section. Then opt for the advanced tab. The virtual reminiscence is listed within the virtual recollection area.
If indispensable, observe your working system documentation for suggestions about the artery to configure additional virtual reminiscence.
investigate the volume of free disk space on the equipment. For a pc the usage of home windows 2003, for example, open My desktop, right-click on the coerce the plot the Oracle utility is to breathe installed, and judge properties.
investigate the amount of disk space obtainable within the temp directory. here is corresponding to the replete volume of free disk space, minus what might breathe needed for the Oracle software to breathe establish in.
If there is less than one hundred twenty five MB of disk zone obtainable within the temp listing, then first delete All unnecessary info. If the temp disk zone is silent under a hundred twenty five MB, then set the TEMP or TMP atmosphere variable to point to a special challenging drive. For a pc the usage of windows 2003, as an instance, open system within the manage Panel, opt for the advanced tab, and click environment Variables.
table 3 lists the software requirements for Oracle Database.
desk 3 application necessitiesRequirement cost
Processor: AMD64, or Intel prolonged reminiscence (EM64T)
observe: Oracle gives 32-bit (x86), 64-bit (Itanium), and 64-bit (x64) types of Oracle Database for windows. The 64-bit (x64) database version, which this installation ebook describes, runs on the sixty four-bit version of home windows on AMD64 and EM64T hardware. Oracle gives restrained certification for 32-bit Oracle Database on sixty four-bit home windows (x64). For additional info, talk over with OracleMetaLink at:http://metalink.oracle.com
Oracle Database for x64 windows is supported on the following operating techniques:
windows Server 2003, typical x64 edition
home windows Server 2003, traffic x64 version
home windows Server 2003, Datacenter x64 version
home windows XP Profesional x64 version
windows Multilingual consumer Interface Pack is supported on windows Server 2003 and home windows XP expert.
here add-ons are supported with the home windows 2003 Microsoft Platform SDK or later compiler and Intel compiler 8.1:
GNU Compiler collection (GCC), kick Oriented COBOL (OOCOBOL) requisites, and pro*COBOL are not supported.
The Oracle web groundwork layer uses Oracle protocol benefit to talk with right here industry-regular network protocols:
TCP/IP with SSL
Oracle Database client
in case you blueprint to connect to Oracle Database 10g free up 2 (10.2) from a free up of Oracle Database client it really is earlier than 10g unencumber 2 (10.2), you aren't able to attain so if here circumstances exist:
Oracle Database customer is operating on the identical computing device as Oracle Database 10g unlock 2 (10.2).
Microsoft windows Terminal services is not working on the equal laptop as Oracle Database customer. customarily, Terminal features is installed and configured with Microsoft home windows 2003, but on home windows XP it may not breathe installed or enabled.
Oracle Database client is edition 8.0, 9.0–220.127.116.11, or 10.1–10.1.0.3.
Oracle Database client is not working as Administrator.
To remedy this difficulty, upgrade Oracle Database client by using the newest Oracle Database household patchset (18.104.22.168, or 10.1.0.four or later). you could download the patchset from the Patches and Updates section of OracleMetaLink at:http://metalink.oracle.com 5 deploy the Oracle Database software
To install the Oracle Database application:
if you're installation Oracle Database on a multihomed laptop or a computer that makes consume of multiple aliases, consume the system within the control Panel to create the ORACLE_HOSTNAME device environment variable. Set this variable to point to the host identify of the desktop on which you are installing Oracle Database.
Insert Oracle Database installation media and navigate to the database directory. alternatively, navigate to the listing where you downloaded or copied the installation information.
Use the identical installing media to install Oracle Database on All supported windows systems.
Double-click setup.exe to birth Oracle typical Installer.
in the Welcome window, opt for both simple installing or advanced installing, after which retort the prompts as needed.
See also:Chapter 1 in Oracle Database setting up e-book for Microsoft windows (x64) for more information on the fundamental and superior installing methods
the subsequent home windows that seem, which are listed in table 4, depend upon the setting up formulation you fill chosen. The order in which the home windows look is dependent upon the alternatives you select.
observe these instructions to comprehensive the installing:
do not set up Oracle Database 10g unencumber 2 (10.2) application into an latest Oracle domestic that contains Oracle9i or prior application.
if you installation Oracle Database 10g unlock 2 (10.2) in an Oracle domestic directory that already contains Oracle Database 10g unencumber 2 (10.2) customer application, the listener is not created. To create the listener, installation and press Oracle web Configuration lieutenant after the installing. If the Administrator client is establish in earlier than Oracle Database, Oracle net Configuration lieutenant is already establish in.
follow the guidelines displayed within the Oracle accepted Installer home windows. if you would relish more information, click on support.
