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Only a reference, not the data itself, is saved in the database. Physically, ECS data is saved in the directory defined by the property  mz.ecs.path  found in platform.conf. The default path is MZ_HOME/ecs.

If the  mz.ecs.path  parameter is changed, the changes will take effect the next time data is inserted into ECS. Existing ECS data is left at its current location and must not be moved. If required to do so anyway, move the content of the old  mz.ecs.path  directory to the new , one and create a soft link in the old directory pointing out the new location.

Take special precaution precautions when updating the Ultra formats. It is not possible to collect data from ECS if the corresponding UDR has been renamed. If the format definition has changed, you can still collect the data.

Changes to the formats are handled as follows:

• Added or renamed fields will be assigned default values.
• Removed fields will be ignored.
• Fields that have changed data types will be assigned default values.