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StorTrends iTX Installation CDT – a True Event Addressable Storage
Today there are various implementations of CDP. A vast majority of vendors implement
it on the Host that is serving as the File or Application Server. In Host based CDP, there
is a filter driver or "Data-Tap" residing in the Host Operating Systems that replicates
every I/O on the Production Server to the CDP Server. This chews up Host bandwidth
and also makes the offering OS specific. In fabric based CDP products, the intervening
intelligent switches like MDS 9000 SANtap from Cisco take on this responsibility to
replicate I/Os. Though this imparts OS agnostic-ness to the solution, handling transport
failures become very messy. On the other hand, StorTrends offer complete target side
CDT both at the production and/or recovery sites obliterating the need for any host side
agents.
Figure 2 above depicts an iTX box configured to serve Production Server I/Os and at the
same time offering EAS. Here two production volumes V0 and V1 are continuously
protected by the EAS journal. In the event of disaster or for other data processing needs, a
frozen image to any specific point can be recalled, reviewed and rolled back.
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StorTrends® 1300 User's Guide (StorTrends iTX version 2.7)
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