When triggered for a password, succeed these instructions:
Make the password breathe between 4 and 30 characters lengthy.
Use the database character set for the password's characters, which could consist of the underscore (_), dollar ($), and pound signal (#) characters.
do not delivery passwords with a numeral.
do not consume a person identify for a password.
do not consume Oracle reserved words for the password.
don't consume change_on_install for the SYS account password.
don't consume manager for the gadget account password.
do not consume sysman for the SYSMAN account password.
don't consume dbsnmp for the DBSNMP account password.
in case you pick to consume the identical password for All of the accounts, attain not consume change_on_install, manager, sysman, or dbsnmp as a password.
Have the password involve as a minimum 1 alphabetic, 1 numeric, and 1 punctuation cost persona
don't consume yardstick or evident phrases, equivalent to welcome, account, database, and person for the password.
observe:You fill to bethink the passwords that you just specify.
do not modify the Java Runtime ambiance (JRE) apart from by using a patch provided by using Oracle uphold functions. Oracle time-honored Installer immediately installs the Oracle-presented edition of the JRE. This edition is required to press Oracle typical Installer and a few Oracle assistants.
if you stumble upon mistakes whereas setting up or linking the software, observe Appendix G in Oracle Database setting up ebook for Microsoft home windows (x64) for information about troubleshooting.
if you chose an installing classification that runs Database Configuration lieutenant and Oracle web Configuration lieutenant in interactive mode, you should provide specific counsel about configuring your database and community.
in order for you information when using the Database Configuration lieutenant or Oracle web Configuration lieutenant in interactive mode, click aid on any window.
observe:in case you selected a default installation, Database Configuration lieutenant and Oracle web Configuration lieutenant press non-interactively.
When the configuration tools finish, click on Exit, then click on sure to exit from Oracle common Installer.
When Oracle traffic supervisor Database manipulate opens an internet browser, enter the username and password you created during the installation.
that you could log in as SYS, device, or SYSMAN. in case you log in as SYS, then you ought to connect AS SYSDBA. Enter the password you exact for the account All over setting up.
Optionally, delete the OraInstalldate_time directory if you need to gain rid of the brief information that were created All the artery through the installation method. The OraInstalldate_time listing holds about forty five MB of files. This listing is created in the region set by the TEMP atmosphere variable setting.
Restarting your computer additionally removes the OraInstalldate_time directory.
See Chapter 4 in Oracle Database installation ebook for Microsoft windows (x64) for advice about postinstallation projects that you must finished after getting establish in Oracle Database.
desk four Oracle common Installer monitorsscreen counseled motion
opt for installing components
choose certainly one of right here, then click on subsequent:
simple installation: allows you to right away install Oracle Database the usage of minimal enter. It installs the application and optionally creates a regularly occurring-goal database the usage of the assistance that you just specify on this window.
advanced installation: permits you to perform greater complicated installations, reminiscent of developing particular person passwords for several money owed, creating specific forms of starter databases (as an example, for transaction processing or data warehouse methods), the usage of diverse language organizations, specifying email notifications, and so forth.
select installing classification
select enterprise version, yardstick edition, personal version, or customized. click on next.
Specify home particulars
within the destination area, settle for the default values or enter the Oracle domestic identify and directory direction wherein to installation Oracle accessories. The directory route may silent no longer involve areas.
click on subsequent.
attainable Product add-ons
if you selected custom for the installing type, this window seems. select from the listing and click next. To gain learning of more about each and every component, position the mouse over the component's name.
Product-selected Prerequisite exams
This window tests that your gadget meets the minimal necessities for the installing. click on subsequent.
upgrade an current Database
when you've got a previous updatable version of Oracle Database or automated Storage management establish in, this window looks. For in-place database installations the plot computerized Storage management is operating, ASM is upgraded instantly.
click on sure in case you wish to better or No if now not. in case you click sure, the abstract window looks subsequent.
