11:49 美人她爹回归! » laolu's blog: Blog

从访问统计里发现,美人她爹国庆节里重新blogging,欢迎回归!

对于ReadWriteWeb的那帖子,他有个简译,而且夹带了不少私活,推荐一下

11:33 Yammer获奖TechCrunch50和企业微博客 » laolu's blog: Blog


图片来源:TechCrunch

9月10日,TechCrunch50落幕,Yammer胜出。TechCrunch50有52个创业项目登场,值得一看。简单地说,Yammer是一个企业版的Twitter,就是把类似Twitter的微博客文本消息系统,应用到企业内部。9月9日Yammer上线第一天,即获得1万个人和2千机构的注册,可见需求不小。用户注册需要使用公司邮箱,才能与同一公司的其他人保持联系。如果一家公司需要取得对其下用户的管理控制,那就要付费。闪亮的商业模式。

有报道"Yammer为企业提供类似Twitter的特性(Yammer Offers Twitter-Like Features for Businesses)":Yammer今年才由David Sacks (PayPal的前COO,Geni的现CEO)创立,原是作为Geni.com(家族网站,有关此类网站的介绍见小林的博客)的内部工具,因为公司需要社会化网络的特性,但又需要置于安全和私密的状态。因解决了Geni自己的需要,且发展为完整的部分,最终决定单独成为公司。Yammer与Twitter的最大区别,就是公司为取得安全和管理控制而付费。这些特性包括:密码政策、限制进入的IP范围、用户的品牌标志,以及对内容和用户的管理。收费标准是每人每月$1(上线一周已有1万企业注册,收益似乎不错)。另一个很好的特性是可以对发送的信息打标签(tag),用户不仅能追随(follow)个人,也能追随tag,以便及时获得相关信息。安全性也是一个方面。服务器有防火墙,访问默认为SSL保护。与Twitter相似的是,可以用多种方式发送和接受信息,包括:网页、iPhone应用、黑莓应用、桌面应用、SMS、IM或、Email。

VentureBeat上也有帖子报道:TC50: Twitter-for-business startup Yammer wins TechCrunch50, I may eat my hat(其中有个图引用见下):


图片来源:VentureBeat

CNET有报道Business microblog tool Present.ly is smarter than Yammer,认为Yammer创新还不够,有做得更好的,比如同样为同事之间保持实时联系的present.ly:有不少超过Yammer的特性,比如支持文件附件,这对工作场合比较有用;还有可安装在公司防火墙之内的版本。收费政策是5用户以内免费,超过的话每人每月$1。


图片来源:CNET

Forrester Research专攻社会化计算(Social Computing)的高级分析师Jeremiah Owyang,写过一个企业微博客工具的列表(List of Enterprise Microblogging Tools: Twitter for the Intranet):

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07:41 Announce: Front End Performance Optimization » MySQL Performance Blog

I guess many of you know us and so our company for MySQL related services. It is true this is majority of our business at this point but it is far from everything.

Our goal in reality is to help people to build and operate quality systems, typically web sites, which means we help customers with performance, scalability, high availability as the whole, not just MySQL related issues.

Indeed if you look at MySQL driven web site its properties will likely depend on a lot of factors - good web side configuration, which is about caching, proxying, using multiple data centers or CDN, serving static content reliably and efficiently. Then it comes to efficient web application architecture and code - being scalable, efficient, highly available, secure and fault tolerant. Caching in particular as memcache plays important role here besides MySQL though quite typical you also would see external queue, message parsing, search systems etc being important components besides MySQL.

MySQL is important component but just a component, though due to its complexity it is often where
professional help is looked for dealing with scaling and high availability.

Even more. Everything what we’ve described is only part of the problem. It is all about generating dynamic content quickly or serving static files which is only one side of the problem. The other side is making things fast from the client prospective where our new service - front end performance optimization comes to play.

We look to reduce number of requests and transfer size. Browser and HTTP Caching (Request not made is far better than even fastest serviced request), making content download as parallel as possible and making page to start render as soon as possible.

Front End performance optimization is often needed to change your site from good to great. Market leaders such as Google tend to do it a lot and it is well known fast loading web pages improve user experience and make people to stay on site longer and return more likely which in the end improves business goals such as showing advertisements, product downloads or purchases.

Some people make a mistake by thinking their site are already great by looking at their web site from location which is close to the data center. This gives huge available bandwidth with pretty much no packet loss as well as very low latency.

Most likely these conditions are not the case for all of your users and customers - some may be accessing the system from remote location with high latency and packet loss. Others may be accessing it via crowded public wireless connections and there is class of mobile users with less than perfect latency and download speeds a lot slower than home/office broadband.

This especially comes as important issue to me personally then I’m traveling or using mobile Internet for other reasons - so many web sites become so painfully slow they are barely usable even though their backend does not perform any slower in this case.

By adding front end optimization services we are able to help to deliver great performing web sites whatever performance limiting factors are.

P.S As this is the new service we’re looking for feedback on how to make it better. If you’re interested in your site evaluation and would be willing to provide us feedback about recommendations and general service delivery, drop us a note and we’ll pick couple of sites to review free of charge.


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