Asynchronous data journaling model in hybrid cloud

A cloud system for block device mirroring in a hybrid cloud, the system comprising:

• a first virtual machine;
• a first journaling device in the first virtual machine, wherein the first virtual machine writes first block data to the first journaling device, wherein the first block data includes a journal record about a change in a database;
• a first hypervisor to covert the first block data to a message, wherein converting the first block data includes encrypting the first block data;
• a cloud queueing service to publish the message asynchronously through a network of a host operating system in a public cloud, wherein the first virtual machine, the first hypervisor, and the cloud queueing service are in the public cloud, wherein the message includes the encrypted first block data;
• a subscriber to receive the message published by the cloud queueing service asynchronously;
• a second hypervisor to convert the message to second block data;
• a second virtual machine;
• and
• a second journaling device in the second virtual machine, wherein the second hypervisor sends the second block data to the second journaling device, wherein the subscriber, the second hypervisor, and the second virtual machine are in a private cloud.

A non-transitory computer readable medium for block device mirroring in a hybrid cloud, the non-transitory computer readable medium including instructions that, when executed, causes one or more processors to:

• write, by a first virtual machine, first block data to a first journaling device of the first virtual machine, wherein the first block data includes a journal record about a change in a database;
• convert, by a first hypervisor, the first block data to a message, wherein converting the first block data includes encrypting the first block data;
• publish, by cloud queueing service, the message asynchronously through a network of a host operating system in a public cloud, wherein the first virtual machine, the first hypervisor, and the cloud queueing service are in the public cloud, wherein the message includes the encrypted first block data;
• receive, by a subscriber in a private cloud, the message published by the cloud queueing service asynchronously;
• convert, by a second hypervisor in the private cloud, the message to second block data;
• and
• send, by the second hypervisor, the second block data to a second journaling device in a second virtual machine, wherein the second virtual machine is in the private cloud.