3、Action算子,这类算子会触发SparkContext提交作业。 针对action算子,foreach、collect、collectAsMap、reduceByKeyLocally、lookup、count、top、 reduce、fold、aggregate。大致就是这几项了。 一、Value数据类型的Transformation算子 1)map val a = sc...
端至端延迟。图6C条显示的平均终端到终端 延迟方位，DSR和AODV协议。方位具有最低 终端到终端的大部分时间延迟。最终的端到端延迟 AODV协议是非常类似的DOA，而DSR路由有很多 高端到终端比其他两个协议的延迟。 在DOA，我们期待一个较小的终端到终端的延误，因为 路由修复机制迅速恢复一个破碎的路线 和...
No.3 关于Windows Vista安装过程 Windows Vista安装过程详细图解请参看请见本贴6楼 附录 - Vista安装详细流程 No.4 关于Windows Vista安装过程出现的部分错误 1.安装时出现“Setup was unable to locate a locally attached hard drive suitable for holding temporary Setup files.”提示！解决方法：在...
如果你的机器上有两个网卡的话,那就有三个图标了。如果你只有一个网卡,那就在"我的连接"图标上点右键,选"属性",会出来一个"我的连接 属性"的窗口。在图口上部有一个"连接时使用:"的标识,下面就是你机器上的网卡型号了。在下面有一个"配置"按钮,点击该按钮后就进入了网卡的属性对话框了,这个对话框中有...
going to the beach or swimming at public pools, traveling and sightseeing locally and nationally. Secondly, summer is a pleasant season for all kinds of cold foods and juicy fruits. Ice cream is our all time favourite dessert. Yeh, I love ice cream so much. I have to eat som...
篮球的创始人是詹姆斯·奈史密斯（James Naismith）。他是加拿大人，于1891年创造了篮球这项运动。当时，奈史密斯是美国春田学院的体育教师，他希望设计一项能够在室内进行的活动，以填补冬季室内运动的空白。于是他创造了篮球，并制定了最早的篮球规则。随后篮球逐渐发展成为一项全球性的运动，并成为奥运会...
however, the price of milk at the local Excello Food Market has increased from $1.50 to over $3.00 per gallon. To prevent farmers from continuing to receive excessive profits on an apparently increased supply of milk, the Batavia government should begin to regulate retail milk pr...
C what 很显然，这是个宾语从句，而引导词又在句子中做主语，所以宾语从句中能做主语的引导词只有what 故选A 如果要选where 的话，引导词在从句中应该做状语，例如We came to where the trees were carefully shaped 我们来到了一个树木被细心修剪过的地方。that的话引导词应该在从句中做宾语。wh...
going to the beach or swimming at public pools,traveling and sightseeing locally and nationally. however,some of them try to make good use of their vacations in gaining their working experiences in summer.other students may try to improve their academic performance by going to their s...
the receiver continually monitors the line. Once the start bit is detected, the receiver waits until the end of start bit, and then samples the next N bits at their centers, using a clock generated locally by the receiver. As each incoming bit is sampled, it is used to constr...