大约有 30,000 项符合查询结果(耗时:0.0319秒) [XML]

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Name node is in safe mode. Not able to leave

...d: bin/hadoop dfsadmin -safemode leave You are getting Unknown command error for your command as -safemode isn't a sub-command for hadoop fs, but it is of hadoop dfsadmin. Also after the above command, I would suggest you to once run hadoop fsck so that any inconsistencies crept in the hdfs mig...
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How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?

... 507 You can use dispatch_after to call a block later. In Xcode, start typing dispatch_after and hi...
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add created_at and updated_at fields to mongoose schemas

...eated_at field. ObjectIds have a method called getTimestamp(). ObjectId("507c7f79bcf86cd7994f6c0e").getTimestamp() This will return the following output: ISODate("2012-10-15T21:26:17Z") More info here How do I extract the created date out of a Mongo ObjectID In order to add updated_at filed...
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HTTPKeepAlive,开启还是关闭 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...百科里称为「HTTP Persistent Connection」,说白了就是复用HTTP连接,如此一来理论上客户端的用户体验...所谓「HTTP Keep-Alive」,在维基百科里称为「HTTP Persistent Connection」,说白了就是复用HTTP连接,如此一来理论上客户端的用户体验...
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Sql server默认的端口是多少?如何开启远程连接? - 更多技术 - 清泛网 - ...

Sql server默认的端口是多少?如何开启远程连接?默认是1433,可以在配置管理器中查看:需要开放1433端口,可以参考《Windows、Linux开放指定端口》。另外,开启远程连接还需要启用TCP IP,...默认是1433,可以在配置管理器中查看...
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How to view files in binary from bash?

... 507 xxd does both binary and hexadecimal. bin: xxd -b file hex: xxd file ...
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Copy a file in a sane, safe and efficient way

...for streams automatically call close(). codereview.stackexchange.com/q/540/507 – Martin York Jun 12 '13 at 19:48 11 ...
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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术

...凑,比如任何两个节点或直接或通过一个或多个中介机构连接。 第1点很明显,故意使用单词“通道”而不是使用“连接”这一点是为了描述模型工作的实际情况,即使IP多播或UDP等无连接的底层传输亦是如此。 第2点说明所有...
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浅谈服务器单I/O线程+工作者线程池模型架构及实现要点 - 更多技术 - 清泛...

...epoll实例; while(server running) { epoll等待事件; if(新连接到达且是有效连接) { accept此连接; 将此连接设置为non-blocking; 为此连接设置event(EPOLLIN | EPOLLET ...); 将此连接加入epoll监听队列; 从...
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C#连接有用户名密码验证的MongoDB - .NET(C#) - 清泛IT论坛,有思想、有深度

本帖最后由 zqp2013 于 2015-1-7 09:17 编辑 MongoDB连接字符串格式如下:mongodb://[username:password@]hostname[:port][/[database][?options]] 使用MongoVUE输入用户名密码能够连接MongoDB,但是使用C#如下代码连接时出现异常“Invalid credentials for databas...