vSS: vSwitches are configured on each ESXi/ESX host. vDS: The configuration of vDS is centralized to vCenter Server. The ESXi/ESX 4.x and ESXi 5.x hosts that belong to a dvSwitch do not need further configuration to be compliant.   These features are…

Using LACP with a vSphere Distributed Switch 5.1 by Chris Wahl on Oct 15th, 2012 | 6,347 views One of the more exciting and eagerly anticipated announcements in vSphere 5.1 (at least for me) were all the distributed switch enhancements. Among the new…

参考博客: https://www.cnblogs.com/balingybj/p/5751707.html  Switch的思考 Switch与If--else的比较 switch...case与if...else的根本区别在于, switch...case会生成一个跳转表来指示实际的case分支的地址,而这个跳转表的索引号与switch变量的值是相等的.从而,switch...case不用像if...else那样遍历条件分支直到命中条件,而只需访问对应索引号的表项从而到达定位分支的目的. 具…

第三章 选择语句 3.1选择语句--Switch switch语句格式: ```java switch(表达式){ case 常量值1: 语句体1; break; case 常量值2: 语句体2; break; default: 语句体 break; } ``` 执行流程 首先计算出表达式 其次,和case依次比较,一旦有对应的值,就会执行相应的语句,在执行的过程中,遇到break就会结束 最后如果所有的case都和表达式的值不匹配,就会执行default语句具体部分,然后程序结束 案例: pu…

break 使用break结束循环  break可以终止循环 和 switch语句的运行; break用于结束一个循环,即跳出循环体,执行循环体之后的代码: switch 使用continue提前结束本次循环 return return关键字不是专门用于结束循环,return的功能时结束一个方法.当一个方法遇到return语句时,这个方法将被结束. 方法结束 , 执行权回到方法调用处 : continue与break的区别  …

1.  一般情况下,它们两个语句可以相互替换 2.  switch..case语句通常处理case为比较确定值的情况,而if...else...语句更加灵活,常用于范围判断(大于.等于某个范围) 3.  switch语句进行条件判断后直接执行到程序的条件语句,效率更高.而if..else语句有几种条件,就得判断少次. 4.  当分支比较少时,if...else语句的执行效率比switch语句高. 5.  当分支比较多时,switch语句的执行效率比较高,而且结构更清晰.…

http://www.raspberry-pi-geek.com/Archive/2013/01/Adding-an-On-Off-switch-to-your-Raspberry-Pi#article_f5 Which Switch? Aaron Shaw Pulling the plug on your Pi without an orderly shutdown can corrupt the SD card. Also, many users prefer a convenient sw…

How long does it take to make a context switch?   FROM: http://blog.tsunanet.net/2010/11/how-long-does-it-take-to-make-context.html That's a interesting question I'm willing to spend some of my time on. Someone at StumbleUpon emitted the hypothesis t…

FROM: http://blog.tsunanet.net/2010/11/how-long-does-it-take-to-make-context.html That's a interesting question I'm willing to spend some of my time on. Someone at StumbleUpon emitted the hypothesis that with all the improvements in the Nehalem archi…

目录 文章目录 目录 OpenFlow 架构 OpenFlow 标准和规范 OpenFlow 的端口(Port) OpenFlow 的流表(Flow Table) OpenFlow 的组表(Group Table) OpenFlow 的 Meter 表 OpenFlow 的通信通道 OpenFlow 协议及相关数据结构 OpenFlow 的版本变化 OpenFlow 1.0 OpenFlow 1.1 OpenFlow 1.2 OpenFlow 1.3 OpenFlow 1.4 OpenFlow…