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OceanBase使用libeasy原理源码分析:服务器端 - 数据库(内核) - 清泛网 - ...
...EASY_OK,则signal信号量,从而工作线程被唤醒。
典型的,select请求这种需要回复多个包给MySQL客户端的场景使用的都是这种模式
其它诸如只需要回复一个包给MySQL客户端的DML操作,例如INSERT,UPDATE等也使用这种模式,只是工作线程...
How does Google Instant work?
...ive. The search results are from the first autocomplete suggestion (or the selected one if you hit the down arrow or mouse over a suggestion).
In other words if I type "vinyl s", the first autocomplete suggestion is "vinyl siding," and the search results clearly show a search for "vinyl siding." If...
What is the list of supported languages/locales on Android?
...ble for application development (they may not necessarily be available for selection in a given device's system settings, though). When using ISO 639-1 codes, the resource folder has the format values-xx... where xx is the ISO-639-1 code.
When using BCP 47 tags, the resource folder is named valu...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...个)。
reactor模式,实现自己的多路复用NIO机制(epoll,select,kqueue等)
单线程处理多任务
数据结构
hash+bucket结构,当链表的长度过长时,会采取迁移的措施(扩展原来两倍的hash表,把数据迁移过去,expand+rehash)
持久化存...
How does Duff's device work?
...ed]
do { // [skipped]
*to = *from++; // [skipped]
case 7: *to = *from++; // [skipped]
case 6: *to = *from++; // [skipped]
case 5: *to = *from++; // [skipped]
case 4: *to = *from++; // Start here. Copy 1 byte...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...
Let's get one thing out of the way first. The explanation that yield from g is equivalent to for v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warrant adding yield from ...
Difference in months between two dates
...through" months with fewer days. I've inverted the logic (so that it goes from early to later than vice versa) and now accumulates the months without modifying the current date (and thus passing through in-between months with fewer days) Still not entirely sure what the ideal result should be when...
Accessing items in an collections.OrderedDict by index
...tainers project has a SortedDict type for just this purpose.
>>> from sortedcontainers import SortedDict
>>> sd = SortedDict()
>>> sd['foo'] = 'python'
>>> sd['bar'] = 'spam'
>>> print sd.iloc[0] # Note that 'bar' comes before 'foo' in sort order.
'bar'
...
WAMP 403 Forbidden message on Windows 7
...
The access to your Apache server is forbidden from addresses other than 127.0.0.1 in httpd.conf (Apache's config file) :
<Directory "c:/wamp/www/">
Options Indexes FollowSymLinks
AllowOverride all
Order Deny,Allow
Deny from all
Allow from 127.0...
Python: reload component Y imported with 'from X import Y'?
...
@cschol: Zen of Python, last verse (import this from interactive prompt to see the Zen of Python); and all the reasons why namespaces are a honking great idea (immediate local visual clues that the name's being looked up, ease of mocking/injecting in tests, ability to relo...
