Friday, January 30, 2009
(This correction provided courtesy of the hawk-eyed Charlie Garrod. Thanks, Charlie!)
Monday, January 26, 2009
According to a Sun press release, they've completed the largest datacenter consolidation project in the company's history -- which they expect to save $1M in electricity costs, and 11,000 metric tons of CO2 per year. More details in the linked article, but the datacenter uses flywheel-based UPSes, a high-end Liebert XD cooling system that can dynamically allocate the amount of cooling based on demand. (Note the little air hoods over each rack.)
The major focus seems to be on space and cooling efficiency, estimating a PUE of about 1.38. (For every 1 W of computing power, 1.38 W of power enters the datacenter.) For interesting comparison, Google claims a PUE of 1.21 across six datacenters, with one running at 1.13. It's quite likely that some of those datacenters use evaporative cooling in friendly environments, etc.
Saturday, January 24, 2009
Thursday, January 22, 2009
Tuesday, January 20, 2009
The second annual study found that data center managers are caught between two conflicting goals – more demanding user expectations and higher levels of performance, yet reducing costs remain the primary objective for the data center. The report also found that data center staffing remains problematic, servers and storage continue to be underutilized and disaster recovery plans are out of date. Finally, the respondents indicated that while they are pursuing green data center initiatives, they are doing so primarily based on cost benefits.And notes that they're attempting to do so using familiar-sounding tools:
The major server-related initiatives include server consolidation (80 percent) and server virtualization (77 percent).
Or see the full PDF version of the 2008 State of the Data Center report (pdf)
The second article talks about the C1E (extended HLT) state, (Page 6) which is like normal C1 but also turns voltage down to the lowest level. This type of sleep state may address some of the issues of using idle states in the first two papers we read this semester.
“Our vision is, how do we virtualize the entire data center?” Ms. Warrior said. “It is not about a single product. We will have a series of products that enable us to make that transition.”