MySQL replication复制中主-从是通过进行数据同步（）

A.Redo log

B.Binlog

C.文件系统

D.磁盘备份

A.Mysql NDB Cluster

B.Mysql Replication

C.Distributed Replicated Block Device (DRBD) and Mysql

D.Windows Cluster and Mysql

E.Solaris Cluster and Mysql

A.IO Replication

B.IO Mirror

C.Hyper Mirror

D.Hyper Replication

A.NDB Cluster

B.Replication

C.Innodb Engine

D.xecution Plan

A.Creating, dropping, and modifying tables and indexes

B.Initiating a binary backup of the database by using the START BACKUP command

C.Displaying replication status information

D.Shutting down the server by using the SHUTDOWN command

E.Creating and dropping databases

F.Creating and administering users

A.Both technologies guarantee an identical copy of data on the secondary node

B.Only MySQL can maintain a time-delayed copy of data on the secondary node

C.Both technologies use the TCP/IP stack as their primary transmission medium

D.DRBD uses shared-disk technology

A.It implements High Availability by using the .NET Connector‘s‘ load balancing capabilities

B.It is shared-nothing architecture

C.It is provided by means of IP- level disk replication

D.It relies on the shared disk architecture being visible to both servers

以下关于 vSphere Replication 虚拟设备的说法中，哪些是正确的？()

A它可以与一个或多个 vCenter Server 系统配对。

B它只能接收 100 个入站复制。

C它只与内置免管理型数据库兼容。

D它可与多台 vSphere Replication 服务器进行协作。

E它负责映射数据存储和运行恢复计划测试。

vSphere 实施中的变更数据块跟踪 (CBT) 的用途是什么？ ()

A由 vCenter Server 用来减小快照大小。

B由 vSphere Replication 用来同步复制操作。

C由 VDP 用来降低备份操作所需的时间和带宽要求。

D由 VMkernel 用来缩短虚拟机复制操作所需的时间。

inary logs Has the read-only optionThe replication slave has been found in an error state.You check the MySQL error log file and find the following entries:2013-08-27 13:55:44 9056 [ERROR] Slave SQL: Could not execute Write_rows event on table test.tl; Duplicate entry ‘3’ for key’PRIMARY’ , Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event’s master log 56_master-bin.000003, end_log_pas 653, Error_code: 10622013-08-27 13:55:44 9056 [Warning] Salve: Duplicate entry ‘3’ for key ‘PRIMARY’Error_code: 10622013-08-27 13:55:44 9056 [ERROR] Error running query, slave SQL thread aborted. Fix theproblem, and restart the slave SQL thread with SLAVE START”, We stopped at log ‘56_masterbin.000003’ position 496 What are two possible causes for this error to occur？（）

A.The slave was created with mysqldump –u root –p – skip-lock-table—all-databases ＞ /data/data.sql

B.The slave user does have INSERT, UPDATE, or DELETE permission and cannot execute the write_rows function

C.For tables with UNIQUE keys, statement-based replication must be used maintain integrity

D.The root user on the slave has executed FLUSH LOGS, causing the relay-log to doublewrite

E.The applications have the SUPER privilege, which allows them to update rows