In parallel (check the corresponding Veeam proxy settings, default To allow VMware to HotAdd the VM disks at backup.Īdd an extra SCSI controller to allow for more VM disks processing Proxy Server VM that is used somewhere at the VMs in your infrastructure You will need at least one type of (virtual) SCSI controller added to Note: For additional tips refer to the “Impact of Snapshot NFS backup mode for backup and restore of NFS datastore based VMs. To avoid this completely we highly recommend you to use the Direct ) enable a specific setting that will process VM backups only onīackup proxies that run on the same host. To avoid some VMware issues related to NFS datastore and hot-add.Bypassing VDDK helps overcoming this limitation This significantly impacts performance for other workloads on the datastore, and slows down restore throughput. When performing writes via hot-add and VDDK, excessive metadata updates on the VMFS datastore will occur.Typical "hot-add I/O bursts" during hot-add operations are mitigated byīypassing VMware VDDK during restores and replication.Veeam can back up multiple disks of VM in parallel on same proxy.This feature automatically initiates disk consolidationįor VMs in the "Virtual machine disks consolidation is needed" state.įor more information please see Snapshot Hunterīypassing Virtual Disk Development Kit (VDDK) processing to overcome some limitations and To mitigate the issue, Veeam implemented the following functionality: Leading to downtimes (such situation is most likely to happen on NFS based "orphaned snapshots" will grow over time and can fill up the datastore It may occur that VMware API reports that unmap and snapshot commit wereĭone correctly but a snapshot file still remains on disk. In the "Veeam Backup & Replication Server" section of this guide. Note: For more information see vCenter Server connection overview
Is mapped and unmapped (disk hot-add) at the backup proxies. In situations with a high number of VMware clusters with individualĭatastores a minimum of one proxy per cluster is needed, this canĪdditional load is put on the vCenter Server and ESXi hosts as each disk This mode requires additional planning and configuration in theĮnterprise environments because of the additional large disk Hot-Add Ultimately require additional physical ESXi hosts and licensing. Infrastructure resources impacting consolidation ratio. If working in this mode the backup proxy will occupy the virtual Using the Virtual Appliance mode for proxy servers enables a fullyĪs the proxy will perform source side data deduplication andĬompression, this mode will provide satisfactory performance inĮnvironments running 1 GbE configurations. Direct Storage Access should be usedįor all virtual and physical proxy deployment to backup and restore The problems with disk hot-add and release which causes Veeam developed Direct Storage Access for NFS based datastores to overcome Tip: It is recommended to benchmark how such operations affect theīackup window by monitoring a test job in the vSphere console. Virtual machine simultaneously (using this transport mode). To mitigate the issueĮnable parallel processing and process multiple disks from the same Removing disks with no actual data processing. Virtual machines this could result in more than two hours of adding and When planning for the Virtual Appliance mode for a backup proxyĬonsider the time required for actual hot-add operations (such as addingĪnd removing VM disks from the source virtual machine) it can add up Then using VMware Hot-Add will likely provide the optimal throughput. Virtual Appliance mode should be used when it is not possible to leverageĭirect Storage modes, for example in the case of local datastores, In such scenarios using Virtual Appliance mode for data transport will significantly reduce administrative overhead due to leveraging VMware Hot-Add.
One example of where Virtual Appliance mode can be recommended for proxies is in highly dynamic environment where it can be difficult to maintain access to newly created datastores for Direct Storage Access. “ Data Retrieval and Restore in Virtual Appliance Note: For more information on how it works, refer to the section Proxy server and later unmapped after backup/restore. VMware snapshot are mapped by VMware Disk Hot-Add to a virtual backup For example, in the case of a backup, the disk files from a This mode supports a 100% virtual deployment using direct storageĪccess through VMware ESXi storage I/O stack having very little It is often used when Veeam is deployed in
Widespread as it is the default setting with Veeam Backup & ReplicationĪll-in-one deployment in a virtual machine (for details, see the Veeam’s Virtual Appliance (Hot-add) mode has become quite