TiKV Spanner transaction interface SDK

RO/RW Transaction lifetime

Begin()

• do nothing, gen txn struct with RO/RW

Get()

• get TS if not exist
• start heartbeat with transaction nodes
• call tikv get RO/RW with TS

Set()/Delete()

• store key value in local storage(map)

Commit()

• map & gather all keys with regions
• choose coordinator leader
• call commit on every perticipators and leader