NSR-ORA and NetApp

Recovery

If you want NSR-ORA to copy the files (selection “1”) it will search for the directory with the most free space and will ask you whether the existing archivelog files should be copied to this filesystem. Additionally you may also specify a different directory. Later on, if there are redolog files required for the database recovery, NSR-ORA searches this directory for these redolog files before it tries to perform a backup from the NetWorker tape media.

However if overwriting of the archivelog files is selected (as shown in the example above, selection “2”), the dialog shown above appears.

If you do not select the snap restore function, (because for example another database is located on the same volume, NSR-ORA checks the relevant direc- tories, if it is possible to copy the files using the ndmp_copy command or not. If there are any files not related to the database to be restored to one of the relevant directories, NSR-ORA asks, if you really want ndmp_copy to be used. This is because this command also restores these other files. If the answer is “no”, NSR-ORA performs the default copy command.

6.6.2Crash Recovery (nsrora_rec)

When a database file is corrupted NSR-ORA first tries to recover it using the last (most recent) snapshot (see “Example 1: Recovery based on the last snapshot”). However the recovery can also be based on a snapshot dating from an earlier point in time (see “Example 2: Recovery based on a specified snapshot”).

Performing a recover based on a snapshot NSR-ORA restores the files on the database computer using the standard copy command or, if possible, it restores them on the NetApp filer using the ndmp_copy command. In the second case the corrupted files must be the only ones stored in the relevant directory, because the ndmp_copy command copies complete directories only but not single files.

Example 1: Recovery based on the last snapshot

Should I try to use a copy from the LAST SNAPSHOT or do you want to select a specific snapshot?

1)last SNAPSHOT

2)select SNAPSHOT

(default 1:) > 1

INFO: doing ndmpcopy for /netapp_oracle/sapdata4/proti_1

System Administrator’s Guide

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3Com NSR-ORA V3.2 manual Crash Recovery nsrorarec, Example 1 Recovery based on the last snapshot

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.