discussions. Figure 1.1 depicts the high-level building blocks for WSCs. A set of low-end servers, typ-ically in a 1U3 or blade enclosure format, ar. mounted within a rack and interconnected …

MapReduce runtime schedules the map tasks and the reduce task to the nodes of a WSC. ... How soon will the next task come? Software mechanism handles slow task since it can hold up the …

• A rack can hold 48 1U servers (1U is 1.75 inches high and is the maximum height for a server unit) • A rack switch is used for communication within and out of a rack; an array switch …

2016年7月13日 · 今天把Google的《The Datacenter as a Computer》看了一遍，它介绍了谷歌的一种数据中心类型——Warehouse-scale computers (WSC)。 那么这种类型的数据中心跟传 …

Lecture 24: WSC, Datacenters • Topics: network-on-chip wrap-up, warehouse-scale computing and datacenters (Sections 6.1-6.7)

Power Usage Effectiveness (PUE): − Power efficiency measure for WSC, not including efficiency of servers, networking gear − Power usage for non-IT equipment increases PUE − 1.0 is …

PUE = 总设施功率 / IT 设备功率 PUE必须大于1；值越大，WSC 的效率越低。 典型值范围从 1.33 到 3.03，中值为 1.69。 进行的实验表明，所有 WSC 的 Google 平均 PUE 为 …

Energy-Proportional Computing: Design Goal of WSC Energy = Power x Time, Efficiency = Computation / Energy Desire: Consume almost no power when idle (“Doing nothing well”) …

The WSC goal is to make the hardware/software in the warehouse act like a single computer that typically runs a variety of applications. The largest cost in a conventional datacenter is the...

... FIGURE 1.1: Architecture of WSC; Typical elements in warehouse-scale systems: 1U server (left), rack with Ethernet switch (middle), and diagram of a small cluster with a clusterlevel …