Cache

Read through Cache

 * http://digitalbrikes.com/onebrikeatatime/2008/01/12/a-cache-should-be-read-through/
 * http://wiki.tangosol.com/display/COH32UG/Read-Through,+Write-Through,+Refresh-Ahead+and+Write-Behind+Caching
 * http://publib.boulder.ibm.com/infocenter/wxsinfo/v7r1/index.jsp?topic=/com.ibm.websphere.extremescale.over.doc/cxswritethr.html