Orcale Tutorial Content


Getting Started - البدء مع إدارة قواعد البيانات
  • أنواع مستخدمي قواعد البيانات:
  • مهام مسؤول قاعدة البيانات:
  • SQL Statements:
  • Identifying Your Oracle Database Software Release - تحديد إصدار اوركل
  • About Database Administrator Security and Privileges- أمان وامتيازات مسؤول قاعدة البيانات
  • Database Administrator Authentication - مصادقة مسؤول قاعدة البيانات
  • Creating and Maintaining a Database Password File - إنشاء ملف كلمة المرور
    • Oracle Architectural Components - مكونات قاعدة البيانات أوركل
  • ﻤﻜﻭﻨﺎﺕ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • Oracle Instance
  • Oracle Database
    • Installing Oracle Database - تثبيت الأوركل
  • Installing oracle database 10g in windows
    • Creating and Configuring Database - إنشاء قاعدة البيانات
  • ﺍﻟﺘﺨﻁﻴﻁ ﻟﻘﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • ﺇﻨﺸﺎﺀ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﺒﺎﻟﻁﺭﻴﻘﺔ ﺍﻟﻴﺩﻭﻴﺔ علي Windows:
  • ﺇﻨﺸﺎﺀ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﻋﻥ ﻁﺭﻴﻕ ﺍل(DBCA)
  • About Creating an Oracle Database
  • About Selecting a Character Set
  • Prerequisites for Database Creation
  • Creating a Database with the CREATE DATABASE Statement
  • Specifying CREATE DATABASE Statement Clauses
  • Specifying Initialization Parameters
    • Controlling The Database -التحكم في قاعدة البيانات
  • التحكم في قاعدة البيانات - Controlling The Database
  • ﺘﺸﻐﻴل ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • ﺇﻏﻼﻕ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • Opening a Database in Read-Only Mode
  • Opening a Database in Restricted Mode
    • Managing Tablespaces and Data files
  • ﻤﻔﺎﻫﻴﻡ ﻋﺎﻤﺔ ﻋﻥ ﺍل: Tablespaces
  • عملي
    • Control File & Redo Log Files
  • Control File
  • ﺘﻐﻴﻴﺭ ﺍﺴﻡ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • Redo Log Files
    • Administrating Users - إدارة المستخدمين
  • ﺇﻨﺸﺎﺀ ﻭﺇﺩﺍﺭﺓ ﺍﻟﻤﺴﺘﺨﺩﻤﻴﻥ
  • Quota
  • ﻭﺴﻴﻠﺔ ﺍﻟﺘﺤﻘﻴﻕ
  • ﺍﻟﺼﻼﺤﻴﺎﺕ - Privileges
  • ROLES
  • PROFILES
    • Database Security & Monitoring - تأمين ومراقبة قاعدة البيانات
  • Database Security
  • ﻤﺭﺍﻗﺒﺔ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ - AUDITING
    • Oracle Net Services & Database Link & Metrlized Viewِ
  • Oracle Net Services
  • ﺍﻟﺘﺤﻜﻡ ﻓﻲ ﺍﻟﻭﺼﻭل ﻟﻘﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ
  • External Procedures
  • Clients Side
  • Database Link
  • Materialized Views
    • Undo Management & Flashback Technology
  • UNDO MANAGEMENT
  • Flashback Query
  • Flashback Table
  • Flashback Versions Query
  • Flashback Transaction
  • Flashback Drop
  • Flashback Database
    • Managing Shared Servers
  • Why Shared Server
  • Dedicated Server
  • Shared Server Architecture
  • ﻤﺘﻰ ﻨﺴﺘﺨﺩﻡ ﺍل Shared Server ؟
    • Using Globalization Support
  • Globalization
  • ﺍﺨﺘﻴﺎﺭ وتغيير ﺍل Character Set
  • ﻤﺴﺘﻭﻴﺎﺕ ﺍل Globalization
  • ﺍﺴﺘﺨﺩﺍﻡ ﺍل Zones Time
    • Logical Backup & Recovery
  • Use Export Utilities to Export Data
  • TABLES EXPORT Using Export Utilities
  • SCHEMAS EXPORT Using Export Utilities
  • TABLESPACE EXPORT Using Export Utilities
  • DATABASE EXPORT Using Export Utilities
  • Use Import Utilities to Import Data
  • TABLES IMPORT Using Import Utilities
  • SCHEMAS IMPORT Using Import Utilities
  • DATABASE IMPORT Using Import Utilities
  • DATA PUMP
  • TABLES EXPORT Using Data Pump
