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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...法重启，只能强制重启服务器了
两个节点同时编辑vi gfs_1.txt
同时操作，以最后修改后保存的文件为准。
i/o 测试
安装FIO 测试 I/0 读取速度
FIO 安装步骤http://blog.chinaunix.net/uid-8116903-id-3914246.html
...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
... 颜色模式：ARGB_8888
应用场景
图像编辑应用
照片处理工具
图像水印添加
图像格式转换
批量图像处理
创意图像效果
图像尺寸调整
图像属性分析
开源信息
源代码可在 GitHub 获...
What are the rules about using an underscore in a C++ identifier?
...HT_RIGHT
#define RIGHT_x_RIGHT
Extracts from C++0x draft
From the n3242.pdf file (I expect the final standard text to be similar):
17.6.3.3.2 Global names [global.names]
Certain sets of names and function signatures are always reserved to the implementation:
— Each name that conta...
Why does the JVM still not support tail-call optimization?
... interesting information.
http://www.ccs.neu.edu/scheme/pubs/esop2003-cf.pdf
http://www.ccs.neu.edu/scheme/pubs/cf-toplas04.pdf
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BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...它们的值。BSS 段的大小从可执行文件中得到，然后链接器得到这个大小的内存块，紧跟在数据段后面。当这个内存区进入程序的地址空间后全部清零。包含数据段和BSS 段的整个区段此时通常称为数据区。
BSS段 数据段 代码段 ...
Using emit vs calling a signal as if it's a regular function in Qt
...ble with pointers to every function that is connected.
Also, look at this pdf which explains very clearly the nature of the signals and slots mechanism:
http://www.elpauer.org/stuff/a_deeper_look_at_signals_and_slots.pdf
sh...
Rolling median algorithm in C
... For a similar technique, see this paper on frugal streaming: arxiv.org/pdf/1407.1121v1.pdf It can estimate any quartile and adapts to changes in the mean. It requires that you only store two values: last estimate and direction of last adjustment (+1 or -1). The algorithm is simple to implemen...
How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
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sizeLimit="100000" fileLimit="1" allowTypes="/(\.|\/)(pdf)$/" />
</h:form>
Bean.java
@ManagedBean
@ViewScoped
public class Submission implements Serializable {
private UploadedFile file;
//Gets
//Sets
public void uploadFasta(FileUploadEvent event) throws FileNo...
Memcached下一站：HandlerSocket！ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
shell> make
shell> make install
接着需要配置一下HandlerSocket，编辑MySQL配置文件，加入如下内容：
[mysqld]
loose_handlersocket_port = 9998
# the port number to bind to (for read requests)
loose_handlersocket_port_wr = 9999
# the port number to bind to (for write reque...
What is the function of the push / pop instructions used on registers in x86 assembly?
...s that techniques described at http://agner.org/optimize/microarchitecture.pdf suggest that push and pop take one single micro operation.
Johan mentions that since the Pentium M Intel uses a "stack engine", which stores precomputed esp+regsize and esp-regsize values, allowing push and pop to execu...