For extra counsel on upgrades, check with Oracle Database better ebook.
choose Configuration alternative
select considered one of the following:
Create a database: opt for this preference if you're making a database the usage of the following database kinds: confidential aim, Transaction processing, records warehousing. The superior alternative starts Database Configuration lieutenant for superior database advent configuration alternate options.
Configure automatic Storage administration (ASM): select this alternative to create an automatic Storage administration instance handiest. To create an ASM instance, you need to provide an ASM SYS Password. After you deliver this password, Oracle everyday Installer permits you to create an ASM disk community. After you finished this Oracle yardstick Installer session, you could press it again to deploy and configure one or extra Oracle databases a expedient artery to consume ASM.
installation database utility only: pick this preference to install the database application handiest but no longer create a database or configure computerized Storage management.
select ASM management option
if you selected Configure automatic Storage administration (ASM) from the select Configuration alternative window, and when you've got Oracle traffic manager 10g Grid control establish in, this window appears. pick sure or No, depending on if you want to consume Grid manage to manage automated Storage management. in case you opt for sure, then select from the listing of commercial enterprise administration brokers to compose consume of.
Configure computerized Storage administration
seems in case you chosen Configure automatic Storage administration (ASM) from the opt for Configuration preference window. Enter the disk group name. The disk neighborhood checklist indicates each candidate and member disks; which you could click on panoply Candidates or note All to filter their reveal. Then pick the disk community's redundancy stage and its member disks.
For Redundancy degree, opt for one of here. The default is regular redundancy.
high: The contents of the disk group are three-way mirrored through default. To create a disk community with extreme redundancy, specify as a minimum three failure businesses (no less than three devices).
normal: by using default the datafiles of the disk neighborhood are two-manner mirrored and the control data are three-method mirrored. that you can create certain data which are three-way mirrored or no longer mirrored. To create a disk community with common redundancy, specify at least two failure companies (a minimum of two instruments) for 2-method mirroring.
external: ASM does not replicate the contents of the disk neighborhood. opt for this preference when 1) the disk neighborhood carries instruments, reminiscent of RAID instruments, that provide their personal statistics insurance plan; or 2) the database doesn't require uninterrupted entry to records, as an instance, you probably fill a suitable backup approach already in location.
choose Database Configuration
choose the database configuration that top-rated meets your wants: well-known aim, Transaction Processing, facts Warehouse; superior.
See the online aid offered through both Oracle established Installer or Database Configuration lieutenant for an contour of these preconfigured database varieties.
click on next.6 install items from the Oracle Database associate CD
The Oracle Database colleague CD consists of products that enhance the efficiency of or complement Oracle Database. for most installations, Oracle recommends that you install Oracle Database 10g items from the companion CD.7 What's next?
To become universal with this free up of Oracle Database, Oracle means that you complete the following initiatives:
Log in to Oracle traffic supervisor Database manage using a web browser.
Oracle enterprise manager Database control is an internet-primarily based utility that you should consume to manage a solitary Oracle database. The default URL for Database manipulate is:http://host.domain:port/em/
Log in with the user identify SYSMAN. consume the password that you unique for this consumer right through the Oracle Database installation.
See Chapter 4 of Oracle Database installing steer for Microsoft windows (x64) for suggestions about required and optional postinstallation tasks, reckoning on the add-ons that you need to use.
evaluation Chapter 5 of Oracle Database installing e-book for Microsoft windows (x64) for assistance about how to gain began the consume of Oracle Database.
examine Oracle Database 2 Day DBAOracle Database 2 Day DBA ebook, to learn extra about using Oracle traffic supervisor Database manage to administer a database.
This e-book, designed for brand new Oracle DBAs, describes the artery to consume Oracle enterprise manager Database manipulate to control All facets of an Oracle database installation. It besides gives assistance about the artery to permit e-mail notifications and automated backups, which you may now not fill configured throughout the setting up.
This section contains assistance about the following:
you are welcome to deploy and account the items included during this media pack for 30 days below the phrases of the trial License agreement. however, you should purchase a software license in case you want to continue the consume of any product after the 30 day assessment period. observe the following zone for counsel about purchasing software licenses.