  • SCHEMAS EXPORT Using Data Pump
  • DATABASE EXPORT Using Data Pump
  • TABLES IMPORT Using Data Pump
  • SCHEMAS IMPORT Using Data Pump
  • DATABASE IMPORT Using Data Pump
  • SQL*Loader
    • Physical Backup & Recovery
  • Physical Backup
  • ﻜﻴﻑ ﻨﻬﻴﺊ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﻟﺘﻌﻤل ﻓﻲ ﺍﻟﻨﻤﻁ ARCHIVELOG؟
  • Cold Backup
  • Full Database Recovery
  • Loss of a Non-SYSTEM Data File
  • Loss of a SYSTEM Data File
  • Loss of an Un-archived Online Log Files
  • Loss of Control Files
  • Loss Unbackup Datafile
  • Damage Tempfile
  • Damage Temporary Tablespace
  • Damage Online Logfile Member
  • Point in Time Recovery
  • Backup and Recovery Options
  • Hot Backup
    • Recovery Manager (RMAN)
  • مقدمة
  • مكونات ال Recovery Manager (RMAN)
  • ﺃﻨﻭﺍﻉ ﺍﻻﺘﺼﺎل ﺒﺎل RMAN
  • ﺨﻴﺎﺭﺍﺕ وأنماط ﺍﻟﻨﺴﺦ ﺍﻹﺤﺘﻴﺎﻁﻰ
  • RMAN Configuration Setting
  • Recovery Catalog
  • RMAN Backups
  • Data Files Backup
  • Tablespaces Backup
  • Archived Redo Log Files Backup
  • Control File Backup
  • Database Backup
  • Incremental Backups
  • RMAN Commands
  • Complete Recovery
  • Incomplete Recovery
  • Restore ControlFile and spfile
    • Managing Resources
  • Consumer Groups
  • Resource Manager Plans
  • Resource Manager Configuration
  • Create Consumer Group
  • Update Consumer Group
  • Delete Consumer Group
  • Privileges & Resource Manager
  • Join To Consumer Group
  • Move Active User To Other Consumer Group
  • Create Resource Manager Plans & Directive
  • Update Resource Manager Plans
  • Update Resource Manager Plan Directives
  • Delete Resource Manager Plan Directives
  • Delete Resource Manager Plans
  • Create Simple Plan
  • Consumer Group Mapping
    • Automating Tasks with the Scheduler
  • The Scheduler Architecture
  • Jobs
  • Programs
  • Schedules
  • Using Programs and Schedules
  • Job Classes
  • Windows
  • (Privileges) ﺍﻟﺼﻼﺤﻴﺎﺕ
  • Job Logs
    • Dealing with Locking
  • Shared & Exclusive Locks
  • Manual Lock Table
  • The Enqueue Mechanism
  • Lock Contention
  • Deadlocks
    • Diagnostic Sources
  • Alert Log
  • Background Trace Files
  • Server-Generated Alerts
  • Editing Thresholds
  • User Trace Files
  • Instance-Level SQL Tracing
  • Session-Level SQL Tracing
    • Dealing With Database Corruption
  • Block Corruption
  • ﺍﻜﺘﺸﺎﻑ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ (Detecting Block Corruptions)
  • The DBVERIFY Utility
  • The ANALYZE Command
  • DBMS_REPAIR Backage
  • ﺍﺴﺘﺭﺠﺎﻉ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ ﺒﻭﺍﺴﻁﺔ ﺍل:RMAN
    • Managing & Monitoring Memory
  • The System Global Area
  • The Shared Pool
  • The Database Buffer Cache
  • The Default, Keep, and Recycle Pools
  • The Nonstandard Block Size Pools
  • Sizing the Database Buffer Cache
  • The Log Buffer
  • The Large Pool
  • The Java Buffer
  • The Steams Buffer
  • Automatic Shared Memory Management
  • Enable Automatic Shared Memory Management
  • The Program Global Area (PGA)
    • Performance Tunning
  • Invalid Objects
  • Unusable Indexes
  • Rebuild Invalid Inexes
  • Optimizer Statistics
  • Gathering Statistics
  • The Automatic Workload Repository (AWR)
  • The Automatic Database Diagnostic Monitor (ADDM)
  • The SQL Tuning Advisor
  • The SQL Access Advisor
  • The Mean Time to Recover Advisor
  • The Segment Advisor
  • The Undo Advisor

