Among the many solutions for managing data, one of the most widely used is Oracle Database (DB Oracle), as it provides reliable data management support and is adaptable to multiple additional systems, such as security systems. In this regard, ITD Consulting has also developed backup and recovery solutions for this system.
The importance of data and keeping it secure from cyberattacks has increased over time with technological advancements. Similarly, although many systems integrate backup solutions, as is the case with data managers, it is always important to consider managing them through a specialized system that is not subject to the potential failures of the primary system. Managed backup and recovery packages, such as those offered by ITD Consulting, address this need.
General Characteristics of DB Oracle
DB Oracle, or Oracle Database, is an object-relational database management system developed by the American software and hardware company, Oracle Corporation. This system is characterized by allowing the management and security of the data sets it hosts through the creation of structured schemas accessible only to authorized administrators.
Like other extensive data management systems, such as SQL Server or SAP, DB Oracle allows its users to automate processes and generate data analyses in less time, optimizing the resources available. Like the mentioned database management systems, the operational and security responsibilities of these systems are high, as much of the company's operations depend on their management and security. Thus, it is essential to ensure that databases are managed using adequately handled backup and recovery solutions, like the ones offered by ITD Consulting.
DB Oracle functions as the core of a company’s IT environment. This is because it uses a relational database model, which allows the company and customer data to be stored and represented as organized data sets. These sets are structured into columns, tables, and rows, with the data points connected using attributes.
DB Oracle enables greater data structuring, organizing, and presenting large volumes of data intuitively and efficiently. It stands out in the market for its ability to adapt to both on-premise and cloud systems.
This level of complexity and adaptability also requires that external security backups are tailored to the system’s specifications. Therefore, it is important to consult your backup and recovery service provider to ensure that it meets the specific needs of DB Oracle backup. Furthermore, the complementary security system for backup and recovery must be decided based on whether it will be hosted on-premise or in the cloud, according to security needs and possibilities in either system.
Like many data management systems, DB Oracle uses the standardized SQL language to create database structures, manage records, perform actions, and retrieve data. Since SQL is a specialized programming language that can be built over time, it is advisable that the backup and recovery system can recover the key commands used in data management to ensure that the backup is as comprehensive as possible. In this sense, it is recommended to hire a managed backup and recovery service tailored to the company's needs and operational practicality. ITD Consulting currently offers this type of solution and can guide you through its implementation.
DB Oracle’s architecture consists of a database to store database files, database instances for managing the necessary data, and the required number of processes that connect database clients to database instances. In this last aspect, we can identify both logical and physical data structures, each with corresponding storage structures.
- Physical Storage Structures
Data files, control files (containing database metadata), and redo logs (which document changes).
- Logical Storage Structures
Tables and data blocks, extents (for grouping logical data blocks), segments (extents phases), and tablespaces (logical containers for segments).
Backup in DB Oracle
As a general reminder, a backup is a copy of the information necessary to rebuild the database when needed, which is why backup and recovery are considered a single system. There are four main types of failures in DB Oracle. First, physical failures are caused by hardware malfunctions, such as disk failures. Second, design failures are holes in the software, either in the OS or the DBMS. Third, operational failures are caused by human intervention, due to DBA errors, inappropriate configurations, or poor planning of backup procedures. Finally, environmental failures are related to natural disasters, power outages, excessive heat, and more.
In the face of these potential disasters, backup and recovery systems are responsible for restoring the system and preventing downtime for the affected company.
DB Oracle offers physical and logical backups within its own system. A physical backup involves copying files, including OS backups, cold backups, and hot backups. Logical backups, on the other hand, only extract table data using SQL commands and are performed with the export/import utility.
It is advisable to use both types to ensure the most comprehensive backup. Additionally, managed backup and recovery packages, such as those provided by ITD Consulting, enable these mixed backups to be handled appropriately, minimizing the risk of errors. It’s important to remember that the backup and recovery process is crucial to the resilience of a company’s data and operations.
Recovery in DB Oracle
As part of the backup and recovery option, DB Oracle provides recovery options in the event of a failure, which may include user errors, statement failures, process failures, network failures, instance failures, and system failures. In response to these, there are three types of recovery:
- Block Recovery
This is the basic recovery mechanism, which happens automatically. It occurs when a process "dies" while modifying a block. The system uses online redo log records to rebuild the block and write it to disk.
- Thread Recovery
This is also performed automatically when the Oracle system detects that an instance has "died" and left a thread open. It restores the modified data blocks that were in the dead instance's cache and closes the open thread.
- Physical Recovery
This recovery is triggered by the Recover command. It is used to convert backup files into current files or to restore changes lost when a data file was taken offline without a checkpoint, by applying both archived and online redo log files.
While DB Oracle's recovery options are useful, greater security can be achieved with a managed backup and recovery system, like the one offered by ITD Consulting. This is because both self-managed and managed backup and recovery solutions can offer broader options for restoring and securing the system. If you're interested in more information on backup and recovery for DB Oracle to keep your company protected, contact us at [email protected].
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