命令行：
暂时生效，适合于做测试，或者线上马上服务修改，重启失效
CONFIG set stop-writes-on-bgsave-error no OK CONFIG get stop-writes-on-bgsave-error 1) "stop-writes-on-bgsave-error" 2) "no"
配置
在config文件里直接修改，redis重启时读取文件生效