    • Dealing With Database Corruption

    Block Corruption

    ﻓﻲ ﺍﻟﺤﻘﻴﻘﺔ ﻟﻴﺱ ﻓﻲ ﻭﺴﻊ ﻤﺩﻴﺭ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﻤﻨﻊ ﺤﺩﻭﺙ ﺍلBlock Corruption ﻭﻟﻜﻥ ﻴﺴﺘﻁﻴﻊ ﺍﻜﺘﺸﺎﻑ ﻫﺫﻩ ﺍﻟﻜﺘل ﻭﺭﺒﻤﺎ ﺍﻟﺘﺨﻔﻴﻑ ﻤﻥ ﺁﺜﺎﺭ ﻫﺫﻩ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ

    ﻋﻠﻲ ﻤﺴﺘﺨﺩﻤﻲ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﺒﺸﺭﻁ ﺃﻥ ﻴﻜﻭﻥ ﻟﻤﺩﻴﺭ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﺇﺴﺘﺭﺍﺘﻴﺠﻴﺔ ﺠﻴﺩﺓ ﻟﻠﻨﺴﺦ ﺍﻹﺤﺘﻴﺎﻁﻲ ﻴﺴﺘﻁﻴﻊ ﻤﻥ ﺨﻼﻟﻬﺎ ﻤﻌﺎﻟﺠﺔ ﻤﺸﻜﻠﺔ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ،

    ﺒﺎﻟﻁﺒﻊ ﺍلBlock Corruption ﻴﻤﻜﻥ ﺃﻥ ﻴﺤﺩﺙ ﻋﻠﻲ ﻤﺴﺘﻭﻱ ﺍلOnline Redo Log File  ﺃﻭ ﺍلArchive Redo Log File   ﺃﻭ ﺍلControl File ﻟﻜﻥ ﻤﺎ ﻴﻤﻬﻨﺎ ﻫﻨﺎ ﻓﻘﻁ ﺍلBlock Corruption

    ﺍﻟﺫﻱ ﻴﺤﺩﺙ ﻋﻠﻲ ﺍلData File ﻭﺫﻟﻙ ﻷﻥ ﻤﺩﻴﺭ ﻗﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﻴﻤﻜﻨﻪ ﺘﻔﺎﺩﻱ ﻤﺸﻜﻠﺔ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ ﻋﻠﻲ ﺍل(Control File & Archive Redo Log File & Online Redo Log File) ﻋﻥ ﻁﺭﻴﻕ

    الMultiplexing.

    ﻋﻤﻭﻤﹰﺎ ﻫﻨﺎﻙ ﻨﻭﻋﺎﻥ ﻤﻥ ﺍلBlock Corruption ﺍﻟﻨﻭﻉ ﺍﻷﻭل Media Corruption ﻭﻫﻲ ﻋﺒﺎﺭﺓ ﻋﻥ ﻤﺸﻜﻠﺔ ﺘﺤﺩﺙ ﻓﻲ Block ﺒﺤﻴﺙ ﺘﺼﺒﺢ ﻤﺤﺘﻭﻴﺎﺕ ﻫﺫﺍ ﺍلBlock ﻏﻴﺭ ﻤﻁﺎﺒﻘﺔ ﻟﺸﻜل (Format)

