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从网购到火车票，对比淘宝12306网为何如此烂？ - 大数据 & AI - 清泛网 - ...
...15TB日志，访问1931亿次内存数据块，13亿个物理读，核心MySQL集群一天支持了20亿个事务。
淘宝的技术人员以实际行动让网民折服，虽然在淘宝双十一活动刚开始的10分钟内的访问高峰期内，购物车和支付宝都出现了打不开的情况...
Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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Note, MySQL doesn't allow default values on TEXT/BLOB columns. Otherwise this is the ideal solution
– Andrew Vit
Mar 20 '13 at 18:35
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Database Design for Tagging
...s-performance-tests/
Note that the conclusions there are very specific to MySQL, which (at least in 2005 at the time that was written) had very poor full text indexing characteristics.
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impr...
Case conventions on element names?
...been partial to PascalCase for Elements and camelCase for attributes:
<Root>
<ParentElement attributeId="1">
<ChildElement attributeName="foo" />
</ParentElement>
</Root>
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How do I rename a repository on GitHub?
...om following the steps above, you need to make sure your local repository (root folder) is renamed properly and it's pointing to the right remote url :) link. In order to achieve that, do the following:
You might want to use the new given name for your repo. To do so, rename the local folder eithe...
IIS 500.19 with 0x80070005 The requested page cannot be accessed because the related configuration d
...ight click on folder you need to give security permission to. This is the root folder where you application is published and is the same folder as your IIS website physical path. Choose properties from the context menu and click on the Security tab. Edit users, and then Add a user. Click the Loc...
Vagrant ssh authentication failure
... You can do it by copy-and-pasting or using a tool like ssh-copy-id (user: root password: vagrant port: 2222) ssh-copy-id '-p 2222 root@127.0.0.1'
If still does not work try this:
Remove insecure_private_key file from c:\Users\USERNAME\.vagrant.d\insecure_private_key
Run vagrant up (vagrant will...
How do I do word Stemming or Lemmatization?
...A stemmer is supposed to turn inflected forms of words down to some common root. It's not really a stemmer's job to make that root a 'proper' dictionary word. For that you need to look at morphological/orthographic analysers.
I think this question is about more or less the same thing, and Kaarel's ...
Select records from NOW() -1 Day
Is there a way in a MySQL statement to order records (through a date stamp) by >= NOW() -1 so all records from the day before today to the future are selected?
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Where can I find php.ini?
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Use the following commands to find the php.ini file path in linux.
[root@AnyDirectory ~]# locate php.ini
/etc/php.ini
/etc/php.ini.rpmnew
/usr/share/doc/php-common-5.4.45/php.ini-development
/usr/share/doc/php-common-5.4.45/php.ini-production
or try this another way
[root@AnyDirectory ~]...