https://www.tiot.jp/riak-docs/riak/kv/2.9.10/configuring/next-gen-replication/ ,
On startup, if tictacaae is enabled, then the vnode will detect of the vnode backend has the capability to be a "native" store. If not, then parallel mode will be entered, and a parallel AAE keystore will be started. There are two potential parallel store backends - leveled_ko, and leveled_so.
https://www.tiot.jp/riak-docs/riak/kv/2.9.10/configuring/next-gen-replication/ ,
On startup, if tictacaae is enabled, then the vnode will detect of the vnode backend has the capability to be a "native" store. If not, then parallel mode will be entered, and a parallel AAE keystore will be started. There are two potential parallel store backends - leveled_ko, and leveled_so.Also in the AAE page and references file.