See additionally:Oracle Database Licensing tips
paying for Licenses, version Updates, and Documentation
You can buy software licenses, up to date types of Oracle products, and printed versions of Oracle documentation from the Oracle shop net web site:http://oraclestore.oracle.com/
Contacting Oracle benefit functions
if in case you fill bought Oracle Product help, which you could denomination Oracle benefit capabilities for counsel 24 hours a day, seven days every week. For information about procuring Oracle Product uphold or contacting Oracle benefit functions, depart to the Oracle steer capabilities net web page:http://www.oracle.com/aid/
finding Product Documentation
Documentation for Oracle items is accessible in both HTML and Adobe moveable doc format (PDF) codecs from a pair of areas:
On disks within the media pack:
Platform-specific documentation is available on the setting up media. To entry the documentation, observe the welcome.htm file observed within the top-level listing of the DVD.
general product documentation is purchasable on the Oracle Documentation Library on the DVD.
From the Oracle know-how network net website:http://www.oracle.com/know-how/documentation/
To view PDF files, down load the free Adobe Acrobat Reader from the Adobe internet site, if crucial:http://www.adobe.com/ 9 Documentation Accessibility
Our purpose is to compose Oracle products, features, and supporting documentation purchasable, with expedient usability, to the disabled community. To that conclusion, their documentation includes elements that compose guidance available to clients of assistive expertise. This documentation is attainable in HTML structure, and contains markup to facilitate entry by using the disabled group. Accessibility necessities will proceed to evolve over time, and Oracle is actively engaged with different market-main technology vendors to tackle technical obstacles so that their documentation may besides breathe available to All of their customers. For extra information, consult with the Oracle Accessibility application net web page at
Accessibility of Code Examples in Documentation
reveal readers may additionally now not at All times appropriately study the code examples during this document. The conventions for writing code require that closing braces should look on an in any other case void line; although, some panoply readers may now not All the time study a line of textual content that consists fully of a bracket or brace.
Accessibility of links to exterior internet websites in Documentation
This documentation may additionally contain hyperlinks to internet websites of alternative companies or groups that Oracle doesn't own or manage. Oracle neither evaluates nor makes any representations regarding the accessibility of these internet sites.
TTY entry to Oracle aid capabilities
Oracle offers committed textual content mobilephone (TTY) access to Oracle benefit features within the united states of the united states 24 hours a day, seven days a week. For TTY support, summon 800.446.2398.
This doc contains the following sections:
Accessibility directions - Delete This zone After reading
TTY entry to Oracle aid services
We’ve covered loads of new performance during this collection. Some if it you’ll consume promptly. other bits you’ll wait ages.
in spite of everything, in the event you upgrade to 12.2 you’ll want to examine All your code to ensure it really works as expected. Which brings the query:
“How a expedient deal of my code did the tests definitely run?”
insurance metrics will uphold immensely with this.
essential line stage evaluation of the exams isn’t respectable ample. to peer why, believe here code:
we've a basic feature that returns its argument and calls dbms_output.
The system calls the duty twice in a solitary if remark:create or supersede characteristic f (p int) revert int as originate dbms_output.put_line('done: ' || p); revert p; end; / create or supersede manner p is originate if f(1) = 1 or f(2) = 2 then dbms_output.put_line('this'); else dbms_output.put_line('that'); conclusion if; finish p; /
because of brief-circuit assessment, f(2) isn't achieved! that you could observe this from the output:SQL> exec p; finished: 1 this
anything working at the line degree will incorrectly file this as entirely covered.
to beat this, you need to particulars of “simple block” executions.
So what's a “fundamental block”?
It’s a bit of code that you simply both runs absolutely or now not at all. Code All the time belongs to exactly one fundamental block. as an example:if f(1) = 1 or f(2) = 2 then dbms_output.put_line('this'); else dbms_output.put_line('that'); finish if;
has 4 fundamental blocks. One for each denomination to f and two for the calls to dbms_output.put_line.
the brand new code coverage functionality measures and experiences on these fundamental blocks.
the consume of it's convenient. First you should create coverage tables to shop the metrics:exec dbms_plsql_code_coverage.create_coverage_tables;
Then denomination start_coverage earlier than your check and stop_coverage after:declare run_id pls_integer; originate run_id := dbms_plsql_code_coverage.start_coverage('look at various'); p; dbms_plsql_code_coverage.stop_coverage; end; /
that you would breathe able to then gain metrics by artery of querying the dbmspcc* tables that cling these details:choose proprietor, name, classification, round( ( sum(coated)/count(*) * one hundred), 2) pct_covered from dbmspcc_runs r associate dbmspcc_units u on r.run_id = u.run_id breathe a section of dbmspcc_blocks b on r.run_id = b.run_id and u.object_id = b.object_id where r.run_comment = 'check' neighborhood by using proprietor, name, category; owner identify category PCT_COVERED ----- ----- ---------- ----------- CHRIS P technique 50 CHRIS F characteristic a hundred
here's All smartly and good. but there’s All the time some code which your assessments don’t cover. maybe it’s deprecated, so that you don’t want test it. Or it’s “just-in-case” code to cover theoretically feasible but essentially unimaginable circumstances. Such because the infamous “when others” exception handler.
