Category Archives: White papers

Why Disasters Happen

Why Disasters Happen

This research explores the root causes of why disasters happen, and the factors which affect recovery from a disaster. It looks in detail at the problem of loss of Data-in-Flight, and how this affects recovery.

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The Business Impact of Eliminating Loss of Data-in-Flight

The Business Impact of Eliminating Loss of Data-in-Flight

The cost of downtime due to data loss and unplanned outages at Global 2000 companies ranges from 5-8% of revenue. Digital initiatives and the increasing value and importance of data elevates the imperative to address data loss. Organizations should especially focus on vulnerabilities in mission critical systems with a specific emphasis on eliminating the loss of data in-flight. Doing so can cut the cost of downtime in half over a four-year period. This research focuses on how zero loss of data-in-flight leads to certainty of data integrity. This in turn leads to simplified recovery and significantly reduces the chances of disasters.

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Using Axxana’s Phoenix to Converge Continuous Availability and Disaster Recovery in Oracle Applications

Using Axxana’s Phoenix to Converge Continuous Availability and Disaster Recovery in Oracle Applications

Continuous availability and disaster recovery are the two main aspects of business continuity; however, each has different design points as well as different and contradictory requirements. In this short paper we propose a method for using Axxana’s Phoenix to converge continuous availability and disaster recovery solutions into one. Doing so significantly reduces the cost of business continuity by eliminating the need for one complete Oracle installation, including servers, licenses, communication ports, cabling, power, cooling, and so on. That is, instead of three complete Oracle installations, only two are needed.

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Technical Note: Preparing An Image to Upload to Oracle’s Gen 2 Cloud

Technical Note: Preparing An Image to Upload to Oracle’s Gen 2 Cloud

Disaster recovery to the cloud is a very attractive option for organizations that require business continuity in the event of disasters but want to minimize the capital expenditures and operating costs associated with on-premises solutions. Axxana’s Phoenix for Oracle allows organizations to leverage the Oracle Cloud and other cloud environments for disaster recovery, without experiencing the application availability and downtime issues associated with typical hybrid DR solutions. In order to use Axxana’s Phoenix for Oracle in the Oracle Cloud Generation 2 environment, organizations must first upload Axxana’s Recovery Gateway image to the Oracle Cloud Gen 2 environment.

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Disaster Recovery and High Availability in the Hybrid Cloud

Disaster Recovery and High Availability in the Hybrid Cloud

Technical Note: Disaster Recovery and High Availability in the Hybrid Cloud Although many organizations are using a hybrid cloud model for disaster recovery, this model typically cannot deliver high application availability. This drawback is due to the technical constraints of replication in a cloud topology as well as the complexity of writing code for each application to ensure that high-availability solutions address every possible disaster scenario. Axxana engineers recently conducted tests to investigate and develop a solution that simplifies this process and delivers high availability in the hybrid cloud. This technical note provides details of the testing and describes how organizations can use the proposed solution to automate failover and achieve extremely high availability without requiring human intervention or extensive changes to code—and without impacting the application running in the primary site.

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DR in the Cloud – Tech Note August 2018

DR in the Cloud – Tech Note August 2018

Organizations are increasingly moving disaster recovery (DR) to the cloud in order to alleviate the costs and complexity associated with implementing, staffing, and maintaining a standby DR site on their own. The Oracle Cloud allows Oracle Active Data Guard users to create a hybrid DR solution as an alternative to hosting their own standby DR site. In the hybrid model, existing production databases remain on premises, and standby databases used for DR are deployed on the Oracle Cloud. Once the solution is set up, it is transparent to users.

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Disaster Recovery in a Box – Achieving Zero Data Loss in Backup-Only Environments

Disaster Recovery in a Box – Achieving Zero Data Loss in Backup-Only Environments

Organizations that can tolerate application downtime often opt for backup-only disaster recovery because it is less costly and complex than traditional replication solutions. Even so, they may still desire zero-data-loss (ZDL) disaster recovery. Axxana’s DR in a Box™ is the only solution on the market that provides ZDL recovery for Oracle applications when the disaster recovery strategy is based on backups. This whitepaper shows how organizations can use Axxana’s DR in a Box to achieve zero data loss in backup-only disaster recovery environments—without investing in additional sites, storage, or communication lines.

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Technical Note: Understanding Performance in Oracle Active Data Guard Far Sync (Part Two)

Technical Note: Understanding Performance in Oracle Active Data Guard Far Sync (Part Two)

Axxana’s research team recently conducted a series of tests on fine-tuning Oracle Active Data Guard Far Sync for optimal performance within the Phoenix for Oracle Far Sync environment. This Technical Note focuses on how to leverage I/O caching to relieve pressure from the I/O subsystem, and how to smooth the impact of archiving. We show that careful configuration of these parameters can lead to significantly less I/O (eliminating all reads) and a much smoother I/O pattern in multi-instance environments. Findings are also relevant to customers tuning Far Sync in virtualized and non-virtualized environments.

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Technical Note: Understanding Performance in Oracle Active Data Guard Far Sync (Part One)

Technical Note: Understanding Performance in Oracle Active Data Guard Far Sync (Part One)

The quest for optimal performance is never-ending in the world of database administration. Axxana’s research team recently ran a series of tests on fine-tuning Oracle Active Data Guard Far Sync for optimal performance within the Phoenix for Oracle Far Sync environment. This Technical Note highlights the team’s findings related to I/O patterns and caching modes in Oracle Far Sync. It provides valuable insight into the way that different caching modes (cache=none and cache=writethrough) impact memory, CPU, and I/O requirements for the Far Sync environment. Findings are also relevant to customers tuning Far Sync in virtualized and non-virtualized environments.

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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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