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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...拷贝，从节点压力会不会过大？
数据压力大到机器支撑不了的时候能否做到自动扩展？
这篇文章看完这些问题就可以搞定了。NoSQL的产生就是为了解决大数据量、高扩展性、高性能、灵活数据模型、高可用性。但是光通过主...
WebRTC - scalable live stream broadcasting / multicasting
... current implementation of this that is relevant and mature is Adobe Flash Player, which has supported p2p multicast for peer to peer video broadcasting since version 10.1.
http://tomkrcha.com/?p=1526.
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Compare dates in MySQL
...
You can try below query,
select * from players
where
us_reg_date between '2000-07-05'
and
DATE_ADD('2011-11-10',INTERVAL 1 DAY)
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improve this ans...
efficient way to implement paging
...d in this blog post here.
SELECT TOP 10 first_name, last_name, score
FROM players
WHERE (score < @previousScore)
OR (score = @previousScore AND player_id < @previousPlayerId)
ORDER BY score DESC, player_id DESC
The @previousScore and @previousPlayerId values are the respective values of ...
Android Debug Bridge (adb) device - no permissions [duplicate]
... ENV{ID_GPHOTO2}="1", ENV{GPHOTO2_DRIVER}="proprietary", \
ENV{ID_MEDIA_PLAYER}="1", MODE="0664", GROUP="plugdev"
./40-libgphoto2-2.rules:ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="6860", \
ENV{ID_GPHOTO2}="1", ENV{GPHOTO2_DRIVER}="proprietary", \
ENV{ID_MEDIA_PLAYER}="1", MODE="0664", GROUP...
浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...平时使用交易系统的遇到的几个运维状态
1、系统登录不了，
一般是怎么操作的？
第一步，用户反映到我们的维护人员
第二步，维护人员鸡飞狗跳的去找原因，服务器，网络，防火墙，ISP，操作系统，应用服务，软件配置...
苹果全球开发者大会：无硬件 iOS 9等三大系统更新 - 资讯 - 清泛网 - 专注C...
...显示的程序。另外，画中画功能支持在主屏幕上显示视频播放小窗口，用户甚至可以把视频图像隐藏起来，仅收听声音。
iOS 9今天开始向开发者提供测试版本下载，公开测试版7月推出，预计9月底正式版将与iPhone 6s同时推出。iPh...
How do I define and use an ENUM in Objective-C?
...le as shown below, and declared a variable of that type in my interface as PlayerState thePlayerState; and used the variable in my methods. But I am getting errors stating that it is undeclared. How do I correctly declare and use a variable of type PlayerState in my methods?:
...
How to create a MySQL hierarchical recursive query
... 2 |
| 6 | PORTABLE ELECTRONICS | 1 |
| 7 | MP3 PLAYERS | 6 |
| 8 | FLASH | 7 |
| 9 | CD PLAYERS | 6 |
| 10 | 2 WAY RADIOS | 6 |
+-------------+----------------------+--------+
Que...
苦逼的年轻人和年薪百万的区别到底在哪里？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...两个月 on call一周——世界各地分公司及客户工程师解决不了的问题，打电话给值日生，他们必须 24 小时待命，即时解决。
微软哥 23 岁，单身独居，大年三十on call，我可怜他，叫他来家里蹭饺子。
一帮留学然后留下的朋友，...