江边闲话集

09/21/2010

IT人民有感

Filed under: I.T — 张太国 @ 14:04

昨天在地铁上,看见个小帅哥,拿着一个挺老款的手机看Java方面的教程,估计是txt文件的,这让我大为感动。这么多年了,也没看见我自己拿起一本专业教材在公共交通上学习,真是惭愧的不得了。

我发现,IT人民是最爱学习的,新技术更新的快,为了跟上步伐,不得不学习,不然就会落伍,甚至危及到工作。想想,这也被逼的。已经不止一次两次在地铁上看见IT人民搬着一块厚厚的砖头书在那里啃,我真佩服的不行了。

再说自己,已经不太爱花时间在专业书籍上。新的技术,了解一下,老的思想,翻一下书,也仅此作罢。我想,我真的应该抽一些时间在上面了,温故而知新,现在去读肯定和原来不一样。

IT人民是清纯的。一般来说,绝大部分做技术的都是单纯的,甚至有点漠然。这是优点,也是缺点。有点大家都明白,缺点嘛,很多。有时,不太爱交流,相个亲还沉默寡言,搞的个满脸通红。万一哪天开了家公司,接了个项目,还不好意思和别人张口多要点价,更加不用说欠钱不给了,这些事情见多了。

IT人民也是精英,技术中的精英。除了技术外,适当让自己的社会阅历,生活阅历增强一些。我只说是适当,不能太过,有时候很多人都会造成思想矛盾和碰撞,搞的自己不爽。要真是这样,那就活该了…

05/12/2010

百度股票分拆

Filed under: I.T — 张太国 @ 23:55

百度股票于2010年5月12日分拆,1拆10.也就是说现在的股价是原来的1/10,总股本为3.47亿股,截止现在报价76美元.分拆股票,太有意味了.

自从Google宣布撤出中国,百度股价一飞冲天,而Google股价坠入深渊.百度的市盈率已经100了.而Google才23.百度就那么看好么?

12/02/2008

Pownce is shutting down

Filed under: I.T — 张太国 @ 18:49

I got an email in this morning ,.it said Pownce is shutting down. OMG. It is a big surprise. The emails is below:

We are sad to announce that Pownce is shutting down on December 15,
2008. As of today, Pownce will no longer be accepting new users or new
pro accounts.    

To help with your transition, we have built an export tool so you can
save your content. You can find the export tool at Settings > Export.
Please export your content by December 15, 2008, as the site will not
be accessible after this date.

Please visit our new home to find out more:
http://www.sixapart.com/pownce

Our thanks go out to everyone who contributed to the Pownce community,

The Pownce Crew

09/18/2008

Linus关于Swap的讨论

Filed under: I.T — Tags: — 张太国 @ 16:36

Linus曾经在一个关于Swap的mail讨论中指出:

 In the course of discussion, it became clear that Linux 2.4.x required more swap than previous versions. Rik van Riel mentioned, “2.4 keeps dirty pages in the swap cache, so you will need more swap to run the same programs…” He asked Linus Torvalds, “is this something we want to keep or should we give the user the option to run in a mode where swap space is freed when we swap in something non-shared ?” Linus replied:

  I’d prefer just documenting it and keeping it. I’d hate to have two fairly different modes of behaviour. It’s always been the suggested “twice the amount of RAM”, although there’s historically been the “Linux doesn’t really need that much” that we just killed with 2.4.x.

  If you have 512MB of RAM, you can probably afford another 40GB or so of harddisk. They are disgustingly cheap these days.

  Zlatko Calusic worried that more data in swap would degrade performance because the disk head would need more seek time to find data. He asked if Linus was sure this would be okay, and Linus replied, “I’m not _sure_, obviously. However, one thing I _am_ sure of is that the sticky page-cache simplifies some things enormously, and make some things possible that simply weren’t possible before.” . But in a nearby post he admitted, “the sticky allocation _might_ make the IO we do be more spread out.” He felt it was important to consider these kinds of potential downsides, though he felt that in this case the benefits outweighed the drawbacks; and at one point Eric W. Biederman explained succinctly, “The tradeoff when implemented correctly is that writes will tend to be more spread out and reads should be better clustered together.”