You wish to exclude these sections out of your experiences. fortunately which you can with the coverage pragma. by marking strains as “NOT_FEASIBLE” that you can filter these out of your experiences:create or supersede manner p is start if f(1) = 1 or f(2) = 2 then dbms_output.put_line('this'); else pragma insurance ('NOT_FEASIBLE'); dbms_output.put_line('that'); finish if; finish p; /
Rerun the exams and you may cloak the untestable materials on your document!choose owner, name, type, round( ( sum(lined)/count(*) * a hundred), 2) pct_covered from dbmspcc_runs r breathe section of dbmspcc_units u on r.run_id = u.run_id breathe a section of dbmspcc_blocks b on r.run_id = b.run_id and u.object_id = b.object_id where r.run_comment = 'examine' and b.not_feasible = 0 neighborhood through proprietor, identify, classification; proprietor identify class PCT_COVERAGE ----- ---- --------- ------------ CHRIS P manner 66.sixty seven CHRIS F feature a hundred
in case you really want, that you can exclude total sections of code through wrapping it in two insurance pragmas. the primary starting NOT_FEASIBLE_START, the 2nd NOT_FEASIBLE_END:start Spragma coverage ('NOT_FEASIBLE_START'); a_section(); of_untestable_code(); pragma insurance ('NOT_FEASIBLE_END'); conclusion; /
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The introduction of the Oracle Grid Infrastructure product essentially combines Automatic Storage Management (ASM) and Oracle Clusterware into the identical oracle home and product. With this new configuration, five main changes fill been incorporated into Oracle Database 11g RAC. Read on to learn more.
With the release of Oracle Database 11g R2 a fundamental change was made that impacts a existent Application Cluster (RAC) based system. The occasions of these changes is the introduction of the Oracle Grid Infrastructure product, which essentially combines Automatic Storage Management (ASM) and Oracle Clusterware into the identical oracle home and product.
ASM was previously incorporated into the Oracle Database home and binaries, and Oracle Clusterware was a stand-alone product installed with its own home and binaries.
With this new configuration, five main changes fill been incorporated into Oracle Database 11g RAC. These changes involve installing and working with Grid Infrastructure, which includes setting up and configuring ASM; solitary Client Access Names (SCAN), RAC One Node, Automatic Workload Balancing and the ASM Cluster File System (ACFS).Single Client Access denomination (SCAN)
SCAN simplifies the activities involved in adding and removing nodes from a RAC environment by configuring a solitary connection setting for All clients to consume when connecting to a RAC database. Connections consume EZconnect methodology to connect to the database regardless of which host machines the instances are currently running on.
For more information on solitary Client Access Names you can view my article on SCAN by clicking here solitary Client Access NameRAC One Node
RAC One Node is a feature available with Oracle 11gR2 that essentially allows you to press a solitary instance database in a cluster and seize advantage of the tall availability and failover capabilities of Oracle RAC.
The database needs to breathe built as a "RAC" database, however, rather than selecting multiple nodes when running DBCA, the DBA would select to fill only one node running one instance for the database.
If anything happens, the solitary instance can breathe migrated over to another node on the existing cluster. Even sessions can breathe automatically failed over to the new instance if Transparent Application Failover has been configured.
On Linux, a patch may need to breathe applied to the Oracle home prior to structure the database. (RACONENODE_p9004119_112010_LINUX.zip). For more information on managing a RAC One Node Database, observe Administering Oracle RAC One Node.Oracle Grid Infrastructure
The Oracle Grid Infrastructure is a divorce set of binaries from the Oracle Database software. It incorporates volume management functionality, file system functionality and the cluster management software. Essentially, Oracle Grid Infrastructure combines three products into one solitary Oracle Home. These three pieces are Oracle Clusterware, Automatic Storage Management (ASM) and the ASM Cluster File System (ACFS). In previous releases, Oracle Clusterware and ASM were installed into divorce Oracle homes. ASM was included as section of the Oracle Database binaries, and Oracle Clusterware was a divorce install. ACFS is new in Oracle 11g R2.
