There is normally a confused look, when I suggest there is
no need for a SAN!
We first of all have to understand that VMware View is built
on the VMware ESX infrastructure, where the Storage Area Network (SAN) is a
requirement for server virtualisation.
For VMware View, the backbone of the solution is shared
storage, where SANs are often used to provide this. The underlying VMware ESX
infrastructure has to be configured to use logical unit number (LUN) addresses
in order to give high availability. This
means they reserve a LUN on a SAN for 2 servers, so if one server goes down the
other still points to the same disk. Using direct attached storage cannot work
with this approach as Direct Attached Storage (DAS) by definition cannot be
shared.
Neocoretech provides a different approach based on clusters,
utilising direct attached storage. A dedicated Ethernet interface links two
servers to that disk cluster and the disks are mirrored over the LAN. This also
improves performance as there are more disks and therefore more spindles are
available to deliver disk IOs.
In combination with utilising read-only desktops on the
Neocoretech NDV solution, means that the VDI infrastructure is only delivering
the desktop, which means dedicated network storage can (and should) be used to
manage the data and storage.
With correct sizing and infrastructure, Neocoretech NDV will
not only lower the TCO giving quicker ROI, but it also means there is no need
to endure the SAN IOPS storm in the morning!
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