本文转载自wordpress啦
SS是简单内容聚合（ Real Simple Syndication）的简称。它可帮助你实现聚合所有的新闻和博客资源到一个易于管理的RSS阅读器，如谷歌阅读器上。 数百万人都用RSS获取Mashable、纽约时报等新闻资讯。
然而，它也有其局限性，最大的局限性就是速度。 从博客上的文章发布到到达RSS订阅用户的阅读器上可能要花几分钟到几小时的时间。这也是为什么越来越多的人选择直接查看实时网站服务如Twitter、FriendFeed 来获得新闻的最大原因。可在实时网站中，发布的新闻、信息又却不尽都能如人意。
现在WordPress做了巨大改变，克服了RSS订阅时时间拖延问题，使得WordPress.com的750万博客以及其他自建WordPress博客实了实时RSS订阅。它使用了RSSCloud，使得即刻聚集博客的内容成为了可能。不过，要使你的WordPress博客的RSS能像Twitter那样的速度，还有一些工作要做。
RSSCloud和WordPress.com
WordPress创始人Matt今天早上在一篇博文中 解释了新发现WordPress 博客系统支持RSSCloud。从本质上来说就是，大多数的RSS阅读器只允许间隔性地检查服务器以获取内容的更新，但是RSSCloud可让服务器实时 跟新。这样一来，原本你需要花15分钟才能将你博客文章聚集给订阅用户，现在只要文章一发布就会立即聚集到订阅者的RSS订阅器上。
现在很多feed的用户通常都是一个小时服务器才更新一次。你想象下要是让你等一个小时才能收到邮件，你会是什么感受？(世界本该更高效的) 。RSS Cloud 是你的RSS feed一个额外元素，有了它，订阅者才可以真正意义上说“嗨，有更新立马通知我哦。”
虽然RSSCloud出现已经有些时日了，但是WordPress对其的支持却近日才有的。就如ReadWriteWeb解释道： 现在每一个WordPress.com 上的博客，他们的RSSCloud 都是激活的，大概有750万个博客并且这个数据还在扩大。另外，对于自己建立的WordPress博客，你也可以下载RSSCloud WordPress 插件，自己安装。WordPress 也打算通过其它方式使得其它RSS订阅时间更短，包括：Jabber, email, Weblogs.com pings, SUP, pubsubhubbub, Twitter 等。
WordPress也许可以实现实时，不过RSS实时还尚早
虽然WordPress.com支持RSSCloud了，但不意味着所有的RSS feeds 也能保证实时的功能。它需要原始的RSS feed网站和订阅者的RSS阅读器都支持RSSCloud。实际上，如果谷歌和outlook不支持RSSCloud的话，这项技术就没有太大的意义 了。
不过，RSSCloud却也很快获得了很多人的支持。River2 目前就支持RSSCloud，LazyFeed 也刚刚宣布将来要支持RSSCloud。不过这些都还是小角色，很快你就会看到像谷歌这样的巨头也会支持它的。实时RSS的优势实在不容忽视。
一旦RSSCloud能获得各方的支持后，我们将会看到RSS一场彻底革新的变革到来。跟Twitter的跟新一样迅速，RSS将会迎来复活时代。 我们将会看到新的应用程序和开发者使用RSSCloud 使实时瞬间新闻成为可能。在RSS上的实时会话也成为可能，这意味着全新blogging即将到来。
WordPress + RSSCloud 将可能成为一个分水岭，带领我们走进一个真正的实时互联网时代。
附原文：
WordPress Enters Real-Time: 7.5 Million Blogs Reach Twitter Speed
RSS, short for Really Simple Syndication, helps you stream all of your news and blog sources into an easy-to-manage RSS reader such as Google Reader. Millions of people use RSS to keep up with Mashable, The New York Times, and even LOLcats.However, it does have its limitations. The big one is speed. It can take minutes to hours for a blog post to reach the reader through RSS. This has been a big reason why more and more people are turning to real-time services like TwitterTwitter
and FriendFeedFriendFeed
for their news. In the real-time web, delayed news and information just isn’t good enough.
Now WordPress has done something big that eliminates that RSS delay problem and brings WordPressWordPress.com’s 7.5 million blogs into real-time, along with any other self-hosted WordPress blog. It has implemented RSSCloud, an RSS element that makes instant syndication of blog posts possible. However, it does have a few obstacles to overcome before your RSS is just like Twitter.
RSSCloud and WordPress.com
WordPress founder Matt Mullengweg explained the blog network’s newfound support for RSSCloud in a blog post earlier today. Essentially, while most RSS readers only periodically check servers for updates, RSSCloud makes checking for updates instantaneous. The result is that instead of waiting 15 minutes for your blog post to be syndicated, it will happen instantaneously:
Right now how most people interact with feeds is by checking that it updated every now and then, usually about once an hour. Can you imagine waiting an hour to get your emails? (The world would probably be more productive.) RSS Cloud is an extra element in your RSS feed that allows subscribers to say “Hey, let me know as soon as you’ve updated, kthx.”
While RSSCloud has been around for a while, WordPress’s support of the element is nothing short of monumental. As ReadWriteWeb explains, RSSCloud is now active on every blog hosted on WordPress.com, which numbers around 7.5 million and growing. There’s also an RSSCloud WordPress plugin for self-hosted installs of the popular blog software.
WordPress also intends to support other ways to make RSS more real-time, which could include integratio nwith “Jabber, email, Weblogs.com pings, SUP, pubsubhubbub, Twitter” and more.
WordPress May Be Realtime, but RSS Isn’t Quite Yet
WordPress.com supporting RSSCloud doesn’t mean that your RSS feeds are instantly real-time though. It requires support by both the originator of the RSS feed and the RSS reader. Essentially this change is useless if Google ReaderGoogle Reader
and Outlook don’t support it.
The support RSSCloud movement is gaining traction quickly, though. Dave Winer’s River2 currently supports it and LazyFeed just announced RSSCloud in the future as well. While these are small players, you can expect big players like GoogleGoogle to support it soon. The advantages to real-time RSS are just too large to ignore.
Once that happens, we could see a whole new revolution revolve around RSS. With updates as fast as Twitter, RSS could see a renaissance in terms of usage and innovation. We could be seeing new apps and developers using RSSCloud to make news instant. Real-time conversations are possible in RSS as well, meaning we could see a whole new form of blogging really soon.
WordPress + RSSCloud could be the watershed moment that really pushes us into the real-time era of the web. Hopefully you’ll be getting MashableMashable in your RSS reader instantly very, very soon.