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TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...馈不错。
经过我的测试，用MongoDB需要102G的数据，采用默认的zlib压缩方式导入TokuMX之后，只有481MB，同时，导入速度大大提高（至少有10倍的提高），而查询性能没有降低。这个对比是我不敢想像的，直接解决了现在的问题。
...
Check orientation on Android phone
...anything, because nothing is changing, because the launcher has locked the screen orientation and doesn't allow it to change. So it is correct that .orientation doesn't change, because the orientation hasn't changed. The screen is still portrait.
– hackbod
Fe...
How to find the operating system version using JavaScript?
...wig)
*/
(function (window) {
{
var unknown = '-';
// screen
var screenSize = '';
if (screen.width) {
width = (screen.width) ? screen.width : '';
height = (screen.height) ? screen.height : '';
screenSize += '' + width + " x " +...
How can I save a screenshot directly to a file in Windows? [closed]
In Windows XP, one can press Alt-PrintScreen to copy an image of the active window, or Ctrl-PrintScreen to copy an image of the full desktop.
...
How to detect user inactivity in Android
...Count down timer starts and logs out user after 5 mins
OR user turns the screen OFF.
----> Count down timer starts and logs out user after 5 mins
...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...系统设置→高级→环境变量
新建JAVA_HOME:如果是默认安装路径那么就在这个路径下：C:\Program Files\Java\jdk1.8.0_171
新建Classpath： .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
在Path后面新增：%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin; 注意...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...。
这个过程同样也省略掉了with primary key关键字，它也是默认值。
create materialized view t_mv_test
refresh fast on demand
start with sysdate next sysdate+1/288 with primary key --默认值
as
select * from t_mv_test@dblink_name;
我们再分析一下物化视图的机...
App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...ice-md5=3c5c864d432cc2381b687f8d873e1429
rtype int 文件命名策略，默认0
0 为不重命名，返回冲突
1 为只要path冲突即重命名
2 为path冲突且block_list不同才重命名
3 为覆盖
4、文件上传
curl -F ‘file=@/Downloads/filename.jpg’ “https://d.pcs.baidu.c...
Kill detached screen session [closed]
I learned from somewhere a detached screen can be killed by
11 Answers
11
...
Is [UIScreen mainScreen].bounds.size becoming orientation-dependent in iOS8?
...: "View Controller Advancements in iOS 8"
Quote from the presentation:
UIScreen is now interface oriented:
[UIScreen bounds] now interface-oriented
[UIScreen applicationFrame] now interface-oriented
Status bar frame notifications are interface-oriented
Keyboard frame notifications are interface-...