Data storage method and apparatus, device, medium and storage cluster

A data storage method, being applied to a memory database configured for a storage cluster comprising a master node and at least one slave node, an internal volume is created by the master node based on a plurality of storage class memory disks configured for the storage cluster, and the internal volume is configured as a persistent storage region of the memory database;

• wherein the master node and the at least one slave node are configured to:
• access, in a readable and writable manner, the internal volume or storage partition corresponding to the master node and the at least one slave node;
• and
• access, in a read-only manner, the internal volumes or storage partitions corresponding to other nodes;
• the method comprising:
• in response to receiving a write instruction through an interface provided by database software installed on the master node and the at least one slave node in the storage cluster, directly writing target data to be written corresponding to the write instruction into a database table corresponding to the master node and the at least one slave node in the internal volume in the persistent storage region of the memory database for storage;
• in response to receiving a target query request, accessing, through the interface provided by the database software installed on the master node and in the read-only manner, the internal volume to acquire performance monitoring data of all nodes in the storage cluster;
• and
• determining and returning a query result for the target query request according to the performance monitoring data of all the nodes;
• wherein one of:
• the internal volume is created by:
• assembling a disk redundant array on a basis of the plurality of storage class memory disks configured for the storage cluster;
• and
• creating the internal volume corresponding to each of the master node and the at least one slave node in the storage cluster on a basis of the disk redundant array, wherein one internal volume is configured to store the target data of one of the master node and the at least one slave node, wherein the internal volumes corresponding to other nodes in the storage cluster are accessed in the read-only manner;
• or
• the internal volume is created by:
• creating a single internal volume on the basis of the disk redundant array;
• and
• dividing the single internal volume into storage partitions corresponding to the master node and the at least one slave node, wherein one storage partition is configured to store the target data of one of the master node and the at least one slave node, wherein the storage partitions corresponding to other nodes in the storage cluster are accessed in the read-only manner.

A storage cluster, comprising a master node and at least one slave node, an internal volume is created by the master node based on a plurality of storage class memory disks configured for the storage cluster, and the internal volume is configured as a persistent storage region of a memory database;

• wherein:
• the master node is configured to create the internal volume of the storage cluster in the persistent storage region of the memory database on a basis of the plurality of storage class memory disks configured for the storage cluster;
• and
• the master node and the at least one slave node are configured to:
• access, in a readable and writable manner, the internal volume or storage partition corresponding to the master node and the at least one slave node;
• and
• access, in a read-only manner, the internal volumes or storage partitions corresponding to other nodes;
• the master node or a new master node after the master node and the at least one slave node are configured to:
• receive a target query request, accessing, through an interface provided by a database software installed on the master node and in the read-only manner, the internal volume to acquire performance monitoring data of all nodes in the storage cluster;
• and
• determine and returning a query result for the target query request according to the performance monitoring data of all the nodes;
• wherein one of:
• the master node is configured to:
• assemble a disk redundant array on the basis of the plurality of storage class memory disks configured for the storage cluster;
• and
• create the internal volume corresponding to each of the master node and the at least one slave node in the storage cluster on a basis of the disk redundant array, wherein one internal volume is configured to store the target data of one of the master node and the at least one slave node, wherein the internal volumes corresponding to other nodes in the storage cluster are accessed in the read-only manner;
• or
• the master node is configured to:
• create a single internal volume on the basis of the disk redundant array;
• and
• divide the single internal volume into storage partitions corresponding to respective each of the master node and the at least one slave node in the storage cluster, wherein one storage partition is configured to store the target data of one of the master node and the at least one slave node, wherein the storage partitions corresponding to other nodes in the storage cluster are accessed in the read-only manner.