persist: use a single persistant connection
persist: use a single persistant connection

Former-commit-id: 1152abbf22d7d8d79e6d8a3863febe7bb10ade2b [formerly aca50b67ed595aedd859c9eeae8f4580cdd0f46e]
Former-commit-id: 03bd015b6fabd28c295b4d9c43d219b04d8d7ad1
torhve/ivar2,haste/ivar2,torhve/ivar2,torhve/ivar2