saving energy in data center networks

... the data center itself Our experiments show that, on average, savings of 25-40% of the network energy in data centers is feasible Extrapolating to all data centers in the U.S., we estimate the savings ... different scaling factors, as well as for different intra data center versus outside data center (external) traffic ratios, we observe energy savings ranging from 25-62% We present our energy savings results ... greedy + % original network power 65 60 55 traffic leaves the data center and the remaining 30% is distributed to servers within the data center In order to compute the energy savings from ElasticTree...

Ngày tải lên: 23/03/2014, 13:20

... reducing network power consumption, which consumes 10-20% of the total power – billion kWh in 2006 Data Center Networks • There’s potential for power savings in data center networks due to two main ... Introduction • Most efforts to reduce energy consumption in Data Centers is focused on servers and cooling, which account for about 70% of a data center s total power budget ... expensive ones • With an increase in the number of switches and links, there are more opportunities for shutting down network elements Typical Data Center Network Fat-Tree Topology Energy Proportionality...

Ngày tải lên: 05/07/2014, 05:20

... Scale-­‐up Data Center:  2N  Tree   !"#$% &''#$'()"*% -(./% +,'$% 10   Scale-­‐out Data Center:  Fat  Tree   &"'($ )**'(*+,"-$ #*($ !"#$%$ !"#$/$ !"#$0$ !"#$1$ from  Scalable  Commodity Data Center, ...  link  rate?   Our   Addi%ons   link  off    no  flow   Flow  on  ac%ve  links  only   packets in  =  packets  out?   bandwidth  >=  demand?   Connect  switches  and  links   switch  off  links ... Switch  power  state   Boolean   Link  power  state   Op%miza%on  Goal                    minimize  Σ  (  link  +  switch  power)   Constraints   Type   Constraint   Descrip6on   Mul%-­‐   Capacity...

Ngày tải lên: 05/07/2014, 05:20

... Deploying IPv6 in Campus Networks 107 Chapter Deploying Virtualized IPv6 Networks 185 Chapter Deploying IPv6 in WAN/Branch Networks Chapter Deploying IPv6 in the Data Center Chapter 10 Deploying ... Deploying IPv6 in the Data Center 261 Designing and Implementing a Dual-Stack Data Center Data Center Access Layer 262 264 Configuring Access Layer Devices for IPv6 NIC-Teaming Considerations 267 Data ... design Integrating resiliency to avoid single points of failure is key for ensuring high availability and business continuity The coordinated use of resiliency capabilities within the switch, link,...

Ngày tải lên: 31/05/2014, 01:15

... the Internet In the illustration, the intranet data center connects to the data center core through redundant Layer links The data center core simplifies connectivity among the various data center ... functions In general, these data centers can be classified into three types: • Internet • Extranet • Intranet The Internet data center, which is used by external clients connecting from the Internet, ... engineers who are responsible for planning, designing, implementing, and operating enterprise data center networks Server Farm Security in the Business Ready Data Center Architecture v2.0 OL-7247-01...

Ngày tải lên: 09/12/2013, 17:15

... financial, manufacturing, consumer or information-based industries interested in constructing and deploying efficient and productive data centers Data centers house the applications and information critical ... Client 1-80 Integrating Microsoft Exchange Server 2007 in a Cisco Multisite Data Center Design ii OL-15350-01 Integrating Microsoft Exchange Server 2007 in a Cisco Multisite Data Center Design ... Center Locations Internet Edge DC/GC Edge CAS CAS DC/GC Single Active Directory Site Active CMS Data Center Standby CMS Hub Data Center 222768 Hub Integrating Microsoft Exchange Server 2007 in...

Ngày tải lên: 24/01/2014, 10:20

... Application produces data at fixed rate Processing at three layers of ATM causes delay Interleaving cells from different connections Operation and maintenance cell interleaving If using synchronous ... avoidance in opposite direction to packet required Forwards Congestion avoidance in same direction as packet required Categories of Explicit Signaling Binary A bit set in a packet indicates congestion ... congestion through network Interaction of Queues Ideal Performance Practical Performance Ideal assumes infinite buffers and no overhead Buffers are finite Overheads occur in exchanging congestion control...

Ngày tải lên: 06/03/2014, 09:21

... intractable In fact, intractability is an intrinsic property of the data association problems, no matter in VSN or in traditional multitargets tracking [9] In traditional MTT community, data association ... requisite information in belief networks and in uence diagrams,” in Proceedings of the Annual Conference on Uncertainty in Artificial Intelligence, 1998 [27] A Globerson and T Jaakkola, “Approximate inference ... for approximate inference in DBNs,” in Proceedings of the 17th Conference in Uncertainty in Artificial Intelligence, 2001 [29] F Hutter, N Brenda, and R Dearden, “Incremental thin junction trees...

Ngày tải lên: 21/06/2014, 05:20

... Cooperative Coding and Caching 3.1.1 Code words In C , instead of having full cardinality only, the combined data segments may have different cardinalities, from to N In addition, for each original data ... existing schemes have focused on achieving a full cardinality in data combination For example, the proposals in [11, 12, 15, 24] generally increase the cardinality by combining as much data as ... router buffer management [22], energy improvement in wireless networks [23], data gossiping [24], as well as data dissemination in sensor networks [11] and in peer-to-peer networks [15] For storage...

