|Exam Name||:||Oracle 9i: New Features for Administrators|
|Questions and Answers||:||215 Q & A|
|Updated On||:||April 24, 2019|
|PDF Download Mirror||:||Pass4sure 1Z0-030 Dump|
|Get Full Version||:||Pass4sure 1Z0-030 Full Version|
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The average pay for an Oracle Database Administrator (DBA) with Oracle DB 8i/9i/10g/ 11i abilities in Sydney, New South Wales is pay per hour.
The common pay for an Oracle Database Administrator (DBA) with Oracle DB 8i/9i/10g/ 11i advantage in Sydney, New South Wales is AU$98,852 per yr.Job Description for Oracle Database Administrator (DBA)
Oracle database directors are answerable for designing, conserving and making certain that the business's Oracle database runs easily; they are often liable for other databases as neatly. These directors work alongside other IT specialists, office group of workers and department heads, and that they oversee database assistants. Oracle database directors work with computer systems and laptop programs daily, running dissimilar screens and methods to check their accuracy and workability, as well as troubleshoot any mistakes discovered. typical projects include writing code for a program, checking out it to make certain it really works, and enforcing it into their company software. They may additionally cope with issues in present utility and collaborate with different employees in the enterprise to assess what adjustments, if any, need to be made.read more...
Oracle database administrators typically have a bachelor's diploma in computing device science or a linked container, and some jobs require the applicant to be an authorized Oracle skilled. Oracle database directors work above all with home windows operating programs and must be ordinary with their use, as well as have journey with Linux or Unix programming. They may additionally work for any huge or small agencies that use laptop classes for his or her day-to-day business; this may additionally consist of healthcare companies, executive corporations, organizations in the expertise industry, start-u.s.and universities, among other employers. They work indoors in an office surroundings during ordinary business hours, although they could be referred to as in for emergencies or complications with the gadget all through off-hours. (Copyright 2019 PayScale.com)
Oracle Database Administrator (DBA) tasks
this article provides the procedures for converting Oracle 9i (9.2.0.four) RAC to Oracle 10g (10.2.0.1) RAC on pink Hat enterprise Linux three (RHEL3).
Oracle Database 10g and Oracle actual utility Cluster (RAC) 10g itself, boast many new and entertaining points that simplify database manageability and provide greater availability and scalability. compared to its predecessors, Oracle 10g RAC is a whole lot more straightforward to set up, use and manipulate, thereby decreasing the entire cost of ownership.Overview
The RAC cluster comprises two Intel x86 servers working on RHEL3 (Kernel 2.four.21-27). each node has access to a shared storage and connectivity to the public and personal community.
this article is structured into here steps:
1. Preliminary Installation2. install Oracle Clusterware3. install Oracle RAC Software4. upgrade the Database5. Migrate Database to ASM (not obligatory Step)
unless otherwise special, be sure you execute all steps on both nodes.
right here's an outline of our Oracle 9i RAC atmosphere:
Database File Storage
And a top level view of the Oracle 10g RAC ambiance:
Database File Storage
Oracle Cluster Registry
OCFSStep 1: Preliminary installation1a. check software equipment types
set up the necessary programs. more information can also be bought from http://down load-east.oracle.com/docs/cd/B19306_01/deploy.102/b14203/prelinux.htm#sthref380
determine here kernel parameters. additional information may also be got from http://down load-east.oracle.com/medical doctors/cd/B19306_01/install.102/b14203/prelinux.htm#sthref418[root@salmon1]# sysctl -a | grep shm kernel.shmmni = 4096 kernel.shmall = 2097152 kernel.shmmax = 2147483648 [root@salmon1]# sysctl -a | grep sem kernel.sem = 250 32000 100 128 [root@salmon1]# sysctl -a | grep -i ip_local web.ipv4.ip_local_port_range = 1024 65000 [root@salmon1]# sysctl -a | grep -i file-max fs.file-max = 65536 [root@salmon1]# sysctl -a | egrep "rmem_default|rmem_max|wmem_default| wmem_max" internet.core.rmem_default = 262144 web.core.wmem_default = 262144 web.core.rmem_max = 262144 web.core.wmem_max = 262144 1c. check clients and organizations
determine that the oracle user primary community is oinstall and the secondary neighborhood is dba.[root@salmon1]# identification oracle uid=500(oracle) gid=501(oinstall) corporations=501(oinstall),500(dba) verify that the person nobody exists on the node. [root@salmon1]# identity nobody uid=ninety nine(no person) gid=99(no one) corporations=99(no one) 1d. Edit the oracle person ambiance file