The Clusterware component of the Grid Infrastructure includes Cluster Management Services (known as Cluster Ready Services (CRS) in previous releases) and tall Availability Services for both Oracle and other third party products. Installing Oracle Clusterware is a prerequisite activity for working with Oracle RAC.
Starting with Oracle 11g R2, ASM disks can breathe used for the clusterware files (OCR and voting disk). In previous releases, the OCR and Voting disk files had to breathe on raw partitions or a divorce cluster file system.
ACFS is a common cluster file system that can breathe used for any character of data files.
The combination of these three components of the Oracle Grid Infrastructure now provides the primary foundation for Oracle 11g R2 RAC databases.
The six primary functions of Oracle Clusterware are Cluster Management, Node Monitoring, Event Services, Network Management, Time Synchronization and tall Availability.
Cluster Management allows the cluster resources (such as databases, instances, listeners, services, etc.) to breathe monitored and managed from any node that is section of the defined cluster.
Node Monitoring is the "heartbeat" check of the nodes (and the resources running on them) to compose sure they are available and functioning properly.
Event Services is the tall availability messaging and response functionality for RAC.
Network Management involves managing the Virtual IP (VIP) addresses that are associated with the cluster and provides the consistent access to the RAC database regardless of the systems hosting it.
Time Synchronization is a new feature in Oracle 11g R2 that automatically synchronizes the timestamps of All of the nodes in the cluster. In previous releases, third party tools were generally used. Time Synchronization can breathe used in observer mode (if a Network Time Protocol is already in place) or active mode where one node is designated as the master node and All of the others are synchronized to it.
High Availability services monitor and restart any of the resources being managed by Oracle Clusterware.
For additional information about installing the Oracle Grid Infrastructure on Linux, observe the Oracle Grid Infrastructure Installation Guide,Automatic Workload Management (Policy Managed Databases)
In prior releases of Oracle RAC, the DBA would explicitly manage which nodes of a cluster would breathe used to press the various instances associated with a RAC database. Additionally, database services would breathe manually configured with preferred and available nodes, which facilitated the balancing of connections and failover of the services in a RAC environment.
In Oracle Database 11 g R2, a DBA can now configure a feature called policy-based management. This involves defining a server pool with the options of a minimum number of servers, a maximum number of servers and an moment level. The database itself would then breathe associated with a server pool rather than a specific set of nodes. This would allow Oracle to dynamically deliver services based on the total resources available to the cluster.
For example, if a cluster consisted of eight nodes in total and supported three RAC databases. Each database would breathe defined with a minimum and maximum number of servers. Let's assume that DB1 is defined with a minimum of 4 and a maximum of 6 with an moment of 10, DB2 is defined with a minimum of 2 and maximum of 3 and an moment of 7, and DB3 is set to a minimum of 2 and maximum of 3 with an moment of 5.
Initially the 8 nodes could breathe configured as nodes 1-4 allocated to DB1, nodes 5-6 allocated to DB2 and nodes 7-8 allocated to DB3. If node 3 failed for some reason, the system would allocate node 7 or 8 to DB1 because it has a higher moment than DB3 and a minimum requirement of 4 servers, even though it would occasions DB3 to descend below the minimum number of servers. If node 3 is re-enabled it would breathe allocated immediately to DB3 to bring that database back to its minimum required servers.
If a 9th node were added to the cluster, it would breathe assigned to DB1 because of the moment factor and the fact that DB1 has not yet hit its maximum number of servers.
For more information on policy-managed databases, observe the Oracle existent Application Clusters Administration and Deployment Guide.ASM Cluster File System (ACFS)
ACFS is a multi platform cluster file system that has been designed to press on any platform that is supported by ASM rather than being specific to any one platform as some of the third party products are.
ACFS uses a file character called a dynamic volume, which can breathe used as a volume for a regular file system. The ASM Dynamic Volume Manager provides the interface between the dynamic volumes and the ACFS.
ACFS besides provides a snapshot utility that does version enabling of the file system. These snapshots are online point-in-time copies of the ACFS. The storage for the snapshots is managed within ACFS and is very space efficient. Before any file is modified in ACFS, a copy is saved as a snapshot. The snapshot copies are designed to only capture the changed data. Snapshots can besides breathe created on demand to provide consistent views of the ACFS system.
