[netcdfgroup] nc_open takes a long time to open a big file

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• Subject: [netcdfgroup] nc_open takes a long time to open a big file
• From: Jennifer Adams <jma@xxxxxxxxxxxxx>
• Date: Thu, 9 Sep 2010 19:33:50 -0400

Dear Experts,

I have a netcdf-4 file that is 18404502496 bytes large.

My file's dimensions look like this:
        lon = 320 ;
        lat = 160 ;
        lev = 11 ;
        time = 1581 ;

It has 7 variables that look like this:
   float temp(time, lev, lat, lon) ;
                temp:_Storage = "chunked" ;
                temp:_ChunkSizes = 1, 1, 160, 320 ;
                temp:_DeflateLevel = 1 ;
                temp:_Shuffle = "true" ;

and 1 variable that looks like this:
    float sfp(time, lat, lon) ;
                sfp:_Storage = "chunked" ;
                sfp:_ChunkSizes = 1, 160, 320 ;
                sfp:_DeflateLevel = 1 ;
                sfp:_Shuffle = "true" ;

--Jennifer


--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma@xxxxxxxxxxxxx

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  • Re: [netcdfgroup] nc_open takes a long time to open a big file
    • From: Denis Nadeau