While the operation, administration and maintenance (OA&M) of the digitalAGENCY™ System will employ procedures and safeguards designed to avoid situations where a complete loss of processing capability is sustained, it is also recognized that events beyond the reasonable ability of the OA&M organization to predict or avoid can occur precipitating a disaster. The design of the digitalAGENCY™ and its operating procedures must facilitate the execution of a sound disaster recovery plan by:

•  Promoting the collection and preservation of data necessary to support recovery
•  Enabling the configuration of new equipment and reconfiguration of network components to support restoration of service on replacement equipment at a substitute site
•  Supporting the rapid restoration of data and verification of its integrity while minimizing data loss

System Backups

digitalAGENCY™ is an open, scaleable, easily enhanced system which can be used to support its users and which can be extended to incorporate emerging needs in the future. To promote the highest levels of scalability, extensibility and maintainability, the Evero team proposes to emphasize these architectural goals:

Relational database to promote maintainability through data independence. Normalization provides greater maintainability, but to meet performance objectives, a database schema must frequently undergo a degree of de-normalization.

Object orientation to enable incremental development, encourage re-use, promote consistency, compress development time, manage complexity and to simplify implementation of change. In digitalAGENCY™ most of the advantages to be gained from object orientation lie in the user interface components;

Layered architecture to separate data, business logic and presentation components, thus limiting the impact of changes required to incorporate different components into the open architecture;

Standards and Standard Interfaces: Well-defined ways of interacting between different functional layers of an application promote re-usability, ease of modification and adaptation, and portability. They make it possible to "swap out" and replace piece parts, and generally encourage the longevity of the application. Standards include guidelines and APIs defined by an organization for general use in its systems; de facto standards observed by the industry in general through strength of the vendor's market presence; and formal standards promulgated by industry, national and international standards bodies.

Client Applications

Information is one of the most important assets of a company. Therefore, availability of data and protection against data loss is one of the most critical issues for system managers to address. These features are more and more important as data is spread out across a heterogeneous network.

Backup/restore utilities are required to reduce the system manager's task of archiving data. These utilities provide users with more control over archiving and retrieval of their files.

Information is one of the most important assets of a company.

This team will recommend a back-up strategy which employs incremental database back-ups (usually in 15 minute intervals). Secondary backups will be performed on a nightly basis. These backups will be triggered automatically and each day an administrator (trained PC user) will be required to switch the tape. Incremental backups should be performed during the week with a full backup performed once a week. There should be five tapes for the incremental backups, labeled Monday through Friday and one tape for the full weekly backup which could run over the weekend automatically. The tape with the full backup should be stored off-site.

In the event that a file or database server should fail, the proposed system architecture employs both "Clustering / Fail-Over" and Network Load Balancing capabilities. In addition to these capabilities, both hardware redundancy as well as established hardware maintenance agreements will supplement system support.

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