Ngày tải lên: 21/06/2014, 17:20

... on channel SNR, that is, Pi increases with increasing ζi ; and for ζi > ζi(o) , the power allocation is according to inversion in the channel SNR, that is, increasing ζi decreases Pi (2) The ... the global warming [25] Therefore, in the context of sensor networks, putting cap on the total power consumption conserves energy and limits the contribution to the global warming Since the optimization ... estimation in wireless sensor networks without considering the spatial correlation In this paper, we present a novel framework which incorporates adaptive power allocation (APA) in the network by taking...

Ngày tải lên: 21/06/2014, 17:20

... problems into full information game theoretic problems is an extremely difficult task due to distributed nature of WSNs In addition, full information sharing also results into additional energy and ... and the incomplete cooperative game are introduced in Section 2, respectively In Section 3, we present an improve backoff algorithm to improve the energy efficiency of MAC protocol in WSNs Finally, ... but all these information are not necessarily available in incomplete information game [13] 2.1 Incomplete Cooperative Game As we mentioned earlier, energy efficiency of MAC protocol in WSN is very...

Ngày tải lên: 21/06/2014, 17:20

... Reinforcement learning using WINTER algorithm in walking scenario: (a) initial prediction window size is set to 0.08 and the future testing window size is set to 0.12; (b) initial prediction window ... of the time windows consists of two operations: expanding, that is, increasing the window size by one time point, and shrinking, that is, decreasing the window size by one time point The collector ... adaptively adjust the time windows by applying the reinforcement learning mechanism from the beginning of the whole procedure Reinforcement learning is a machine learning technique that deals with...

Ngày tải lên: 21/06/2014, 18:20

... before sending its TargetInfo message The collection of TargetInfo messages is fulfilled in a time window in each cycling time step Any TargetInfo message arriving after this time window will ... initialization, intracluster collaboration, intercluster collaboration, and task termination are four main aspects when implementing tracking function, which are detailed in this section 3.1 Tracking Task Initialization ... the broadcasting of time series data is very energy consuming Therefore, the CH will choose the reference node according to the SNRs and residual energy values contained in TargetInfo messages...

Ngày tải lên: 21/06/2014, 20:20

... Rajaraman, “Wave scheduling: energy- efficient data dissemination for sensor networks, ” in Proceedings of the International Workshop on Data Management for Sensor Networks in Conjunction with VLDB ... continuous data dissemination in wireless sensor networks, ” in Proceedings of the 1st International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP ’04), Melbourne, ... discussed in our previous work [33] and are discussed here again briefly Energy of Node, IE,i In order to increase the lifetime of WSN, low -energy nodes are avoided in routing This is achieved by maintaining...

Ngày tải lên: 21/06/2014, 23:20

... sequence d for INTRAS: d = m k p , mindex , mindex ∈ M, (10) with M being the available index set for the morphing index mindex The cardinality of M should be small enough that mindex (e.g., a ... (1) In creating a new scrambled symbol, the focus is on the values within a limited window including previous values In other words, there are values of interest at the current sampling index ... side information in COM The input to the morphing function is the concatenation of k p and the morphing index mindex Due to the avalanche effect, even small changes due to the short morphing index...

Ngày tải lên: 22/06/2014, 00:20

... the sink node and performed inside the network, such as eliminating irrelevant records and aggregating raw data, which is referred to as in- network data processing and data aggregation Since ... J Ahn, “Optimizing data replication for expanding ring-based queries in wireless sensor networks, ” in Proceedings of the 4th International Symposium on Modeling and Optimization in Mobile, Ad ... communication in WSNs is of a broadcast nature, transmitting data at a consolidated frequency can potentially cut down the total amount of transmitted data, leading to savings in energy consumption Taking...

Ngày tải lên: 22/06/2014, 19:20

... a data- gathering scheme for sensor network with a mobile sink In this scheme, we distribute three key tasks of a data- gathering period, which are moving the sink, collecting data, and notifying ... the destination sector for the energy mower in each data- gathering period The basic principle of the algorithm is trying to avoid leading the energy mower close to quasi-hotspots while moving towards ... MoveDest After visiting all the points once, the energy mower determines which point is the appropriate position to force MoveDest to transport most data in one data- gathering period The energy mower...

Ngày tải lên: 22/06/2014, 19:20

... quality instead of energy savings On the contrary, α coefficients near will promote energy savings instead of a higher resolution of the final image This choice will depend on the application in which ... the destination node to store the data in sequence before decoding and playing out the image The destination node substitutes zero for missing data due to lost packets As said before, a data packet ... Comparison of resulting images by applying different prioritization strategies and packet discarding the energy savings Let us show this statement by applying different α in our model Graphics in Figure...

Ngày tải lên: 22/06/2014, 22:20

... ambient intelligence paradigms Exploiting this continuously improving energy Achieving Energy Efficiency in Analogue and Mixed Signal Integrated Circuit Design 25 efficiency and advances in energy ... potential high energy efficiency In (Shin et al 2008), a 10 bits pipelined ADC based in zerocrossing detector fabricated using 65nm CMOS technology is reported Another pipelined zero-crossing detector ... removing op-amps, as it has been explained in section 2.3.2, a less aggressive technique consists in keeping the op-amp but adding helper circuits that increase the energy efficiency by relaxing...

Ngày tải lên: 27/06/2014, 00:20

... Figure 2.7) Database Instance Database Instance Database Instance Database Instance Marshall_AU3931_C002.indd 23 Service Partitioning Operating System Figure 2.7 Service Partitioning 4/13/2006 11:28:48 ... Installing a Guest Operating System Installing Windows Server 2003 in a Virtual Machine VMware Tools for a Windows Installation ... settings Common examples of service partitioning systems include database and web server applications In a database server application, a single instance of the database server executes within...

Ngày tải lên: 08/08/2014, 21:21