While ACFS can breathe used to store most files associated with Oracle, it must breathe renowned that the Oracle Grid Infrastructure binaries themselves cannot breathe stored in ACFS. They must breathe installed locally on each node in the cluster.
All of the necessary services to manage ACFS systems are automatically managed by Oracle Clusterware. observe the Oracle Automatic Storage Management Administrator's steer for more information about ACFS.Conclusion
Overall, since first releasing existent Application Clusters back with Oracle Database 9i it has been their premier tall availability solution for databases. They fill continued to add functionality and improvements over the Oracle releases since that date, and Oracle 11G R2 is no exception.
» observe All Articles by Columnist Karen Reliford
Oracle on Tuesday is launching version 11g Release 2 of its database, about two years after the initial version hit the market.
The new release is the product of some 1,500 developers and 15 million hours of testing, according to cost Townsend, vice president of database product management.
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One major piece is Oracle's optional existent Application Clusters (RAC) technology, which allows database workloads to breathe deployed across a pool of commodity hardware. This increases reliability because other servers pick up the slack in the event one fails, and the system can breathe scaled by adding more servers.
Customers can consume 11g R2 to more easily pledge specific groups of server nodes to various application workloads, such as a "front office" resource pool which supports CRM (customer relationship management) implementations and Web sites, according to an Oracle whitepaper. When a particular pool needs additional horsepower, it can draw from unassigned nodes, or nodes can breathe drawn from pools with lower demands.
The new release besides features a new option, Oracle RAC One Node, which is aimed at less mission-critical applications, according to the paper.
The database's Automated Storage Management feature besides gets an upgrade in 11g R2. "Intelligent data placement" capabilities establish rarely used data on disks' inner rings, while information needed more often is stored on the outer rings, boosting performance, according to Oracle.
Other improvements involve advanced data partitioning capabilities for easier management of large data sets. Users can now perform online application upgrades.
Many new aspects of 11g R2 are included with an Enterprise Edition database license, which lists for US$47,500 per processor license. RAC One Node, relish RAC itself, is optional, and pricing has not yet been finalized, Townsend said.
Overall, Oracle expects the new features to prompt widespread adoption of 11g, Townsend said. Many Oracle shops are silent on older versions, such as 10g.
Tracking adoption is a "black art," Townsend said, but Oracle estimates between 10 percent and 20 percent of its database customers are using 11g Release 1.
Initially 11g R2 will uphold Linux, Townsend said. uphold for "all major UNIX platforms," which would involve the Solaris operating system Oracle will acquire through its pending purchase of Sun Microsystems, will likely arrive this year, followed by Windows, he said. No timetable was available for Windows support.
Users and industry observers await the update to breathe warmly received.
"With every major release of Oracle, the second is the most distinguished one," said Paul Vallée, executive chairman and founder of the Pythian Group, an Ottawa, Ontario, database administration outsourcing company. "It doesn't matter how far back you go. This is where the software comes into its own."
Another user echoed Vallée.
"I felt that Oracle 11g R1 was a reasonably solid project," said Ian Abramson, president of the Independent Oracle Users Group, via e-mail. "[But] people will now feel more confident with this release as it has had time to ripen and gain stability."
Meanwhile, the new features are "all at the heart of what customers need," said Forrester Research analyst James Kobielus. "A grandiose many Oracle customers fill already migrated to 11g or are on 10g and making ponderous consume of RAC. Every solitary one of them ... will undoubtedly breathe avidly adopted by core enterprise customers for the most demanding apps. ... I wouldn't mumble any of these are bells and whistles."
It remains to breathe seen how Oracle's pending deal to buy Sun Microsystems will alter its overall database strategy, since the deal would involve the well-liked open-source MySQL database.
The Sun deal could besides affect Oracle's Exadata data warehousing product line, which was announced to much fanfare at eventual year's OpenWorld conference. The line employs Hewlett-Packard ProLiant servers and Oracle software.
It's not inconceivable that Oracle will demolish with HP and revamp Exadata using Sun servers, in Vallée's view.
"Oracle will breathe able to recreate the [Exadata] roadmap on their own hardware," he said.
