Hello,

I am trying to get a better grasp on how layer groups work.  

I am attempting to load about 200GB of Raster data,  70% CIB and 30% CADRG,
RPFTOCs.  So right now I have created Layer groups of each area, For
instance, I have Layer Group AZ_CIB, VA_CIB, CA_CIB, AZ_CADRG, VA_CADRG, and
CA_CADRG.  I then put all those groups into 2 layer groups, CIB and CADRG, 
Both of those groups I have a base layer of Blue Marble data with a shape
file as outline,  that way when zoomed all the way out user can see where
they are.

Within AZ_CIB, I have layers AZ_CIB10, AZ_CIB05, AZ_CIB01  (the same for VA
and CA)
Within AZ_CADRG I have AZ_CADRGGNC, AZ_CADRGJNC, AZ_CADRGJOG, AZ_CADRGFCDAY,
AZ_CADRGONC, AZ_CADRGTLM100, AZ_CADRGTLM50, and AZ_CADRGTPC (same for VA and
CA)

My CADRG groups I have setup SLDs that have min and maxscaledenominator set
to switch to a different layer depending on zoom level. 

On CIB groups I have them Layered CIB10 to draw first then CIB05, lastly
CIB01.  These maps show different resolutions, 10 meter, 5 meter and 1
meter.   So lets say I am trying to look at or cache the the AZ area, is
Geoserver trying to render and build tiles for CIB10, CIB05 and CIB01 if I
am looking at an area that has CIB01 (since thats my top layer)?  Or does it
see there is data in that area for CIB01, so it doesnt work 3 times as hard
and only look at the CIB01 data?

I guess problem comes in when i try to seed these layers,  sometimes it will
work, but sometimes it will crash. It wont ever say anything other than
"estimating".  I then have to restart the service.

Is there a better way to do this?

Also, when I have layer groups of layer groups.  Can I seed the AZ Layer
group and GWC will look at the AZ Layer group to get its cached tiles, or
will it build its own tiles under CIB?  I see under gwc folder it makes a
CIB folder, so im assuming its a completely different cache,  just trying to
see if there is a best way to get the cache built.  



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