削减云计算的碳成本
文章来源:未知 文章作者:enread 发布时间:2014-09-16 06:31 字体: [ ]  进入论坛
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Cloud computing1 involves displacing data storage and processing from the user's computer on to remote servers. It can provide users with more storage space and computing power that they can then access from anywhere in the world rather than having to connect to a single desktop3 or other computer with its finite resources. However, some observers have raised concerns about the increased energy demands of sustaining distributed servers and having them up and running continuously, where an individual user's laptop might be shut down when it is not in use or the resources utilization4 of the server is less than the lower threshold , for instance. Now, writing in the International Journal of Information Technology, Communications and Convergence, researchers at the University of Oran in Algeria, have investigated how cloud computing systems might be optimized5 for energy use and to reduce their carbon footprint. Jouhra Dad and Ghalem Belalem in the Department of Computer Science at Oran explain how they have developed an algorithm to control the virtual machines running on computers in a cloud environment so that energy use of the core central processing units (CPUs) and memory capacity (RAM7 as opposed to hard disk storage space) can be reduced as far as possible with affecting performance overall.
 
"Energy consumption is considered as a major problem in computing systems containing servers, data centers and clouds," the team says. "These resources continue to consume a large amount of energy and produce carbon dioxide emissions8." The team's study reveals that virtualization of processes and live migration9 of VMs within the cloud service using their algorithm of selection and allocation allows different tools and applications to be consolidated10 to use less CPU and memory capacity. This in turn reduces energy demands on the servers by allowing several virtual machines to be run on a single remote compute2 accessible to the users without compromising performance.
 
To optimize6 the energy consumption of data centers, the proposed approach is divided into two phases. The first one is the selection of VMs using the modified minimization of migration algorithm which takes in consideration the CPU utilization and RAM capacity. The solution is based on upper and lower physical resources thresholds. The second phase is the allocation of the migrated VMs which uses the modified multidimensional knapsack problem. This algorithm must pack in as many items as possible into a bag without exceeding a weight limit and without being forced to leave behind essential items when travelling.


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1 computing tvBzxs     
n.计算
参考例句:
  • to work in computing 从事信息处理
  • Back in the dark ages of computing, in about 1980, they started a software company. 早在计算机尚未普及的时代(约1980年),他们就创办了软件公司。
2 compute 7XMyQ     
v./n.计算,估计
参考例句:
  • I compute my losses at 500 dollars.我估计我的损失有五百元。
  • The losses caused by the floods were beyond compute.洪水造成的损失难以估量。
3 desktop sucznX     
n.桌面管理系统程序;台式
参考例句:
  • My computer is a desktop computer of excellent quality.我的计算机是品质卓越的台式计算机。
  • Do you know which one is better,a laptop or a desktop?你知道哪一种更好,笔记本还是台式机?
4 utilization Of0zMC     
n.利用,效用
参考例句:
  • Computer has found an increasingly wide utilization in all fields.电子计算机已越来越广泛地在各个领域得到应用。
  • Modern forms of agricultural utilization,have completely refuted this assumption.现代农业利用形式,完全驳倒了这种想象。
5 optimized 81c61ac8ff2adb570ce4c7e7dfed59bd     
adj.最佳化的,(使)最优化的v.使最优化,使尽可能有效( optimize的过去式和过去分词 )
参考例句:
  • We are often asked whether consumer Web sites should be optimized for beginners or intermediates. 我们常常被问到这样的问题:消费类网站究竟应该为新手而优化,还是应该为中间用户而优化? 来自About Face 3交互设计精髓
  • GOOGLE Advertising optimized sequence, greatly increasing the advertising effect. 优化了GOOGLE广告位排列顺序,大大增加了广告效果。 来自互联网
6 optimize WIoxY     
v.使优化 [=optimise]
参考例句:
  • We should optimize the composition of the Standing Committees.优化人大常委会组成人员的结构。
  • We should optimize our import mix and focus on bringing in advanced technology and key equipment.优化进口结构,着重引进先进技术和关键设备。
7 ram dTVxg     
(random access memory)随机存取存储器
参考例句:
  • 512k RAM is recommended and 640k RAM is preferred.推荐配置为512K内存,640K内存则更佳。
8 emissions 1a87f8769eb755734e056efecb5e2da9     
排放物( emission的名词复数 ); 散发物(尤指气体)
参考例句:
  • Most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。
  • Dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。
9 migration mDpxj     
n.迁移,移居,(鸟类等的)迁徙
参考例句:
  • Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
  • He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。
10 consolidated dv3zqt     
a.联合的
参考例句:
  • With this new movie he has consolidated his position as the country's leading director. 他新执导的影片巩固了他作为全国最佳导演的地位。
  • Those two banks have consolidated and formed a single large bank. 那两家银行已合并成一家大银行。
TAG标签: energy cloud carbon
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