search - Accessing limited data from solr -

i have huge amount of data searched. want search solr, , solr returns ids of searched records. have cache of records in solr (memcache) , want fetch whole data set cache.

is idea ? ?

thanks.

and problem is? define 'fl' parameter list of fields want return, in case 'id'.

and if never return other fields, don't bother storing them, define them index only. if have store them want them rarely, test using enablelazyfieldloading setting in solrconfig.xml