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Category: Compression

Power Pivot Compression

There might be a theme to today’s posts…

Matt Allington shows us compression in Power Pivot:

Power Pivot would end up storing a table that looks more like the black table above (rather than the blue one), keeping just the minimum amount of information it needs to rebuild the real table of data on the fly when and if required.   If the black RLE table ended up taking more space than the original column of data, then there would be no benefit of RLE and the original column of data would be stored.  Power Pivot may use one or more of the other compression techniques used as well as, or instead of RLE – it all depends on the specifics of the actual data.

This is a very interesting look at ways the Power Pivot team optimize data storage.

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Calculating Partition Sizes

Rolf Tesmer has a nice series on partitioning going. His latest entry involves calculating partition sizes in advance:

Sometimes (just sometimes) you need to calculate the size your table partitions upfrontbefore you actually go to the pain and effort of partitioning (or repartition) a table.  Doing this helps with pre-sizing the database files in advance instead of having them auto-grow many many times over in small increments as you cut data over into the partitions.

Check out the entire series.

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