Abstract: A resource management node is provided including a processor and a memory. The memory is coupled to the processor and comprises computer readable program code that when executed by the processor causes the processor to perform operations including creating a recovery virtual machine (VM) for a primary machine for each of a primary machines. The recovery VM is stored in a cache file in a kernel of an operating system. The data in the cache file is stored in a format readable by a virtual hypervisor. The processor is further caused to perform operations including providing the recovery VM from the cache file in the kernel of the operating system upon request when the primary machine fails without conversion of the data in the cache file.

Abstract: Various embodiments illustrated and described herein include systems, methods, and computer program products to set up network adaptors in a virtual machine. In some embodiments, a replica virtual machine is started when a replica server takes over for a failed master server. In some embodiments, prior to, or contemporaneously with, a switchover from the master server to the replica server, a virtual storage device of the replica virtual machine is mounted outside the virtual machine environment (e.g., not to the virtual machine). Network adaptor configuration information is copied to the virtual storage device. An injector tool is also configured to run automatically when the replica virtual machine is started. The virtual storage device is the unmounted. When the virtual machine is started as part of the switchover process, the injector tool runs and uses the network adaptor configuration information to configure the network adaptor.

Abstract: A resource management node is provided including a processor and a memory. The memory is coupled to the processor and comprises computer readable program code that when executed by the processor causes the processor to perform operations including creating a recovery virtual machine (VM) for a primary machine for each of a primary machines. The recovery VM is stored in a cache file in a kernel of an operating system. The data in the cache file is stored in a format readable by a virtual hypervisor. The processor is further caused to perform operations including providing the recovery VM from the cache file in the kernel of the operating system upon request when the primary machine fails without conversion of the data in the cache file.

Abstract: A request to generate a snapshot of the master file system for replication is received. The master file system is frozen and a freeze callback function is invoked to generate a consistent point in time. The freeze callback function initiates generation of a bookmark event based on a current time. The bookmark event indicates the consistent point in time for generation of the snapshot. The freeze callback function also initiates capturing I/O events intended for the master file system in order and suspending journal flushing to data storage so as to avoid deadlock of the master file system. The freeze callback function is forwarded and used to generate the snapshot by indicating the consistent point in time to start generation of the snapshot.