The Raritan Blog

Data Center Outages Decrease, But Downtime Costs Rise

Posted on November 18, 2022 by Gento

Data center operators are suffering fewer data center outages, but the financial impact is increasing when they do happen. 

In 2021, 69% of data center operators reported that they experienced an outage during the past three years, down from 78% in 2020, according to a recent Uptime Institute survey of 786 global IT and data center managers. 


Sensor-Mounting Best Practices: Meeting Growing Demands

Posted on April 27, 2021 by Gento

This blog from Raritan answers the question, where best to mount environmental monitoring sensors in the rack?  From airflow to temperature, we address the highs and lows of sensor placement. 


Riding Out the Pandemic: The Importance of SmartSensors for Remote Management

Posted on March 8, 2021 by Gento

The COVID-19 pandemic has demonstrated the data center industry’s reliance on remote management.  In this blog, we discuss the role of Raritan SmartSensors while looking back a year.


Will Governments Force the Data Center Industry to Become More Energy Efficient with Green Data Center Laws?

Posted on March 2, 2021 by Website Administrator

For the past year, the European Union (EU) has threatened to enact green data center laws including a goal of requiring data centers in Europe to be climate neutral by 2030. But in hopes of preempting government regulations, a group of European data center operators have signed a pact to self-regulate themselves.


Data Center Cabinet Load Balancing:  there’s a less complicated way.

Posted on March 28, 2017 by Gento

Rack PDUs in a Server Rack

Why do we load balance?

Without going into the complicated math, suffice it to say that load balancing in a 3 phase system is desirable.  The more unbalanced a system the more problems it creates.  UPS life, for one, can be affected by unbalanced systems.  Although one circuit (server cabinet) being out of balance won’t have much effect, if many or all circuits on a panel are out of balance, the main circuit supplying the breaker panel will be out of balance and this can ruin your upstream UPS.  There are also efficiency issues with unbalanced loads.

How is load balancing currently accomplished in a rack cabinet?

To balance a load in a cabinet, the loads of the equipment power supplies are spread across the 3 phases – L1/L2, L2/L3, L3/L1.  This is done by plugging the first server (or switch/router) in an outlet wired on L1/L2, the next server on L2/L3, the next on L3/L1, then start over.  The goal is to get an equal number of devices/loads on all 3 phases – or as close as possible. 

This approach can quickly turn into a cabling nightmare. Most rack PDUs are linear in their phase layout of outlets – there are only three banks of outlets, one for each phase.  For example, on a 36 outlet PDU, outlets 1 through 12 will be on L1/L2, 13 through 24 on L2/L3, and 25 through 36 on L3/L1.  If you use the above method of balancing, and start racking the devices at the bottom U position, the third device you plug in will need to reach the top third of the PDU and the last device may have to reach back to the bottom of the PDU.  In other words, a lot of crisscrossed cabling.

How do Raritan’s balance the cable and load balancing challenge?

In certain Raritan PX three-phase models the architecture gets around the cabling issue by staggering the grouping of outlets - there are at least 6 banks of outlets.  For example, outlets 1 through 6 are on L1/L2, 7 through 12 on L2/L3, 13 through 18 on L3/L1, but then we start over at L1/L2 for outlets 19 through 24. (See Illustration below)

This intelligently engineered architecture results in more reliability and easier execution.  The devices towards the top of the cabinet don’t need to be plugged in to the bottom of the PDU and devices at the bottom don’t need to be plugged in to the top.


Page 1 of 2 pages  1 2 > 

Subscribe

Upcoming Events

New Zealand Cloud & Datacenter Convention 2022
3 November 2022, 9am – 4pm  •  Grand Millennium Hotel, Auckland, New Zealand
Data Centre World Singapore
12th – 13th Oct 2022
Korea Cloud & Datacenter Convention 2022
6th Oct 2022
Philippines Cloud & Datacenter Convention 2022
4th Aug 2022
JANOG50 Meeting Hokkaido
3th – 15th July 2022

View all Events

Latest News

Exclusive interview丨How does Huizhou upgrade its manufacturing industry?
Posted on December 2, 2021
Raritan Reveals The MasterConsole® Digital Dual KVM Switch
Posted on February 18, 2021
Legrand Data, Power and Control Division Announced as Finalist in Six Categories at DCS Awards 2020
Posted on November 9, 2020
Raritan’s New Smart Rack Controller (SRC) Intelligently Manages Environmental and Security Information in Data Centers and Mission-Critical Facilities
Posted on November 9, 2020
Legrand India Launches Datacenter Infrastructure Solution for the addressable market size of INR 3000 crores
Posted on August 23, 2020

View all news