逻辑备份(Logical backup)保存的是创建数据库(CREATE DATABASE)和生成数据(INSERT 语句或者文本文件)的 SQL 脚本,适合小型的数据库。 6.1.2 在线备份与离线备份 在线备份(Online backup)是指在 MySQL 服务器运行时进行的备份,也称为热备。热备时其他客户端可以连接到 MySQL 服务器,并且可以执行的数据操作;备份工具...
Step 1.Run EaseUS Data Recovery Wizard on your computer. Choose the drive where you lost files and click "Search for Lost Data". If your lost files were on an external storage device, connect it to your computer firstly. Step 2.The software will quickly scan the deleted files immediately...
Recovery组件会从donor上复制所有新节点缺失的数据对应的binlog,然后应用在自身。当新节点数据和组中已经保持一致,则新节点成功加入到组,它将标记为ONLINE。 实际上,这只是恢复的一个阶段,还有第二阶段,有了上面的基础,下面的解释就容易理解了。 在新节点准备开始加入组的时候,Recovery组件有两个功能:(1).选择donor...
This is the MySQL Reference Manual. It documents MySQL 8.0 through 8.0.42, as well as NDB Cluster releases based on version 8.0 ofNDBthrough 8.0.41, respectively. It may include documentation of features of MySQL versions that have not yet been released. For information about which versions ha...
affected by online recovery than by online backup because recovery requires stronger locking. During backup, clients might be able to read data while it is being backed up. Recovery modifies data and does not just read it, so clients must be prevented from accessing data while it is being ...
SwitchType String 切换类型,可能的返回值为:TRANSFER - 数据迁移;MASTER2SLAVE - 主备切换;RECOVERY - 主从恢复示例值:MASTER2SLAVE DatabasePrivilege 数据库权限 被如下接口引用:DescribeAccountPrivileges, ModifyAccountPrivileges。 名称类型必选描述 Privileges Array of String 是 权限信息示例值:["CREATE","DROP...
During an incremental migration, do not perform the point-in-time recovery (PITR) operation on the source database. During an incremental migration, resumable upload is supported. However, data may be repeatedly inserted into a non-transactional table that does not have a primary key when the ...
On the Data Recovery Portal tables uploaded in an archive we restore using this method. If on whatever reason the structure can’t be recovered this way it’ll try mysqlfrm. mysqlfrm utility Easier and more reliable way is to use mysqlfrm utility from Oracle. ...
OnlineDDL的方式,ALGORITHM=COPY时,期间会阻塞DML(只读),最后主副表rename操作时(不可读写),直到DDL完成(其中需要的时间不确定)。 Gh-ost的方式,推荐的模式为连接从库,在主库转换,此模式对主库影响最小,可通过参数设置流控。致命的缺点是此工具的变更时间太长,4亿的表,测试环境使用了70个小时。最后我们还需要...
修复重建列存索引(IMCI)不支持Online重建导致列存索引可用性问题。 修复库表多写集群批量添加列存索引,未完全适配DDL全局锁导致崩溃的问题。 修复JSON_TABLE存在NULL Field场景下导致查询崩溃的问题。 修复多主Buffer Pool Resize和事务访问块冲突问题,并优化多主Buffer Pool RDMA register或unregister的性能。