    ﺍﻻﻭﺭﻜل ﻤﻤﺎ ﻴﻌﻨﻲ ﺃﻨﻪ ﻻ ﻓﺎﺌﺩﺓ ﻤﻥ ﻭﺠﻭﺩ ﻫﺫﺍ ﺍلBlock،

    وﺍﻟﻨﻭﻉ ﺍﻟﺜﺎﻨﻲ ﻫﻭ ﺍلLogical Corruption ﺃﻭ ﻤﺎ ﻴﺴﻤﻲ ﺍلSoftware Corruption ﻭﻓﻲ ﻫﺫﺍ ﺍﻟﻨﻭﻉ ﻴﻜﻭﻥ ﺍلBlock ﻤﻁﺎﺒﻕ ﻟﺸﻜل (Format) ﺍﻷﻭﺭﻜل ﻭﻜﺫﻟﻙ ﺍلHeader Area ﺼﺤﻴﺢ ﻭﺃﻴﻀﺎﹰ

    ﺍلData Area ﻟﻜﻥ ﻤﺤﺘﻭﻴﺎﺕ ﻫﺫﻩ ﺍﻟﻜﺘﻠﺔ ﻏﻴﺭ ﻤﺘﺴﻘﺔ ﺩﺍﺨﻠﻴﺎﹰ. ﻟﻜﻥ ﺤﺘﻰ ﺍلSoftware Corruption ﻓﻲ ﺍﻟﻐﺎﻟﺏ ﻟﻬﺎ ﺍﺭﺘﺒﺎﻁ ﻜﺫﻟﻙ ﺒﺎلHardware ﻭﻟﻜﻥ ﻜﺫﻟﻙ ﻓﻲ ﻅﺭﻭﻑ ﻨﺎﺩﺭﺓ ﻴﻤﻜﻥ ﺃﻥ ﺘﺤﺩﺙ

    ﻤﺸﻜﻠﺔ ﺍﻟﻜﺘل ﺍﻟﻔﺎﺴﺩﺓ ﻋﻥ ﻁﺭﻴﻕ ﺇﻨﺸﺎﺀ ﺍﻷﻭﺭﻜل ﻟﻜﺘل ﻏﻴﺭ ﻤﺘﻨﺎﺴﻘﺔ.

    ﻋﻤﻭﻤﹰﺎ ﻫﻨﺎﻙ ﺃﻜﺜﺭ ﻤﻥ ﻤﺘﻐﻴﺭ ﻓﻲ ﻤﻠﻑ ﺍﻟﻤﺘﻐﻴﺭﺍﺕ ﺒﻘﺎﻋﺩﺓ ﺍﻟﺒﻴﺎﻨﺎﺕ ﻟﻪ ﺍﺭﺘﺒﺎﻁ ﺒﻤﻭﻀﻭﻉ ﺍل Block Corruption ﻓﻤﻥ ﺫﻟﻙ ﺍﻟﻤﺘﻐﻴﺭ DB_BLOCK_CHECKSUM ﺍﻟﺫﻱ ﻴﺄﺨﺫ ﺍﻟﻘﻴﻤﺔ TRUE

    ﻜﻘﻴﻤﺔ ﺍﻓﺘﺭﺍﻀﻴﺔ، ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﻴﺴﺎﻋﺩﻙ ﻋﻠﻲ ﺍﻜﺘﺸﺎﻑ ﺍﻷﻀﺭﺍﺭ ﺍﻟﺘﻲ ﺤﺼﻠﺕ ﺒﺴﺒﺏ ﺍﻟﺘﺨﺯﻴﻥ ﻓﻲ ﺍﻟﺩﻴﺴﻙ، ﻓﻠﺤﻅﺔ ﻋﻤل ﺍلDBWn ﺍﻟﺫﻱ ﻴﻘﻭﻡ ﺒﻜﺘﺎﺒﺔ ﺍلBlock ﻓﻲ ﺍﻟﺩﻴﺴﻙ ﻴﻘﻭﻡ ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ

    ﺒﻌﻤل Check ﻟلBlocks ﻭﺘﻀﻤﻴﻥ ﺫﻟﻙ ﻓﻲ ﺍلHeader،

    ﻭﻋﻨﺩﻤﺎ ﻴﻘﻭﻡ ﺍلServer Process ﺒﻘﺭﺍﺀﺓ ﺫﻟﻙ ﺍلBlock ﻴﻘﻭﻡ ﺍلChecksum ﺒﻌﻤل ﻤﻘﺎﺭﻨﺔ، ﺒﻤﻌﻨﻲ ﺃﻥ ﺃﻱ ﻤﺸﻜﻠﺔ ﺤﺩﺜﺕ ﺒﻴﻥ ﺍلDBWn ﻭﻤﺤﺎﻭﻟﺔ ﻗﺭﺍﺀﺓ ﺘﻠﻙ ﺍﻟﻜﺘﻠﺔ ﺴﻭﻑ ﻴﺘﻡ ﺍﻜﺘﺸﺎﻓﻬﺎ، ﻟﺫﺍ ﺘﻨﺼﺢ

    ﺸﺭﻜﺔ ﺃﻭﺭﻜل ﺃﻥ ﻴﺄﺨﺫ ﺍﻟﻤﺘﻐﻴﺭ DB_BLOCK_CHECKSUM ﺍﻟﻘﻴﻤﺔ ﺍﻻﻓﺘﺭﺍﻀﻴﺔ ﻭﻫﻲ TRUE، ﻟﺫﺍ ﺃﻱ ﻤﺸﻜﻠﺔ ﺘﺤﺩﺙ ﻤﺎﺩﺍﻡ ﺍلBlock ﻓﻲ ﺍﻟﺩﻴﺴﻙ ﺃﻭ ﺃﺜﻨﺎﺀ ﻜﺘﺎﺒﺔ ﺃﻭ ﻗﺭﺍﺀﺓ ﺫﻟﻙ ﺍلBlock ﺴﻭﻑ ﻴﺘﻡ ﺍﻜﺘﺸﺎﻓﻬﺎ.

    ﻟﻜﻥ ﻋﻤﻭﻤﺎﹰ ﺤﺘﻰ ﻟﻭ ﺃﺨﺫ ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﺍﻟﻘﻴﻤﺔ FALSE ﺴﻴﻅل ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﻤﻨﺸﻁﺎﹰ ﺨﻼل ﺍلSystem Tablespace.

    ﻭﻜﺫﻟﻙ ﺍﻟﻤﺘﻐﻴﺭ DB_BLOCK_CHECKING ﺍﻟﺫﻱ ﻴﺄﺨﺫ ﺍﻟﻘﻴﻤﺔ FALSE ﻜﻘﻴﻤﺔ ﺍﻓﺘﺭﺍﻀﻴﺔ، ﻴﺴﺎﻋﺩﻙ ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﻋﻠﻲ ﻜﺸﻑ ﺍﻷﻀﺭﺍﺭ ﺍﻟﺘﻲ ﺤﺩﺜﺕ ﺒﺴﺒﺏ ﻤﺸﻜﻠﺔ ﻓﻲ ﺍﻟﺫﺍﻜﺭﺓ،

    ﺇﺫﺍ ﺘﻡ ﻭﻀﻊ ﺍﻟﻘﻴﻤﺔ TRUE ﻟﻬﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﻓﺈﻥ ﺫﻟﻙ ﺴﻭﻑ ﻴﺅﺜﺭ ﻋﻠﻲ ﺍﻷﺩﺍﺓ ﻟﺫﺍ ﺘﻨﺼﺢ ﺸﺭﻜﺔ ﺃﻭﺭﻜل ﺃﻥ ﻴﺄﺨﺫ ﻫﺫﺍ ﺍﻟﻤﺘﻐﻴﺭ ﺍﻟﻘﻴﻤﺔ ﺍﻻﻓﺘﺭﺍﻀﻴﺔ ﻭﻫﻲ FALSE ﻤﺎ ﻟﻡ ﻴﻜﻥ ﻫﻨﺎﻙ ﻤﺸﺎﻜل ﻤﺤﺩﺩﺓ ﺫﺍﺕ ﺼﻠﺔ

    ﺘﺘﻌﻠﻕ ﺒﺤﺼﻭل ﻤﺸﺎﻜل ﺤﺩﺜﺕ ﻓﻲ ﺍﻟﺫﺍﻜﺭﺓ.

     

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