It looks like tweaking the setting in the cice concatenation script of daily may be advantageous.
There are two things to set in ncrcat:
--cnk_csh Because the default chunk cache size of about 4 MB is too small to manipulate the large chunks ... given there is ~3GB per proc, we could presumable safely set this much bigger than 4MB (300MB+ ?)
--cnk_dmn=time,365 We could try setting this so the time chunks of daily data are the whole month
See https://nco.sourceforge.net/nco.html#Chunking for details
It looks like tweaking the setting in the cice concatenation script of daily may be advantageous.
There are two things to set in ncrcat:
--cnk_cshBecause the default chunk cache size of about 4 MB is too small to manipulate the large chunks ... given there is ~3GB per proc, we could presumable safely set this much bigger than 4MB (300MB+ ?)--cnk_dmn=time,365We could try setting this so the time chunks of daily data are the whole monthSee https://nco.sourceforge.net/nco.html#Chunking for details