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Geodatabase Versioning, Replication, and Archiving

Outline. What is versioning and why is it important for GIS data management?What is archiving and why is it important for GIS data management?How does versioning relate to archiving?What is replication and why is it important for GIS data management?. 1. What is versioning and why is it important for GIS data management?.

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Geodatabase Versioning, Replication, and Archiving

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    1. Geodatabase Versioning, Replication, and Archiving May 25, 2010 material assembled from the web pages at http://resources.arcgis.com/content/geodatabase-and-arcsde

    2. Outline What is versioning and why is it important for GIS data management? What is archiving and why is it important for GIS data management? How does versioning relate to archiving? What is replication and why is it important for GIS data management?

    3. 1. What is versioning and why is it important for GIS data management? Versioning allows multiple users to edit the same data in an ArcSDE geodatabase without applying locks or duplicating data. Users always access an ArcSDE geodatabase through a version. Click on Understanding versioning http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/A_quick_tour_of_versioning/00270000000r000000/

    4. 2. What is archiving and why is it important for GIS data management?

    5. 3. How does versioning relate to archiving? Versioning is performed when multiple users edit a dataset; that is, support for multiple transactions on the data. Archiving is performed by storing the current transactional version that becomes the historical versions of the transactional data. Questions?

    6. 4. What is replication and why is it important for GIS data management?

    7. Conclusions Versioning is important to preserve transaction processing. GIS transactions are commonly very long and large in comparison to business transactions. An archive is created by storing a transactional version as a historical version; used for storing the “past” of the world, e.g. parcels are split and they are merged by land use activities from one time period to another. Replication is used to improve access to data, hence performance. Replication places the data close to users in an enterprise environment, BUT maintains the data management integrity

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