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README
LGPL-3.0
# gpmagic【特别感谢Ryan Wei[魏一]大神起了个高大上的名字】    
不得将代码用于任何商业目的  
旨在分享----个人行为  
作者:
陈淼
邮箱:
miaochen@mail.ustc.edu.cn      

截止目前,安装、备份、恢复、同步、ddl备份恢复等已经全面支持GP6版本!!!!!!    

!!!【在5.20.0和5.20.1版本上暂时无法使用gpmcbackup命令,因为存在Utility模式COPY问题,BUG】!!! 
【目前已经修改代码,不带条件可以使用】
【最新的版本不能直接替换以前的版本,因为日志文件格式发生了变化】
Master的备份目录下的last_stat.tag文件需要为每一行追加;.gz

使用备份恢复命令,请将  
gpddlbackup  
gpddlrestore  
gpmcbackup  
gpmcrestore  
四个文件直接拷贝到$GPHOME/bin/目录下,修改owner为gpadmin和mod为755:  
[gpadmin@mdw ~]$ cd $GPHOME/bin  
[gpadmin@mdw bin]$ chown gpadmin. gp{mc,ddl}*  
[gpadmin@mdw bin]$ chmod 755 gp{mc,ddl}*  
使用说明可以参考命令的help信息和word文档  
gpddlbackup已经经过较大范围验证,欢迎试用  

!!!【不能使用gpdbtransfer以5.20.0和5.20.1作为源端,因为存在Utility模式COPY问题,BUG】!!! 
【目前已经修改代码,不带条件可以使用】
使用跨集群数据传输命令,请将  
gpdbtransfer  
文件直接拷贝到$GPHOME/bin/目录下,修改owner为gpadmin和mod为755:  
[gpadmin@mdw ~]$ cd $GPHOME/bin  
[gpadmin@mdw bin]$ chown gpadmin. gpdbtransfer  
[gpadmin@mdw bin]$ chmod 755 gpdbtransfer  
使用说明可以参考命令的help信息或readme目录中查看  

gpdbcluster命令目前已经经过全面重构、逻辑上更加清晰和严谨、欢迎试用    
#建议慎重用于生产环境    
#目前已经强化了Standby激活的逻辑,如果无法判断Master的状态就不切换,    
#因为,如果gpactivatestandby命令本身也无法判断Master状态的话,    
#可能会出现Master和Standby都活着的冲突状态,
#目前进行了进一步强化,常规的Master状态判断使用pg_sleep进行长时间保持,    
#如果第一次检测到异常,将会马上再进行3次简单测试,只有4次都异常才认为Master访问异常,   
#这一机制的完善主要用于避免可能出现检测SQL被误杀的情况,    
#对于出现连接数超过限制的情况,将认为数据库状态是正常的,不会予以切换
GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below. 0. Additional Definitions. As used herein, "this License" refers to version 3 of the GNU Lesser General Public License, and the "GNU GPL" refers to version 3 of the GNU General Public License. "The Library" refers to a covered work governed by this License, other than an Application or a Combined Work as defined below. An "Application" is any work that makes use of an interface provided by the Library, but which is not otherwise based on the Library. 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