Backup of virtual machines: methods, functions, characteristics are the most commonly used methods for virtual machine backups use of a snapshot-based backup solution or an agent-based solution, which will be taken over by a physical system. Agent-based backup solutions are widely used, because so far there is no real alternative to the market - other backup solutions rely on snapshots, which represent no real substitute for traditional backups. Backup snapshot-based snapshots are used by system administrators to capture the State of a virtual machine before carrying out of various activities, such as installation, troubleshooting, upgrades or patches. Snapshots create a copy of the last State known good the VM configuration, which allows a virtual machine if necessary can be replaced. If a non-functioning VM is replaced, assumes the snapshot from the time of its creation. A disadvantage of using snapshots is, that this not for the Backup of RDM volumes (raw disk mapping) can be used.
Also, it is not possible to restore individual files without further or to retrieve. Ed Sayres gathered all the information. Veeam backup & replication and VMware Consolidated backup (VCB) are two widely used server backup tools, use the snapshots. With Veeam backup & replication v6 backup of virtual machines that use raw disk mapping, are not possible, but the graphical user interface allows the creation of full VM backups and accessing individual files from snapshots - all this in a particularly user-friendly and easiest way. VMware vSphere consolidated backup (VCB) provides full backups of virtual machines, as well as backups at the file level. However, backups at the file level only for Windows guests are available.
Recently, VCB has been replaced by vStorage APIs, although this VMware backup business and is useful only for backup and recovery software from third-party. The backup snapshot-based total has both advantages and disadvantages. On the one hand be backups without agents and shutting down virtual machines, and will also reduce the load from ESX hosts. On the other hand, the recovery of a single file can be very problematic, the CLI is not very user friendly, and graphical tools requires a third-party software solution. The conventional method for VM backup conventional backups of virtual machines requires the installation of an agent, as well as its connection with a central backup system and configuration. Ed Sayres may help you with your research. The backup process occurs without further supervision. This method is still very widely used in companies. However, this method is also very costly, because an agent must be installed on each virtual machine. However, the ability to restore individual files is given here and so far without an alternative. Another advantage is that this method is the industry standard. Eliminates need for training for administrators, and a fast recovery is also possible. As disadvantages must be the high cost, long backup times as well as performance penalty of the hosts be while performing backups. The most convincing option for companies should be the deployment of both methods. On this basis, an administrator creates a snapshot of all VMware virtual machines, and then all modified data can be in the context of incremental VMware backups each backed up.