Pfile vs Spfile « Orlando Olguín Olvera. En este post, quiero mostrar la diferencia entre tener una base de datos con Pfile contra una que tiene Spfile. Para iniciar, definamos lo que es cada uno de los términos. Ambos se refieren a un archivo, este archivo, es el que define el comportamiento de la base de datos por medio de parámetros de la misma. Pfile El nombre viene de Parameter File y es un archivo de texto y vive en el sistema de archivos, específicamente en el: ORACLE_HOME\database (windows) ORACLE_HOME/dbs (linux o unix) Este archivo cuyo formato es initSID.ora, es leído cuando se levanta la instancia de la base de datos y con base en él, se conforma el comportamiento de la misma. Los parámetros de la base de datos pueden ser modificados en dicho archivo y serán tomados en cuenta la siguiente vez que se levante la base de datos. Spfile El nombre proviene de Server Parameter File, y es un archivo binario asociado a la base de datos. ¿Cómo interactuar entre ambos tipos?
Create spfile from pfile; Ejemplo: Pfile Spfile Me gusta: Oracle Concepts. This is a brief introduction to Oracle Concepts for the DBA. Conceptually, you can think of an Oracle database as nothing more than a large electronic filing cabinet, a place to store and retrieve information. At the computer level, Oracle is a computer program that manages an electronic filing cabinet. Oracle Platform Concepts One reason that Oracle has become the world dominant database is because it runs on just about every platform imaginable, from a mainframe to a Macintosh. Today, most shops run Oracle in UNIX, Linux, and Windows. Oracle runs on almost every computer ever made, with over 60 diverse platforms such as Intel (like your PC does), Sun Solaris, old IBM mainframes, and many, many others. Conceptually, Oracle is considered the world? Oracle flexibility concepts Oracle has become the world? Unlike simpler databases, you can control every aspect of Oracle? Oracle Concepts for Automation However, Oracle can be simple too!
Oracle Database Administration Concepts. Tema-1-conceptos-basicos-de-oracle.pdf (application/pdf Objeto) Understanding the OracleAS Portal Architecture. 1.3.1 Understanding OracleAS Web Cache OracleAS Web Cache is a powerful server acceleration and load balancing solution. Using OracleAS Web Cache is required for running OracleAS Portal. OracleAS Web Cache offers intelligent caching, page assembly, and compression features. OracleAS Web Cache accelerates the delivery of both static and dynamic Web content, and provides load balancing and failover features for Oracle Application Server.
To increase the availability and scalability of medium to large deployments, consider configuring multiple instances of OracleAS Web Cache to run as members of a cache cluster. By distributing the Web site's content across multiple OracleAS Web Cache servers, more content can be cached and more client connections can be supported, expanding the capacity of your Web site. OracleAS Portal functions as a Web Cache origin server to take advantage of the following Web Cache features: Portal sites can choose from the following deployment options:
"veritas cluster server" emulator windows. Oracle v$ Views. Oracle SQLPlus < Eddie Awad’s Blog. Even though I use Sql Navigator at work, I also often use SQLPlus. Almost everyone who has access to an Oracle database, has access to SQL*Plus. On the other hand, not everyone has SQL Navigator or similar third party tools installed on his/her machine. SQLPlus can be started in GUI mode (Windows only) or in command-line mode. I like the command-line mode because it is more flexible and can be used on any platform. By default, when you start SQLPlus, the prompt changes to SQL>: C:\>sqlplus scott/tiger SQL> You can easily change the prompt if you like, just use set sqlprompt to whatever you like: SQL> set sqlprompt 'command >' command > But you want to set the sql prompt to be something like “current user @ database name”, so you may do something like this: Cool. Much simpler. You may already know that if you create a file named login.sql and put it in the same folder where you launch SQLPlus, that file, login.sql, will always execute once at the time you execute the command “sqlplus”.
OOPS! Crear tablespace y tabla. Oracle Concepts - Starting your Oracle Database. One of the most common jobs of the database administrator is to startup or shutdown the Oracle database. Typically we hope that database shutdowns will be infrequent for a number of reasons: * Inconvenience to the user community. * Anytime you cycle the database, there is a risk that it will not restart. * Starting your Oracle database flushes the Oracle memory areas, such as the database buffer cache. Performance on a restarted database will generally be slow until the database memory areas are ? Warmed? Up. Why would you shutdown your database? * Applying a patch or an upgrade. * Allow for certain types of application maintenance. * Performing a cold (offline) backup of your database.
. * An existing bug in your Oracle software requires you to restart the database on a regular basis. When the time comes to ? The Oracle Startup Command You start the Oracle database with the startup command. . * Startup (nomount) * Mount * Open Let? The Startup (nomount) Stage Starting the Oracle Instance (Nomount Stage) Uso de RMAN para Respaldos. Recuerdo a mi primer Jefe cuando empecé a desempeñar mi trabajo como DBA, lo que más me recalcó fue mi responsabilidad no sólo de poder realizar backups, sino de poder restaurar la información de mis backups.