  Zlatko ran some tests, and could not find any problems with the 2.4.0 memory management logic, though he added, “I have found that new kernel allocates 4 times more swap space under some circumstances. That may or may not be alarming, it remains to be seen.” At one point, Linus gave his overall take on 2.2/2.4 performance issues. He said:

  I personally think 2.4.x is going to be as fast or faster at just about anything. We do have some MM issues still to hash out, and tuning to do, but I’m absolutely convinced that 2.4.x is going to be a _lot_ easier to tune than 2.2.x ever was. The “scan the page tables without doing any IO” thing just makes the 2.4.x memory management several orders of magnitude more flexible than 2.2.x ever was.

  (This is why I worked so hard at getting the PageDirty semantics right in the last two months or so – and why I released 2.4.0 when I did. Getting PageDirty right was the big step to make all of the VM stuff possible in the first place. Even if it probably looked a bit foolhardy to change the semantics of “writepage()” quite radically just before 2.4 was released).

  Elsewhere, he considered the case of swapless or low-swap machines:

  If you don’t have any swap, or if you run out of swap, the major difference between 2.2.x and 2.4.x is probably going to be the oom handling: I suspect that 2.4.x might be more likely to kill things off sooner (but it tries to be graceful about which processes to kill).

  Not having any swap is going to be a performance issue for both 2.2.x and 2.4.x – Linux likes to push inactive dirty pages out to swap where they can lie around without bothering anybody, even if there is no _major_ memory crunch going on.

  If you do have swap, but it’s smaller than your available physical RAM, I suspect that the Linux-2.4 swap pre-allocate may cause that kind of performance degradation earlier than 2.2.x would have. Another way of putting this: in 2.2.x you could use a fairly small swap partition to pick up some of the slack, and in 2.4.x a really small swap-partition doesn’t really buy you much anything.

很有意思,值得看。

06/17/2008

Google Toolbar for Firefox3发布

Filed under: I.T — Tags: — 张太国 @ 14:39

我一直使用Firefox,如今Firefox3即将揭晓,Google为了配合Firefox,所以更新了一下Google Toolbar。真是千呼万唤始出来呀。等你丫的N久,从Firefox 3 beta ,到Firefox 3 RC,到今天。

Google Toolbar 下载地址: Toolbar 3

 

纪念一下而已。

05/22/2008

Flickr升级

Filed under: I.T — 张太国 @ 12:51

最近把Flickr的账户变成Pro了。但是后来银行告诉我多花了1美元。这令我诧异。于是看了一账单,发现2笔交易时间非常接近,大概20s左右。

尽管钱不多,但是还是要搞明白的,直接发了一个email过去。

过了一天,他们billing team的工作人员回复了一下,原来才知道是这么回事。内容如下:

Thank you for your recent email enquiry regarding Flickr Billing General.
We appreciate your inquiry in this regard. However, please
take note that Yahoo! will not settle the $1.00 amounts on your
statement. These are simply an anti-fraud verification process and they are
considered pre-authorization charges.  You should see them fall off of
your creditcard statement within a few days depending on your bank. I hope this
clears up the issue.

If you have any additional questions or comments, please feel free to contact us again.

Regards,
John
Yahoo! Customer Care
For assistance with all Yahoo! services please visit:
http://help.yahoo.com/

 

 

既然人家都这么说了,当然没有问题啦。就等过几天再看看吧。

03/10/2008

Microsoft Office该丢弃了

Filed under: I.T — Tags: — 张太国 @ 10:31

Microsoft Office Live Space Beta上线了,我小试了一把,感觉不错。而且Office的基本功能都用,这样我也不用安装Office软件了。

一直以来,我很少用Office软件,例如Word,Excel,PPT等,取而代之的是Google Docs,但是自从Office Live上线之后,看来我又有一个新的选择。

我不会这么快就会使用Office Live Space的服务,就目前而言,它的功能还不是特别好,即使和Google Docs一样的功能,或甚至多一点,我也不会用的。尽管Office Live Space是微软出的,而且大家都在用微软的Office,但是暂时也没有必要非得要换过去。再说用了这么久,也没有见到出现多大问题。

 

这么说,继续观察Office Live Space,同时继续使用Google Docs.

