We just completed a redesign of our data center infrastructure which we
expect to be available 24x7x365. I was interested in as much redundancy as
we could afford. While some people consider 1 UPS sufficient, my experience
is that they can also fail and actually prevent failover to generators. We
opted for 2 225KVA UPSs, each of which feed separate PDUs. Critical servers
are powered by circuits from both PDUs, while others may only be on one.
This configuration virtually eliminates a single point of power failure,
unless the generator or our campus co-generation plant fails. At least in
this rare case we would have sufficient power, and time, to shutdown our
systems. We utilize 3 CRAC units, 2 of which can handle the load.
Previous to this upgrade we had an average of less than 1 power failure per
year that affected our data center - all of which were related to component
failures within the single UPS.
While we have a alternative data center site for a few of our services, it
would be financially impossible for us to have full redundancy of servers,
storage, network and of course keep them all updated.
> From: Nadine Stern <[log in to unmask]>
> Reply-To: Nadine Stern <[log in to unmask]>
> Date: Fri, 3 Apr 2009 15:31:10 -0400
> To: "The EDUCAUSE CIO Constituent Group Listserv <[log in to unmask]>"
> <[log in to unmask]>
> Subject: [CIO] DataCenter set up for Business Continuity
> We are dealing with questions about our Data Center - to what extent must we
> be protected for for full "redundancy"... Could you answer the following
> questions by could sending your response to me, the list or to Shawn Sivy,
> ([log in to unmask]) TCNJ's Director of Network and Technical Services who will
> compile the results and send them back to you if you desire.
> Thank you:
> 1. Is your campus datacenter facility expected to be operational 24x7x365?
> 2. If not, how often does your datacenter need to shutdown because of power
> (e.g. power failure) or cooling (e.g. failed A/C or insufficient A/C capacity)
> per year?
> 3. If you have (if you don't, pretend you do), an alternate datacenter, would
> you expect to be able to flick a switch to move all your services to it?
> Example, if someone told you they need to shutdown your primary datacenter
> tomorrow, would you be able to move all your services (email, ERP, web
> servers, etc.) to the alternate datacenter by tomorrow. In addition, once you
> move to the alternate datacenter, could you flick a switch to move the
> services all back to the primary datacenter once it is on-line again?
> Nadine Stern
> Vice President for Information Technology and Enrollment Services
> The College of New Jersey
> [log in to unmask]
> Participation and subscription information for this EDUCAUSE Constituent Group
> discussion list can be found at http://www.educause.edu/groups/.
Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.