41
requires one management the metadata controller has it up as necessary for the
device to sit between all the granted storage authorisation, storage requirements.
TECHNOL
applications or host electronic the data can use the entirety
devices and the server area of the fibre optic SAN While being the simplest
network (SAN). Host devices bandwidth without method due to the fact that
only have to query the interference from its control. no sub-system alterations
OGY
virtualisation appliance to have to be implemented, it is
find where on the virtual drive The LSI StoreAge SVM not practical for larger
the data is stored. solution is a good example. It organisations with substantial
results in better utilisation of storage requirements and
VIR
The appliance then redirects the SAN bandwidth, as well as even larger data centres, due
the host device to the excellent scalability and to the operating costs
TU
relevant storage unit. storage consolidation, and associated with single storage ALISA
However, the disadvantage the ability to pool products server management.
with this method is the from different vendors in one
TION
associated bottleneck of unified virtual partition. The answer to the eternal
requests that can build up (if question of storage capacity
the throughput of the device This solves the ‘bottlenecking’ inevitably lies in the
is limited), increasing network issue, however does require consolidation of resources
latency as a by-product. It each host device to utilise a and therefore the
therefore becomes necessary new set of drivers that allow virtualisation of available
to make sure your them to recognise the storage facilities. Big is not
virtualisation appliances are metadata controller and necessarily best.
at least as fast as your fastest establish the separate control
storage device. path. By deploying storage
virtualisation architecture, an
Out-of-band Host-based organisation can avoid the
The second architecture type Host-based storage capital expenditure that
essentially works in the same virtualisation is the final results from constantly
way as in-band, with a device option to consider. Each host purchasing extra hardware
manager sitting between the electronic device or when there are already vast
SAN and the applications. application has its own virtual amounts of unused storage
However this separates the ‘storage focused’ interface potential available, as well as
data and metadata into that allocates both the core delaying the need to
different strands, both of data and its control. physically expand the data
which are saved in different centre size in order to
locations. However this incorporate unnecessary
requires the equipment.
The applications installation and
then ‘seek management Ongoing costs are also
permission’ of specialist minimised by simply powering
from the software on fewer storage servers,
metadata every relevant therefore minimising carbon
controller which server, often at footprint and saving on
advises exactly the operating man-hours by introducing a
where its system level. This degree of automation to a
accompanying technique utilises process, that is already
data is saved. The age old volume designed to maximise its own
advantage of an managers to potential.
out-of-band present the storage
system is once pool and then divide www.zycko.com
WWW.SNS-UK.CO.UK OCT 09
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