论坛站务软件水平考试华为认证计算机等级PMP认证思科认证Photoshop3DMAX编程语言移动开发系统运维产品运营淘宝营销办公软件Ps修图云计算大数据摄影就业

<p><section style="padding: 3px 8px; line-height: 1.4; font-family: inherit; display: inline-block; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-top-left-radius: 8px; border-top-right-radius: 8px; background-color: rgb(249, 110, 87);" class="tn-Powered-by-XIUMI"><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云计算成型期</section></section></p><section style="border: 1px solid rgb(249, 110, 87); color: rgb(51, 51, 51); font-family: inherit; text-decoration: inherit; margin-top: -1px; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px; word-wrap: break-word !important;" class="tn-Powered-by-XIUMI"><section style="padding: 16px; line-height: 1.4; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px;" class="tn-Powered-by-XIUMI"><p style="white-space: pre-wrap; word-wrap: break-word !important; min-height: 1em; max-width: 100%; box-sizing: border-box !important;">关于云计算的基础理论起源于半个世纪前。1966年出版的《计算机普及的挑战》一书中写道，<span style="color: rgb(255, 76, 65); word-wrap: break-word !important; max-width: 100%; box-sizing: border-box !important;">计算机的强大已经能为普通人提供信息和服务，但是设备又大又贵使得人们（在未来）不得不以远程访问的形式使用。</span>这时，效用计算问世。它意味着普通人也能获得计算资源，并且根据需要的计算资源实现按需付费。更重要的是，不像喝水要打井一样，人们使用计算资源时不再需要拥有自己的计算系统。</p><p style="white-space: pre-wrap; word-wrap: break-word !important; min-height: 1em; max-width: 100%; box-sizing: border-box !important;"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box !important;"/></p><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">上世纪70年代，Ken Thompson 和 Dennis Ritchie在贝尔实验室创立了UNIX和C语言编程。结合由Vint Cerf、Bob Kahn和朋友们一起设立的的ARPANET开放网络标准，云计算的方向已经初见雏形。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">在接下来的20年，DSL（另一个贝尔实验室的奇迹）的发明和普及，促使民用ISP的到来。而网格计算和应用服务提供商（ASP）展示了云计算思维带来的效益。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">很快，到了20世纪末，全民一下子都在“点击”上网了。数据中心所提供的规模经济此时最好地彰显了集中式计算带来的优势。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云计算的时代到来了。</section></section></section><p><img src="/Public/forum/ueditor/image/20160128/1453951838434800.png" title="1453951838434800.png" alt="blob.png"/></p><p><section style="padding: 3px 8px; line-height: 1.4; font-family: inherit; display: inline-block; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-top-left-radius: 8px; border-top-right-radius: 8px; background-color: rgb(249, 110, 87);" class="tn-Powered-by-XIUMI"><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云计算的第一代</section></section></p><section style="border: 1px solid rgb(249, 110, 87); color: rgb(51, 51, 51); font-family: inherit; text-decoration: inherit; margin-top: -1px; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px; word-wrap: break-word !important;" class="tn-Powered-by-XIUMI"><section style="padding: 16px; line-height: 1.4; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px;" class="tn-Powered-by-XIUMI"><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">现代云计算的代表非1999年的Salesforce.com莫属。它销售的是一个简单的商业服务：客户关系管理CRM。CRM很简单——公司通常用它来记录产品卖给了哪些客户、卖了哪些产品、如何保证顾客满意度。在Salesforce.com之前，公司都是购买或编写客户关系管理软件，并在本地的计算机上运行。Salesforce推出CRM之后，相较过去并不是将副本交给客户，而是它在自己的数据中心运行，出售每个用户的访问权限。软件从未像之前的副本一样传递，客户除了登陆Salesforce.com、注册账户、登录、开始工作以外，无需再做任何的部署。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">这看起来就像是用Gmail比Outlook要方便得多。但是Salesforce.com比Gmail早了8年。自从那时起，云计算开始广泛运用到各个领域。</section></section></section><p><img src="/Public/forum/ueditor/image/20160128/1453951854155349.png" title="1453951854155349.png" alt="blob.png"/></p><p><section style="padding: 3px 8px; line-height: 1.4; font-family: inherit; display: inline-block; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-top-left-radius: 8px; border-top-right-radius: 8px; background-color: rgb(249, 110, 87);" class="tn-Powered-by-XIUMI"><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云技术的全景</section></section></p><section style="border: 1px solid rgb(249, 110, 87); color: rgb(51, 51, 51); font-family: inherit; text-decoration: inherit; margin-top: -1px; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px; word-wrap: break-word !important;" class="tn-Powered-by-XIUMI"><section style="padding: 16px; line-height: 1.4; word-wrap: break-word !important; max-width: 100%; box-sizing: border-box; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px;" class="tn-Powered-by-XIUMI"><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云在我们心中的印象非常简单，但是形态各异。Gmail、Salesforce.com或者任何你需要通过网页浏览到的东西，统称为SaaS，软件即服务。这也是大部分用户所认知到“云”的形态。另外还有两个缩写经常用来描述不同云的形态，分别是PaaS（平台即服务）和IaaS（基础架构即服务）。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">有了原始的计算资源服务，你可以运行自己的软件（PaaS），或者能拥有你想用的硬件（IaaS）。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box !important;"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">云已经成为移动平台的有力推动者。如果没有云计算的第一波浪潮，我们就无法见证第二波移动应用服务的浪潮。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">没有云的话一些app根本不会存在。<span style="color: rgb(255, 76, 65); word-wrap: break-word !important; max-width: 100%; box-sizing: border-box !important;">在移动时代，本质上说你真的打开了一扇通往云层的窗户，大部分移动端的处理，都发生在云上。</span></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box !important;"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">SaaS和移动数据分享app是我们大多数人能接触到的公有云。Salesforce.com运行一切、存储一切、控制一切，使用者可以是任何人。他们不需要保存或者维护什么资料，只需确保电脑联网即可。同时，他们只需为服务付费，不用雇佣IT员工、购买基础设施、保持硬件（服务器）更新等等。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">除了公有云，还有很多私有云服务。使用私有云的公司仍然沿用公有云的技术，但所有的运行都是在幕后的（不面向公开的网络）。云计算系统可以快速扩容，并且能很快给不同的用户分发数据。有了私有云后，所有的内容都可通过一个网络浏览器访问，而非运行在员工本人的机器上。其结果是，员工可以在一个熟悉的以浏览器为基础的工作环境中操作。并且它更容易连接起传统的、没有架设到公有云上的软件系统。</section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"><br style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI"/></section><section style="word-wrap: break-word !important; max-width: 100%; box-sizing: border-box;" class="tn-Powered-by-XIUMI">有人认为私有云是一种良性木马，把公有云的一些革命性的因素纳入到企业IT这个相当保守的世界中。经验丰富的人可能还会记得一开始软件还是用CD承载，后续慢慢有了定期的bug修复和新版本推送。所以，基于云的系统的更新速度变得更快。</section></section></section><p><br/></p>

论坛站务软件水平考试华为认证计算机等级PMP认证思科认证Photoshop3DMAX编程语言移动开发系统运维产品运营淘宝营销办公软件Ps修图云计算大数据摄影就业