Methods for facilitating high availability in virtualized cloud environments and devices thereof

A host computing device comprising a processor and a memory coupled to the processor which is configured to be capable of executing programmed instructions comprising and stored in the memory to:

• store by a first virtual storage controller a plurality of received transactions in a transaction log in an in-memory storage device;
• monitor the first virtual storage controller;
• determine when a failure of the first virtual storage controller has occurred based on the monitoring and when the failure of the first virtual storage controller is determined to have occurred:
• remap at least one storage volume previously assigned to the first virtual storage controller to be assigned to a second virtual storage controller;
• retrieve, by the second virtual storage controller, at least one of the transactions from the transaction log in the in-memory storage device;
• and
• replay, by the second virtual storage controller, the at least one of the transactions.

A non-transitory computer readable medium having stored thereon instructions for facilitating high availability in a storage network comprising executable code which when executed by a processor, causes the processor to perform steps comprising:

• storing, by a first virtual storage controller, a plurality of received transactions in a transaction log in an in-memory storage device;
• monitoring the first virtual storage controller;
• and
• determining when a failure of the first virtual storage controller has occurred based on the monitoring and when the failure of the first virtual storage controller is determined to have occurred:
• remapping at least one storage volume previously assigned to the first virtual storage controller to be assigned to a second virtual storage controller;
• retrieving, by the second virtual storage controller, at least one of the transactions from the transaction log in the in-memory storage device;
• and
• replaying, by the second virtual storage controller, the at least one of the transactions.