dhis2-users team mailing list archive

[Lars Helge Øverland <larshelge@xxxxxxxxx>]

Hi Tom,

I understand your concern and I think we could put more emphasis on
this in the documentation. The decision for not storing zeros as the
default option was made with a view to performance and usefulness.
Typically in a large country implementation, 70% of the records end up
being zeros, which will impact performance and storage size
correspondingly. Also, when you aggregate up one level in the
hierarchy or in the time dimension, the significance of zeros
disappear. On the other hand, zeros have some usefulness in seeing
where data has actually been entered. When considering this trade-off
we decided that not storing them would be the most viable default
option. As you know, this is fully configurable.

regards, Lars


On Thu, Oct 4, 2012 at 7:21 AM,  <hiattt@xxxxxxxxxxxx> wrote:
> Thanks, Andrew. I understand the option; my only suggestion is to change the
> default behavior as a more conservative approach. But I guess it depends on
> the majority of use cases.
>
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>
> Tom
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