<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[东坡居士的博客]]></title><description><![CDATA[兴趣使然的程序员]]></description><link>https://blog.youkuaiyun.com/aaronmer</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; aaronmer]]></copyright><item><title><![CDATA[Oracle获取权限内所有表的名称及数据量]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/141816343</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/141816343</guid><author>aaronmer</author><pubDate>Mon, 02 Sep 2024 11:56:52 +0800</pubDate><description><![CDATA[使用user_tables获取权限范围内所有表及数据量。]]></description><category></category></item><item><title><![CDATA[postgresql常用快捷命令]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/141193383</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/141193383</guid><author>aaronmer</author><pubDate>Wed, 14 Aug 2024 15:58:12 +0800</pubDate><description><![CDATA[数据库对象有表(table,简写t)、索引(index,简写i)、视图(view,简写v)、函数(function,简写f)、序列(sequence简写s)、权限§、用户或角色(u、g)\。通过此命令查看数据库命令帮助信息，本文中的所有命令都可以在帮助命令列表找到。可以看到本会话的所有操作历史，类似linux系统的history命令。命令\d加指定类型可以查看指定对象的信息，带+号展示信息更详细。执行成功会切换到指定的数据库。命令格式：\c 数据库名称。]]></description><category></category></item><item><title><![CDATA[pg_dump导出表结构和数据]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/141166402</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/141166402</guid><author>aaronmer</author><pubDate>Tue, 13 Aug 2024 16:02:29 +0800</pubDate><description><![CDATA[mpp数据库的master节点，切换到管理员用户执行此命令。]]></description><category></category></item><item><title><![CDATA[greenplum授权]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/141166073</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/141166073</guid><author>aaronmer</author><pubDate>Tue, 13 Aug 2024 15:52:05 +0800</pubDate><description><![CDATA[在Greenplum数据库中，表空间（Tablespace）是用于存储数据库对象的物理位置。通过授予创建、使用和修改模式的权限，您可以控制用户在数据库中创建、访问和修改对象的范围和权限。]]></description><category></category></item><item><title><![CDATA[linux 安装jdk步骤]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/112600713</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/112600713</guid><author>aaronmer</author><pubDate>Mon, 12 Aug 2024 11:17:12 +0800</pubDate><description><![CDATA[jdk安装]]></description><category></category></item><item><title><![CDATA[CentOS 挂载硬盘]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/113360288</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/113360288</guid><author>aaronmer</author><pubDate>Mon, 12 Aug 2024 10:54:09 +0800</pubDate><description><![CDATA[挂载磁盘]]></description><category></category></item><item><title><![CDATA[el-table-column字段格式化转换，formatter属性使用]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/141056900</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/141056900</guid><author>aaronmer</author><pubDate>Fri, 09 Aug 2024 11:14:56 +0800</pubDate><description><![CDATA[el-table-column formatter属性格式化内容]]></description><category></category></item><item><title><![CDATA[Redis cluster集群设置密码]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/135081480</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/135081480</guid><author>aaronmer</author><pubDate>Tue, 19 Dec 2023 11:57:14 +0800</pubDate><description><![CDATA[打开每个redis cluster节点的配置文件，添加下面两项密码选项,并保存。通过ssh连接工具链接所有redis cluster服务器。修改完配置文件，重启redis使之生效。链接每个redis集群节点。]]></description><category></category></item><item><title><![CDATA[redis cluster集群定时备份]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/135081107</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/135081107</guid><author>aaronmer</author><pubDate>Tue, 19 Dec 2023 11:45:45 +0800</pubDate><description><![CDATA[对于redis cluster,为了保证高可用，我们在保证并发能力的情况下，还要保证崩溃情况下恢复的能力，因此需要定时保存数据，以应对意外情况出现，下面提供了一种数据备份的设计方法。主节点采用rdb快照的方式进行备份，备份速度快，减少对主进程的影响。以下是备份脚本,可以通过contab命令定时执行如下脚本进行备份。从节点采用aof的形式备份，尽量完整的保存数据。]]