Monthly Archives: November 2017

Setting Up an Observer

The observer is an automatic Data Guard broker. It can be installed with either the Oracle Client Administrator software or the full Oracle Database software. It is preferable that the observer would run on a different host than the primary and standby databases, using the same network as any end-user client or application. The host should be located in a third, independent location—or at least isolated as much as possible from the standby database. Make the observer highly available by configuring auto restart on the same server or on an alternate host.

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Squeezing the Max out of 12c Disaster Recovery Webinar

Squeezing the Max out of 12c Disaster Recovery Webinar

The Axxana R&D team has spent a lot of time experimenting with Oracle Active Data Guard Far Sync to achieve optimal performance and minimize resource usage. This webinar gives a high-level explanation of what Far Sync is, how it works, and why you want to use it. It then reviews highlights of Axxana’s experimentation, including how specific configuration parameters influence system behavior from a memory, CPU, and I/O perspective, as well as specific cache configurations that DBAs can use to improve I/O performance and minimize latency. The webinar also shows how Axxana’s Phoenix optimizes Oracle Far Sync to provide a true zero-data-loss solution with optimal performance—with only two remote data centers instead of three.

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Less Is More

Less Is More

Why Two Data Centers Is Better Disaster Recovery Than Three Old-school thinking is that disaster recovery solutions require a three-data-center topology in order to guarantee zero data loss and fast recovery. In this topology, the primary (production) data center usually replicates data synchronously to a nearby site and the nearby site then replicates that same data asynchronously to a distant site. Although a three-data-center topology is the supposed ideal, it cannot guarantee zero data loss in regional and rolling disasters. In addition, it forces organizations to compromise on a number of other fronts. What You DON’T Get with Three Data Centers: Zero Data Loss A three-site architecture never guarantees RPO = 0, especially in the case of earthquakes, hurricanes, regional electrical blackouts, communication line cuts, or other disasters that damage the nearby (synchronous replication) site and its communication link with the other sites.

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2DC with Axxana is better than 3DC

2DC with Axxana is better than 3DC

Traditional business continuity and disaster recovery solutions often revolve around synchronous replication in a three-data-center topology; however, these solutions come at a high price in terms of dollars and risk. The bottom line is that three-data-center solutions cannot guarantee zero data loss. In fact, they pose a number of risks and challenges. Read this whitepaper to find out why and to learn how Axxana’s Phoenix for Oracle revolutionizes disaster recovery by making two-data-center solutions more secure, more efficient, and more cost-effective than traditional three-data-center solutions.

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