mysql双向复制问题？

songpure520

我单向复制已经成功，然后我启动双向复制之后，在从服务器上用show master status;显示为空，而主服务器上的日志为：

081020 21:21:34 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.0.45-log'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  Source distribution
081020 21:21:34 [Note] Slave SQL thread initialized, starting replication in log 'FIRST' at position 0, relay log '/var/run/mysqld/mysqld-relay-bin.000005' position: 98
081020 21:21:34 [Note] Slave I/O thread: connected to master 'bakup@192.168.0.85:3306',  replication started in log 'FIRST' at position 4
081020 21:21:34 [ERROR] Error reading packet from server: Binary log is not open ( server_errno=1236)
081020 21:21:34 [ERROR] Got fatal error 1236: 'Binary log is not open' from master when reading data from binary log
081020 21:21:34 [Note] Slave I/O thread exiting, read up to log 'FIRST', position 4

主服务器的配置文件：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
skip-innodb
server-id=1
log-bin=/var/run/mysqld/mysqld-bin
binlog-do-db=test
#relay-log
master-host=192.168.0.85
master-user=bakup
master-password=000000
master-port=3306
replicate-do-db=sc
master-connect-retry=10
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
sync-binlog=1
old_passwords=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

从服务器的配置文件：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
skip-innodb
server-id=2
master-host=192.168.0.86
master-user=bakup
master-password=000000
master-port=3306
master-connect-retry=10
replicate-do-db=test
binlog-do-db=sc
relay-log
log-bin
sync-binlog=1
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

也就说从服务器的master功能并没有启动起来！！请高手指点一下

yueliangdao0608

http://blog.chinaunix.net/u/29134/showart_441667.html

songpure520

做双击互备，如果互备的是同一个数据库，两台同时都写，那不会发生冲突啊！如果只有一台写！那做双击互备也没什么意义啊，只做单向复制就行了啊！
我采取的是这种方案！版主大人看看，看可行不可行：
两台服务器A  B  ，B复制A是test数据库，A复制B是bakup数据库，在A上面读写的是test数据库，而在B上面读写的是bakup服务器，这样是不是可以避免冲突问题啊！或者表自增字段问题啊！请指点一下？？？