></description><category></category></item><item><title><![CDATA[多git环境配置不同的用户]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/130823989</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/130823989</guid><author>aaronmer</author><pubDate>Tue, 23 May 2023 11:40:43 +0800</pubDate><description><![CDATA[gitlab，gitee和github配置不同的用户]]></description><category></category></item><item><title><![CDATA[nodejs安装及环境配置]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/130642599</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/130642599</guid><author>aaronmer</author><pubDate>Fri, 12 May 2023 15:49:58 +0800</pubDate><description><![CDATA[nodejs安装]]></description><category></category></item><item><title><![CDATA[python读取csv文件]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/130585711</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/130585711</guid><author>aaronmer</author><pubDate>Tue, 09 May 2023 18:09:15 +0800</pubDate><description><![CDATA[【代码】python读取csv文件。]]></description><category></category></item><item><title><![CDATA[标准差计算方式对比]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/130512696</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/130512696</guid><author>aaronmer</author><pubDate>Fri, 05 May 2023 18:26:13 +0800</pubDate><description><![CDATA[通过数学公式可以看到，每个参数都要计算与平均值的平方差，因此要首先计算出样本数据的平均值，再计算标准差，需要循环两次数组，计算示例代码如下。welford提出了一种计算算法，可以通过滚动计算的方式得出标准差，而不用计算所有样本数据，对于需要流式处理的数据比较友好。avg表示平均值，sum表示平方差。标准差的数学计算公式如下。]]></description><category></category></item><item><title><![CDATA[安装PCRE]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/130259482</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/130259482</guid><author>aaronmer</author><pubDate>Thu, 20 Apr 2023 09:52:09 +0800</pubDate><description><![CDATA[对当前文件夹授予全部读写权限。]]></description><category></category></item><item><title><![CDATA[在markdown中优雅的编写数学公式 - LaTeX]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/129852893</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/129852893</guid><author>aaronmer</author><pubDate>Thu, 30 Mar 2023 10:45:10 +0800</pubDate><description><![CDATA[作为经常使用markdown记录的人来说，纯文本操作是最优雅的，所以我们选择用LaTeX来记录数学公式，我们一起来看下常用公式的写法。]]></description><category></category></item><item><title><![CDATA[Anaconda3+python3.9+tensorflow环境配置]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/129527606</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/129527606</guid><author>aaronmer</author><pubDate>Tue, 14 Mar 2023 17:12:28 +0800</pubDate><description><![CDATA[安装anaconda和tensorflow]]></description><category></category></item><item><title><![CDATA[maven 阿里云镜像仓库配置]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/129387055</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/129387055</guid><author>aaronmer</author><pubDate>Tue, 07 Mar 2023 17:29:26 +0800</pubDate><description><![CDATA[maven 阿里云镜像仓库配置]]></description><category></category></item><item><title><![CDATA[2023年个人计划]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/128953401</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/128953401</guid><author>aaronmer</author><pubDate>Thu, 09 Feb 2023 15:09:43 +0800</pubDate><description><![CDATA[人生规划]]></description><category></category></item><item><title><![CDATA[tail命令使用示例]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/125188493</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/125188493</guid><author>aaronmer</author><pubDate>Wed, 08 Jun 2022 17:34:48 +0800</pubDate><description><![CDATA[tail 常用命令]]></description><category></category></item><item><title><![CDATA[grep命令常用用法示例]]></title><link>https://blog.youkuaiyun.com/aaronmer/article/details/125180160</link><guid>https://blog.youkuaiyun.com/aaronmer/article/details/125180160</guid><author>aaronmer</author><pubDate>Wed, 08 Jun 2022 10:47:54 +0800</pubDate><description><![CDATA[grep 常用命令示例]]></description><category></category></item></channel></rss>