[Users] ds_select_dst("1","0"): hash on callid

Hi, I'm having some interesting results with using the ds_select_dst function to load balance asterisk boxes. I.e. packets with method==INVITE are routed with ds_select_dst. when using two destinations in the dispatcher.txt file, the calls get disproportionately sent to one destination, unless i'm using the callid hash. However callid's property of changing with every invite (reinvite, etc) causes me to question it's suitableness. For example: A calls B, puts B on hold, takes B off hold. Error prone or not? A calls B, puts B on hold, calls C, conferences. Ad nauseum. Am I missing something? Is there a better approach? Should it Just Work, even hashing on callid? Mark Price