ctiy:PRIMARY>uselocalswitchedtodblocalctiy:PRIMARY>db.oplog.rs.stats().maxSize//查看大小NumberLong("53687091200")//这里为50G，单位为Bctiy:PRIMARY>uselocalswitchedtodblocalctiy:PRIMARY>db.adminCommand
MySQL主从复制不在叙述，以下是mycat的部署过程：从GitHub上下载mycat，此本版是：Mycat-server-1.6.7.51·解压下载好的tar包：tar-xfMycat-server-1.6.7.5-release-20200422133810-linux.tar.gzcdmycatcpschema.xmlschema.xml.bakcpserver.xmlserver.xml.
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