Database cluster architecture based on dual port solid state disk

A data management method for a database cluster comprising a plurality of nodes, wherein the method comprises:

• writing, by a first node of the plurality of nodes, a transaction log to a first dual port SSD of a plurality of dual port solid state disks (SSDs), wherein each dual port SSD of the plurality of dual port SSDs is connected to a unique pair of nodes and each node in the unique pair of nodes is connected to a unique pair of dual port SSDs;
• acquiring, by a second node, the transaction log from the first dual port SSD when the first node crashes, wherein one port of the first dual port SSD is connected to the first node, and another port of the first dual port SSD is connect to the second node;
• sending, by the second node, the transaction log to a third node connected to a second dual port SSD, wherein one port of the second dual port SSD is connected to the second node, and another port of the second dual port SSD is connect to the third node;
• operating, by the third node, a database process to recover data according to the transaction log, the recovered data is data stored in the first node before the first node crashes.