determine that the oracle user primary neighborhood is oinstall and the secondary community is dba.[oracle@salmon1]$ more .bash_profile # .bash_profile # Get the aliases and functionsif [ -f ~/.bashrc ]; then . ~/.bashrc fi export direction=$route:$domestic/bin export ORACLE_SID=prod1a export ORACLE_BASE=/u01/app/oracle export ORACLE_HOME=$ORACLE_BASE/product/crs export ORA_CRS_HOME=$ORACLE_BASE/product/crs export LD_LIBRARY_PATH=$ORACLE_HOME/lib export direction=$ORACLE_HOME/bin:$route umask 022 1e. Configure the oracle consumer shell limits [root@salmon1]# more /etc/safety/limits.conf * smooth nproc 2047 * complicated nproc 16384 * tender nofile 1024 * complicated nofile 65536 [root@salmon1]# grep pam_limits /and so on/pam.d/login session required /lib/security/pam_limits.so 1f. Configure public and private network
using the assistance under, make the necessary changes to community interface instruments eth0 (public) and eth3 (deepest).[root@salmon1]# redhat-config-network
inner most (eth3)
digital1g. Edit the /and so forth/hosts file
Add the entries for digital IP (VIP) addresses in /and many others/hosts. VIP is required in Oracle 10g RAC to raise availability with the aid of disposing of the need to wait on network timeout which may take so long as 10 minutes. refer to http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=not&p_id=264847.1 for more information on VIP configuration.127.0.0.1 localhost.localdomain localhost 10.10.10.84 salmon1-priv.dbsconsult.com salmon1-priv 10.10.10.eighty five salmon2-priv.dbsconsult.com salmon2-priv 192.168.0.184 salmon1.dbsconsult.com salmon1 192.168.0.185 salmon2.dbsconsult.com salmon2 192.168.0.186 salmon1-vip.dbsconsult.com salmon1-vip 192.168.0.187 salmon2-vip.dbsconsult.com salmon2-vip
verify the hostname and the configured community interface contraptions.[root@salmon1]# hostname salmon1.dbsconsult.com [root@salmon1]# /sbin/ifconfig 1h. establish consumer equivalence with SSH
throughout the Oracle Clusterware and RAC installation, the Oracle general Installer (OUI) must be in a position to replica the software as oracle to all RAC nodes without being triggered for a password. This may also be accomplished the use of ssh in its place of rsh.
To set up consumer equivalence, generate the user's public and private keys as the oracle person on both nodes.[oracle@salmon1]$ ssh-keygen -t dsa generating public/deepest dsa key pair. Enter file wherein to store the key (/domestic/oracle/.ssh/id_dsa): Created listing '/home/oracle/.ssh'. Enter passphrase (empty for no passphrase): Enter identical passphrase once again: Your identification has been saved in /home/oracle/.ssh/id_dsa. Your public key has been saved in /domestic/oracle/.ssh/id_dsa.pub. the key fingerprint is: 5d:8c:42:97:eb:forty two:ae:52:fifty two:e9:59:20:2a:d3:6f:fifty nine email@example.com the general public key on each and every node is copied to each nodes. Execute here on each node. [oracle@salmon1]$ ssh salmon1 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys The authenticity of host 'salmon1 (192.168.0.184)' can't be centered. RSA key fingerprint is 00:d9:70:08:bc:fd:b5:e4:e3:df:a3:c7:d8:forty six:1e:a5. Are you sure you wish to proceed connecting (sure/no)? convincedWarning: completely delivered 'salmon1,192.168.0.184' (RSA) to the list of generic hosts. oracle@salmon1's password: [oracle@salmon1]$ ssh salmon2 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys The authenticity of host 'salmon2 (192.168.0.185)' can not be dependent. RSA key fingerprint is 00:d9:70:08:bc:fd:b5:e4:e3:df:a3:c7:d8:46:1e:a5. Are you sure you are looking to proceed connecting (sure/no)? certainWarning: completely delivered 'salmon2,192.168.0.185' (RSA) to the record of frequent hosts. oracle@salmon2's password:
test the connection on every node. investigate that you just aren't precipitated for password for those who run here the 2nd time.
The hangcheck timer kernel module monitors the equipment's fitness and restarts a failing RAC node. It makes use of two parameters, hangcheck_tick (defines the equipment assessments frequency) and hangcheck_margin (defines the maximum hold delay earlier than a RAC node is reset), to assess if a node is failing.
The hangcheck timer may still have already been configured for Oracle 9i (9.2.0.four) RAC. check that the following line is in /and so forth/rc.d/rc.native.[root@salmon1]# grep insmod /and so forth/rc.d/rc.native insmod hangcheck-timer hangcheck_tick=30 hangcheck_margin=one hundred eighty 1j. Create pfile
keep a copy of the pfile for the database improve.SQL> create pfile='/tmp/pfile_singleinst' from spfile;
terrific new features encompass workflow and adventure administration capabilities as well as clustering software and support for the newest edition of J2EE (Java 2 enterprise version).