02/21/2008

WEB UI名片

Filed under: I.T — Tags: , — 张太国 @ 11:58

今天看见Fenng在Twitter留言道:

 腾讯的大爷们既然有功夫开发 QQ for Mac ,为什么不搞个 Web for Firefox 呢? 你看那些烂页面. 全中国最烂的 Web 设计师都在 腾讯

呵呵,有同感。腾讯的服务用的不多,除了QQ以外。但是偶尔到腾讯上去溜溜。之所以不是经常到腾讯上去,一个非常重要的因素就是其web设计的如狗屎般。除了腾讯之外,还有sohu和sina。我最喜欢的是163。可惜的是163的服务令我不太满意。所以最后直接奔赴sina,因为他的服务是我想要的,尽管其Web设计的如狗屎,忍了吧。

WEB UI名片,非常简单。就是看见网页,不用细看就知道是哪家公司的,国内恐怕只有阿里巴巴家族的是这么搞的。阿里巴巴,阿里妈妈,淘宝网,支付宝都是同一个风格的。记得当时阿里妈妈出来的时候,我根本不知道是那个公司的,但是凭着UI的直觉,这家肯定是阿里巴巴旗下的。

除此之外,还真找不出国内的其他公司。国外到是蛮多的,最有名的就是Google了,其次是37Signals下的几个服务。一看就知道其归属。

WEB UI就是自家的门面。你要是把UI做好了,做的有特色,人家会记住你的。但是你做的像臭狗屎一般,今天这个风格,明天那个风格,这对自个没有好处的。个人追求个性,难道公司就不用吗。

WEB UI就是名片,千万别忘了。

02/02/2008

MS买Yahoo一点看法

Filed under: I.T — Tags: , , — 张太国 @ 13:55

一下是我在博客园的发表一点看法:

#8楼

微软收购yahoo,最重要的一个目的就是拓展MS在web上的服务,微软在操作系统,应用软件如虎添翼,而在web上处处碰壁。以后肯定是web发展的必然趋势,仅仅靠微软现有的产品路线,犹如走进了死胡同。这几年微软打算早就自己在web上的实力,但是还是yahoo的流量最大,google次之。也没有像样的平台,至少目前我从来不用微软的搜索,hotmail,当然除了MSN。本来打算整合一个平台,就是live,可惜搞得不伦不类的。还有社区,其实个人感觉不错,但是就是赶不上人家,再好的产品没有用户也是白搭,一个失败。也许收购yahoo,是他正想要的。
支持MS收购Yahoo。
看看yahoo的股价,居然涨了47.81%,而google的股价跌了8%左右,这能说明什么呢?

#10楼

相信yahoo的董事会应该会同意该计划,有个担心的事实是管理部门会不会批准,不然又说什么垄断什么的,搞得微软都烦了。希望管理部门不会像欧盟那样为了一个media player罚款微软N亿美元。

#13楼

@A.Z!
你的说法我不赞同,微软其实以前也提出收购,为什么这次又提出,相信是为了增强在web方向的发展。微软不可能肯花446亿去买一个对自己用处不大的公司。除非董事会每个人都秀逗了。

更多参看这里

VERTU

Filed under: I.T — Tags: — 张太国 @ 09:18

Vertu是诺基亚的一个奢侈品牌 ,第一次了解到Vertu是在北京王府井新东方的二层。

既然是奢侈品,其价格肯定也是不菲的,记得当时看到的价格一般在40W元左右。我的天,一款手机居然这么贵,真是够奢侈的,倒不是因为这个手机有多好看多好用,而是其表面镶钻,既然有了钻石,能不贵么。连续2次到去北京到那里看,一次比一次贵。

据说这次Vertu又出了一款手机,全球只有8部,价格270W,中国有一部,那就是在复兴门百盛,(奇怪,这次怎么不是王府井呢),真是夸张了。当然,其表面上镶钻毋庸置疑。这款手机更夸张,手机表面有一条蟒蛇。真是奇丑无比。

对于这种奢侈品,咱们老百姓只能看看而已。但是,如果真要是哪天买的起,我也一定去买的,尽管很丑,毕竟是限量版呀,增值。哈哈!现在只是想想而已。

估计诺基亚不是为了卖,而是打造一款具有特色的品牌,突出诺基亚品牌的价值而已。

PS,新东方还有几个点不得不去。那就是Audi和大众的展示厅。 很多人认为Audi与宝马和奔驰,仅仅是一个很一般的品牌而已,你要是这么想,去哪里看看Audi的展示厅,恐怕出来之后为你有这样的想法脸红。Audi是大众的一个高档品牌,国内见得多的是A4,A6,Q7,A8,大众却是大众的一个普通品牌,例如帕萨特等,但有没有奢侈一点的呢?有,那就是辉腾,和宝马7系列一个级别的。

要是去北京的话,一定要去看看哟。

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