my.cnf slave

[client]
port        = 3306
socket        = /tmp/mysql.sock

[mysqld]
port        = 3306
socket        = /tmp/mysql.sock
skip-locking
key_buffer = 16M
max_allowed_packet = 1M
table_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
skip-federated

###################   slave  ##########################
server-id    = 2
master-host=192.168.1.221
master-user=reply
master-password=reply123456
replicate-do-db =mydns
log-bin=n01-bin
slave-net-timeout=60

####################################################

long_query_time = 5
expire_logs_days= 3
thread_concurrency = 8
thread_cache_size = 64
max_connections = 4000
query_cache_size = 256M
open_files_limit = 10000
max_heap_table_size = 64M
innodb_file_per_table
innodb_flush_method=O_DIRECT   
innodb_buffer_pool_size=120M
innodb_additional_mem_pool_size=100M
innodb_support_xa=0   
innodb_thread_concurrency=0
innodb_flush_log_at_trx_commit=1
#####################################
interactive_timeout=180
wait_timeout=180
#####################################



[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout