Function Scope

Introduction

these redolog files had already been saved on the backup medium by the archiving monitor and then automatically deleted, they will be read in again and reapplied until the database is up to date. The database is then opened and is again ready for normal operation. The recovery is triggered by the ora_recut and nsrora_rec commands and proceeds automatically; a knowledge of ORACLE is not necessarily required for this (see also chapter “Recovery”).

2.5Function Scope

Physical faults that bring normal database operation to a halt basically fall into the following four categories:

●loss of a (all) control file(s)

●loss of a current online redolog file

●loss of files containing system data

●loss of files containing user data.

As a rule, the loss of a control file does not pose major problems because the control file can be mirrored at the software level using the control_files parameter in the ORACLE parameter file init<ORACLE_SID>.ora. ORACLE strongly recommends saving at least two copies of the control file on different disks. We agree with this recommendation.

The loss of a current online redolog file is also precluded almost completely by mirroring (at the software level by ORACLE or at the hardware level by mirror disks).

For this reason, neither of these fault categories (loss of the control file ! and loss of current online redolog files) is taken into account during an

automatic recovery of the database. Only in recovery until time with

ora_recut is the relevant control file also recovered. Nor is NSR-ORA in a position to recognize or correct logical database errors (for instance, if incorrect files are loaded into the database).

The ORACLE Administrator Guide explains what you can do if you should lose the control file and/or a number of redolog files. You can also refer to the chapter “Recovery” of this manual, which describes the restrictions that apply to automatic recovery for ORACLE Parallel Server (OPS) systems.

In the other two cases (loss of files containing system or user data), NSR-ORA offers various ways of recovering the data: fully automatic or manual recovery or restore of a specific database level (recovery until time).

System Administrator’s Guide

U42252-J-Z915-1-76

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.