Esta responsabilidad es la que me gusta transmitir a todos los DBAs con los cuáles he interactuado. De nada sirve tener un backup si no vas a poder recuperar la información. A menudo me preguntan sobre las formas de respaldos de bases de datos oracle, y siempre respondo que lo mejor es el uso de RMAN. ¿Qué tan complejo puede ser RMAN? , la realidad es que ya configurado es muy sencillo, o en su forma más simple, sacar un respaldo es cuestión de un comando en 2 palabras: C:\Documents and Settings\Hugo\Escritorio>rman target / Recovery Manager : Release 10.2.0.3.0 - Production on Mié Jul 23 13:21:30 2008 Copyright (c) 1982, 2005, Oracle.
Conectado a la base de datos destino: ORCL (DBID=524232147) RMAN> backup database; ¿Y el restore? RMAN> shutdown abort; RMAN> startup mount; Tabla modificada. Cómo recuperar un fichero dañado ó eliminado de un tablespace de Oracle con RMAN. Cómo activar/desactivar el modo de archive log de una base de datos Oracle. Connect. SCN, the System Change Number.
Backup and Recovery. Data Recovery Advisor is an integrated solution that performs much of the diagnosis and repair work for you. Data Recovery Advisor can diagnose failures, suggest both manual and automated repair options, and in some cases automatically repair failures. To correct problems caused by logical data corruptions or user errors, you can use Oracle Flashback as an alternative to media recovery. Oracle Flashback features enable you to rewind the whole database or a subset of the database to a previous time. To correct media failures, you can use media recovery. Data Recovery Advisor Oracle Database includes the Data Recovery Advisor tool, which automatically diagnoses persistent data failures, presents appropriate repair options, and executes them at your request.
A checker is a diagnostic operation or procedure registered with the Health Monitor to assess the health of the database or its components. Failures are normally detected reactively. Oracle Flashback Technology Oracle Flashback Database. Oracle® Database Express Edition. Getting Started Guide 10g Release 2 (10.2) February 2006 Welcome to Oracle Database Express Edition (Oracle Database XE)! This tutorial gets you quickly up and running using Oracle Database XE by creating a simple application. This guide covers the following topics: 1 Logging in as the Database Administrator The first thing you need to do is to log in as the Oracle Database XE Administrator.
Open the Database Home Page login window:On Windows, from the Start menu, select Programs (or All Programs), then Oracle Database 10g Express Edition, and then Go To Database Home Page.On Linux, click the Application menu (on Gnome) or the K menu (on KDE), then point to Oracle Database 10g Express Edition, and then Go To Database Home Page.At the Database Home Page login window, enter the following information:Username: Enter system for the user name.Password: Enter the password that was specified when Oracle Database XE was installed.Click Login.The Oracle Database XE home page appears.
U.S. Locally vs. Dictionary Managed Tablespaces. When Oracle allocates space to a segment (like a table or index), a group of contiguous free blocks, called an extent, is added to the segment. Metadata regarding extent allocation and unallocated extents are either stored in the data dictionary, or in the tablespace itself. Tablespaces that record extent allocation in the dictionary, are called dictionary managed tablespaces, and tablespaces that record extent allocation in the tablespace header, are called locally managed tablespaces.
SQL> select tablespace_name, extent_management, allocation_type from dba_tablespaces; TABLESPACE_NAME EXTENT_MAN ALLOCATIO ------------------------------ ---------- --------- SYSTEM DICTIONARY USER SYS_UNDOTS LOCAL SYSTEM TEMP LOCAL UNIFORM Dictionary Managed Tablespaces (DMT): Oracle use the data dictionary (tables in the SYS schema) to track allocated and free extents for tablespaces that is in "dictionary managed" mode. Free space is recorded in the SYS.FET$ table, and used space in the SYS.UET$ table. Bases de datos en castellano. Estructuras de Oracle bases de datos mysql oracle sqlite access mssql. Tablas En este capítulo se van a tratar dos temas fundamentales en toda base de datos Oracle: los usuarios o esquemas y las tablas. Se explicará todo muy por encima ya que el objetivo de este manual no es mostrar cómo consultar o crear datos en una base de datos Oracle, sino conocer los elementos que soportan una base de datos Oracle y que será lo que se explica con profundidad en los siguientes temas.
Además, se parte de la idea de que se conoce SQL y la herramienta SQLPLUS, desde la cual se ejecutan todas las sentencias que se explican en el manual para la creación de usuarios, tablas, tablespaces, datafiles, etc. La función básica de una base de datos es la de almacenar información. Esta información se almacena en unas unidades lógicas llamadas tablas. La forma en que se almacenan los datos en las tablas está estructurada de manera que resulte muy sencillo su acceso y en cada tabla guardaremos los datos que tienen relación o que definen una idea del mundo real.
Drop table empleados; Database Online Documentation 10g Release 2 (10.2) Certifications - All. Certification Program: Exam Listing.