Arcserve Backup lets you increase and decrease the number of concurrent reads from VM virtual disks when executing backups using VDDK. The capability to increase and decrease the number of concurrent reads helps minimize the overall backup window. You increase and decrease the number of concurrent reads based on the number of VMs that you are backing up as part of the same job or multiple jobs that are running from a backup proxy system. To specify the number of concurrent reads, create or modify (if already present in the Registry) the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\ComputerAssociates\CA ARCServe Backup\ClientAgent\Parameters
VmdkReaderCount
4 (Back up data using VDDK)
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