Recovery

Performing a recovery

!is not a physical media failure but a logical error in the data of the database. The automatic recovery procedure has no way of detecting logical errors.

An automatic recovery always reproduces the last backed up state prior to a physical fault. In order to reproduce an earlier condition, e.g. before the occurrence of a logical error, you can use the command ora_recut (recovery until time).

If the data was distributed over a number of NetWorker servers by the

!backup then it cannot be recreated automatically.An automatic recovery is quite unsuitable if the fault in the database files

Under ORACLE Parallel Server (OPS), the automatic recovery terminates directly after the tablespaces have been restored. The redolog files that are dis- tributed over the various nodes of an OPS system cannot be recreated automat- ically, instead the user must ensure that they can be accessed from a single OPS node and must then recreate them manually. You will find a description of this in the section “Recovery with ORACLE Parallel Server (OPS)”.

5.1.4Manual recovery

In all cases in which an automatic recovery is not appropriate, you should carry out a manual recovery. For manual recovery you will need to know in which directories your redologs and the files or raw devices of your tablespaces are located.

5.2Performing a recovery

The following sections describe how you can perform a recovery of an ORACLE database. The first section describes automatic recovery of an optional database level using ora_recut, the second section describes an fully-automatic recovery of the last saved level of the database, the third section describes a manual recovery and the fourth one a recovery with OPS.

System Administrator’s Guide

U42252-J-Z915-1-76

Page 47
Image 47
3Com NSR-ORA V3.2 manual Performing a recovery, Manual recovery

NSR-ORA V3.2 specifications

The 3Com NSR-ORA V3.2 is a versatile networking solution designed to enhance connectivity and streamline data management across various enterprise environments. With the rapid evolution of digital communication, 3Com recognized the need for a robust system that caters to the demanding requirements of today's businesses. The NSR-ORA V3.2 is specifically engineered to provide optimal performance, scalability, and reliability.

One of the standout features of the NSR-ORA V3.2 is its integrated network processing capabilities. This device employs advanced multi-layer switching technology that significantly boosts data throughput while maintaining low latency. This is particularly advantageous for organizations that rely on real-time data transmission for critical applications, such as VoIP and video conferencing. The ability to process large volumes of data efficiently ensures that businesses can operate seamlessly without disruptions.

Another key characteristic of the NSR-ORA V3.2 is its support for a wide range of networking protocols. The device is compatible with both IPv4 and IPv6, allowing businesses to transition smoothly to newer network architectures without the need for significant reconfiguration. This dual-stack capability not only enhances network flexibility but also future-proofs investments as organizations look to scale and adapt their digital infrastructure.

Security is at the forefront of the NSR-ORA V3.2's design. The device incorporates advanced security features such as firewall protection, intrusion detection, and secure VPN capabilities. These components work together to safeguard sensitive information and ensure that data integrity is maintained across the network. In addition to these features, the device offers comprehensive management tools, allowing network administrators to monitor performance and manage access controls more effectively.

The NSR-ORA V3.2 also excels in its interoperability with various devices and platforms, making it an ideal choice for enterprises that utilize a mix of legacy systems and modern technologies. Its compatibility with both wired and wireless networks provides businesses with the flexibility to design an infrastructure that meets their specific operational needs.

In summary, the 3Com NSR-ORA V3.2 is a powerful networking solution that combines advanced processing capabilities, robust security features, and a high degree of compatibility with diverse systems. Its emphasis on performance and scalability makes it a compelling choice for organizations seeking to enhance their network infrastructure in an ever-evolving digital landscape.