Cluster Ready Services (CRS) has been introduced in Oracle 10g existent Application Clusters (RAC) to provide a yardstick cluster interface on All platforms, enabling improved high-availability operations. CRS should breathe installed prior to installing 10g RAC in a HOME other than ORACLE_HOME.
There are several combinations with respect to installing RAC in your environment. To denomination but a few of the most common scenarios: You can attain a fresh installation, transmogrify a standby database on Data Guard to RAC, and upgrade existing RAC instances. Oracle recommends the consume of DBCA to create new databases, which was covered in Chapter 2, "Installing Oracle Database 10g." Hence, they will focus here on performing a new manual installation of RAC.Manual Installation of RAC Instance
For a manual installation of a RAC instance, succeed these steps:
Start the installation process by making a copy of initSID.ora in your $ORACLE_HOME/dbs directory on UNIX platforms or in $ORACLE_HOME\database on Windows platforms. If you are using an SPFILE, create an initSID.ora file, edit it, and point your SPFILE to it or consume alter system set... commands to change the instance-specific parameters. compose sure that your control file is pointing to an existing raw device or cluster file system location. For the entire example, they will summon their database as Q0RAC and summon their instances Q0RAC1 and Q0RAC2 on nodes 1 and 2.
Make changes to the path, filenames, and sizes as needed to suit your installation. Cluster-wide parameters for the Q0RAC database would breathe as follows:db_block_size=8192 db_cache_size=104857600 background_dump_dest=/opt/app/oracle/product/10.0.1/rdbms/log core_dump_dest=/opt/app/oracle/product/10.0.1/rdbms/log user_dump_dest=/opt/app/oracle/product/10.0.1/rdbms/log timed_statistics=TRUE control_files=("/dev/Q0RAC/control_01.ctl", "/dev/Q0RAC/control_02.ctl") db_name=RAC shared_pool_size=104857600 sort_area_size=1638400 undo_management=AUTO cluster_database=true cluster_database_instances=2 remote_listener=LISTENERS_Q0RAC
For the Q0RAC1, instance-specific parameters will breathe as follows. Add the listener address to your tnsanames.ora file for the local_listener parameter on node 1 and 2:instance_name=Q0RAC1 instance_number=1 local_listener=LISTENER_Q0RAC1 thread=1 undo_tablespace=UNDOTBS
Connect to the database using SYS (as SYSDBA) and execute the following SQLPlus command:SQL> startup nomount
Create the database using pre-created raw devices:create database Q0RAC controlfile reuse maxdatafiles 250 maxinstances 32 maxloghistory 100 maxlogmembers 5 maxlogfiles 128 datafile ‘/dev/q0rac/system_01.dbf’ size 900m segment space management auto reuse autoextend on next 10240k maxsize unlimited undo tablespace "undotbs" datafile ‘/dev/q0rac/undotbs_01.dbf’ size 200m reuse default tablespace user_default datafile ‘/opt/app/oracle/racdb1/user_default_1.dbf’ size 2000m reuse segment space management auto sysaux datafile ‘/opt/app/oracle/racdb1/sysaux_1.dbf’ size 500m reuse segment space management auto character set us7ascii logfile group 1 (‘/dev/q0rac/redo1_01.dbf’) size 100m reuse, group 2 (‘/dev/q0rac/redo1_02.dbf’) size 100m reuse;
Create temporary tablespace:create temporary tablespace "temp_q0rac" tempfile ‘/dev/q0rac/temp_01.dbf’ size 40m reuse;
Create a second UNDO tablespace as follows:create undo tablespace "undotbs2" datafile ‘/dev/q0rac/undotbs_02.dbf’ size 200m reuse next 5120k maxsize unlimited;
Edit initSID.ora and set confiscate values for the second instance on node 2.instance_name= Q0RAC2 instance_number=2 local_listener=LISTENER_Q0RAC2 thread=2 undo_tablespace=UNDOTBS2
From Q0RAC1 (the first instance), press the following command:alter database add logfile thread 2 group 3 (‘/dev/Q0RAC/redo2_01.dbf’) size 100M, group 4 (‘/dev/Q0RAC/redo2_02.dbf’) size 100M; alter database enable public thread 2;
You can besides install a RAC instance using Data Guard, but it will breathe more complicated than the manual installation. The steps are too elaborate to breathe discussed within the limited scope of this chapter. mention to Oracle Data Guard Concepts and Administration 10g and MetaLink Note #273015.1 for more details.
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