"MongoDB offered me most of the features I needed with the API I was looking for, but it crashed unrecoverably early in testing..." Just curious...were you run

"MongoDB offered me most of the features I needed with the API I was looking for, but it crashed unrecoverably early in testing..." Just curious...were you running the version that supports the recovery log with the durability option enabled? If so, are you implying that the recovery log feature does not work as advertised? "fling it at the wall and hope that it sticks, with a recovery log tacked on since 1.7." MongoDB's recovery log is "tacked on?" how do you differentiate "tacked on" verses being properly implemented and integrated?