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SSH免密码登陆教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

SSH免密码登陆教程假设 A 为客户机器,B为目标机;要达到的目的:A机器ssh登录B机器无需输入密码;加密方式选 rsa|dsa均可以,默认dsa做法:1、登录A机器2...假设 A 为客户机器,B为目标机; 要达到的目的: A机器ssh登录B机器...
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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

...综合考虑各种因素(是否满足高并发高性能,Session保持如何解决,负载均衡的算法如何,支持压缩,缓存的内存消耗);下面基于几种常用的负载均衡软件做个介绍。 LVS,工作在4层,Linux实现的高性能高并发、可伸缩性、可靠...
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mysql blob大小配置介绍 - 爬虫/数据库 - 清泛IT社区,为创新赋能!

...理器(如数据库管理器)不去理会文件是什么,而是关心如何去处理它。但也有专家强调,这种处理大数据对象的方法是把双刃剑,它有可能引发一些问题,如存储的二进制文件过大,会使数据库的性能下降。在数据库中存放体...
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PDOException SQLSTATE[HY000] [2002] No such file or directory

... The error message indicates that a MySQL connection via socket is tried (which is not supported). In the context of Laravel (artisan), you probably want to use a different / the correct environment. Eg: php artisan migrate --env=production (or whatever enviro...
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How to re-sync the Mysql DB if Master and slave have different database incase of Mysql replication?

Mysql Server1 is running as MASTER . Mysql Server2 is running as SLAVE . 14 Answers ...
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App Inventor 2 多用户预订系统如何设计? - App Inventor 2 中文网 - 清泛...

问:我遇到了一个难题,我开发了一个软件,两个手机都安装了同一个软件,我在一个手机上显示按钮已经不能启用,但在另一个手机上该按钮确还能用,我的目标是这个跟酒店房间一样,当某个房间有人订了,其他人就不能订...
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How to automatically start a service when running a docker container?

I have a Dockerfile to install MySQL server in a container, which I then start like this: 11 Answers ...
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网

...本文主要介绍一款较为通用、价格低廉的BLE设备从零开始如何利用App Inventor 2开发一款自己专属的手机蓝牙App应用。 BLE与经典蓝牙的区别可参考:《低功耗蓝牙(BLE) 和 经典蓝牙(SPP) 的区别》。 本文主要通过一款常见的BLE硬件...
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UnicodeEncodeError: 'latin-1' codec can't encode character

...his encoding allows any character to be used. You should also ideally tell MySQL you are using UTF-8 strings (by setting the database connection and the collation on string columns), so it can get case-insensitive comparison and sorting right. ...
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Import CSV to mysql table

What is the best/fastest way to upload a csv file into a mysql table? I would like for the first row of data be used as the column names. ...