Seven
Secrets of Datacentre Design
Clive
Longbottom, service director and analyst at Quocirca opened this session saying
that the secrets were in fact not very secret. "Cloud changes everything -
or does it?" he said. "It's all about latency and its impact on
usage. But we find 1 in 7 large organisations say that cloud has no part in
their future - ever. There's too much confusion."
From the panel, Kevin Buckingham (BT)
said that: "customers are looking for agility, faster routes to market,
and optimal solutions."
Pranay
Misra (Nanotel) said: "Cloud computing is at an early stage in India - but
the issues there are scalability, security and flexibility, and which cloud
model to adopt, a passive or an active network?" He said that the shared
model would click very soon.
Atsushi
Iwata (NEC) said that "you need to think about the applications first,
then the network infrastructure."
Mark
Pearson (HP) asked whether OpenFlow network would operate across the WAN.
"We can speed up automation within and across the datacentres, it will
happen," he said.
Longbottom
said that datacentre designs are changing, with integrated systems from eg Dell
and HP, and asked if this was the future.
Bruce
Bateman (Dell) said: "Today you want to pay as you grow. We can provide
fully containerised solutions, and that model is easier for an IT guy." He
said that organisations can buy more pieces as the business changes, and that
they need to be able to move modules around according to needs, not just scale
up.
Pearson
said that it was up to cloud managers whether OpenFlow (SDN) was the future, given
the strengths of proprietary networks. He noted that "OpenStack is open
with integration points".
Buckingham
said that if you have a customer and provide them with good service, they will
stay with you. He said: "You can spend a lot of time in configuring and
providing services, but customers are much more savvy than they were, so they
need to know that they can switch suppliers if necessary. They want options for
the future."
Longbottom
said that networks need to flatten to reduce latency. Misra said that this is
important, but that it depends on opex costs. He said that it's about security
not just investment and that the multi-tier model will not work in a shared
network.
Bateman
said that traffic is more east-west than before, so this brings the user closer
to the network. "We can speed up the infrastructure in the datacentre but
the service provider gets the latency across countries and continents," he
said, "A 350 millisecond round trip between UK and Asia is not good
enough." This meant that service providers will need to store data within
the country of origin, and use technologies such as deduping and caching.
Longbottom
said that static SLAs are not useful any more and that performance creep is an
issue. How could we improve SLAs automatically to meet new requirements, he
asked. Could we reach a value level
agreement?
Itawa
said: "The open network summit covers this - eg we can provide guaranteed
service. Now we have to provide the right tools to allow networks to
scale."
Bateman
said that Dell could remotely manage not just desktops and laptops but also
servers, and that it had lot of tools for management and automation.
Pearson
said that "datacentre dynamics need a central control plane to abstract
resources. It means can you can incorporate feedback and use that for
templates."
Longbottom
asked: "Abstracting resources has value but doing it all at line speed
creates problems as it's down to hardware. Can we do it all at line
speed?"
Misra
said that it's about how fast you can move in that direction. "In India,
the dynamics are very high and live data transfers from old datacentres will
take time."
Buckingham
said: "BT has invested heavily in the network so we are looking to put
active traffic shaping with agreement with customers."
Longbottom
concluded by saying that the network is now the important thing. "It is
critical to get it right at the datacentre, WAN and LAN levels. It needs a
holistic view."