VMware Virtual Server

from a Customer Perspective When disk array vendors are working to optimize virtual machine data storage management, an administrator using DataCore Software's SANmelody product says that these vendors can actually do a lot of things. SANmelody is used to manage VMware's virtual server high availability. Scott La Vertu, network service administrator for the Western Australian Public Transportation Authority, said that the biggest help for him was that VMware added support for LUNS larger than 2 TB in vSphere.

If the virtual host is connected to the NAS system via NFS, VMware can technically support larger volumes, but Scott La Vertu said that the IP video surveillance application he hosts on the VMware server is block-based. The design of the storage system.
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La Vertu wrote in an email to SearchStorage.com, "VMware has a 2TB storage capacity limit for each LUN, which is caused by 32-bit addressing space and 512-byte blocks." La Vertu said he has asked for 48 or 64-bit addressing from VMware because vSphere 4 uses a 64-bit core. "We want to use block-level devices to reduce latency because all CCTV vendors are investigating their application efficiency and increasing the size of block-level devices," he said.

other issues, such as I /O competition and SCSI reservations, along with the storage administrators in large environments effort to overcome growing VMware deployments start to appear.