The strikes are considered as an effort through Oracle to distinguish itself in the increasingly hard-fought database market. The building-in of workflow and event management capabilities heralds a transformation from usual practice. Suppliers continually include these functions on the application server or utility stages but Oracle is pushing to circulate these into the database.
The company is also setting up software to observe the high availability capabilities of its actual software Clusters application to commercial enterprise functions. The expertise became added with the 9i unlock in July.
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Database and Application management has been the primary goal of Database Administrators for many years. With the introduction of Oracle 9i, Oracle has improved many areas of the management infrastructure to make it easier for the DBA to automate the day to day management aspects of the database. In this article we will look at some improvements that are on their wayRecovery Manager Improvements:
RMAN in 9i implements some new features that are designed to reduce the time and effort spent by administrators in performing routine activities related to backup and recovery. RMAN features a new friendly interface and enhanced reporting. To ease backup and recovery operations, RMAN provides for backup configuration, automatic management of backups and archived logs based on user specified recovery window. RMAN also implements a new policy named recovery window which will control when backups expire. These features reduce the time spent by DBA's on day to day backup management activities.Rollback Segment Management:
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Database Administrators had to traditionally shutdown Oracle Instances in order to grow or shring the SGA components. Dynamic Memory Management feature allows the resizing of the buffer cache and shared pool dynamically. 9i also introduces self tuning of working memory for SQL execution by tuning the initialization parameters controlling the allocation of private memory.Resumable Statements:
9i allows Database Administrators to pause or suspend large operations such as a batch update or data load when the DBA finds an Out of Space or other condition. This feature allows the DBA to pause the operation fix the problem and resume the operation from the point of interruption without affecting the normal database operations.Persistent INIT.ora:
9i introduces the persistence of INIT.ora across multiple shutdowns. This allows remote activities like startup without having a local copy of the INIT.ora and also provides immense help in database performance tuning as parameter changes that happened due to Internal Self Tuning and tuning changes made by tools like Oracle Enterprise Manager can persist across shutdowns.
Oracle 9i also introduces various features that ease management like Execution plan history that lets the DBA investigate a bad statement without having to reexecute it. The introduction of Oracle Managed Files lets the DBA handle the space management and removes the extra work of having to manage the files in the database. A default TEMPORARY tablespace has been introduced in 9i reducing the annonying SYSTEM Tablespace usage for temporary space.
This latest release of Oracle's Internet database was made available to users through the company's early access programme at the beginning of this week.
Gary Pugh, director of 9i marketing at Oracle, said the company had focused on four key areas with the new release.
The first is supporting XML. Microsoft has made XML core to its SQL Server database, and Oracle has responded by building XML support direct into the database.
Earlier versions of the Oracle database stored XML as "binary objects" (unstructured data), but Pugh said 9i Release 2 took this support a step further, allowing business to query the XML as structured data.
The second improvement is bundling support for online analytical processing (OLAP) and data marts, a technology previously available on the rival Microsoft SQL Sever and IBM DB/2 platforms.
Pugh said Oracle has also attempted to simplify database management with the new release by providing self-tuning applications. This was one area that industry analysts found the simpler Microsoft SQL Server product particularly strong.
The company's aim was to enhance the management features in the database and automate many of the daily tasks undertaken by a database administrator (DBA).
"We see the traditional DBA role moving from database admin to database analyst where the DBA would add value to the business," said Pugh.
The final core feature of the 9i Release 2 is in backup and recovery. In the past, users ran backup databases. The new features to Oracle 9i Release 2 allow database administrators to split workload between the main database and the backup and so boost performance.
Mike Thompson, an analyst at Butler Group, said this facility would be useful where a DBA needed to cover abnormal transaction loads on the database.
Under these circumstances, said Thompson, it would work out more cost effective to use the backup server to cope with the extra load than extend the live database infrastructure.
However, Thompson warned, "This is not a permanent solution for increasing database performance as it affects the integrity of the backup system."
Oracle is counting on the XML enhancements to 9i being particularly attractive to users. They will allow users to store XML objects within the database. Pugh said, "For example, an insurance company could create claims documents on the fly and analyse the claims directly within the database."
Another application for XML is storing purchase orders in a structured format, so that users can see all of the individual components.
Release 2 is introduced at a time when the database giant is attempting to claw back market share from its nearest rival, IBM.
The latest market share figures from analysts group Gartner show that IBM and Informix took a combined 34.6% share of worldwide new licence revenue from database sales in 2001, beating Oracle's 32%. The market as a whole was worth £6bn.
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