rpl_relayspace.test

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

# The slave is started with relay_log_space_limit=10 bytes,
# to force the deadlock after one event.

source include/master-slave.inc;
connection slave;
stop slave;
connection master;
# This will generate a master's binlog > 10 bytes
create table t1 (a int);
drop table t1;
create table t1 (a int);
drop table t1;
connection slave;
reset slave;
start slave io_thread;
# Give the I/O thread time to block.
let $run= 1;
let $counter= 300;
while ($run)
{
  let $io_state= query_get_value("SHOW SLAVE STATUS", Slave_IO_State, 1);
  if (`SELECT '$io_state' = 'Waiting for the slave SQL thread to free enough relay log space'`){
    let $run= 0;
  }
  sleep 0.1;
  if (!$counter){
   --echo "Failed while waiting for slave IO thread block"
   SHOW SLAVE STATUS;
   exit;
  }
  dec $counter;
}
sleep 2;
# A bug caused the I/O thread to refuse stopping.
stop slave io_thread;
reset slave;
start slave;
# The I/O thread stops filling the relay log when
# it's >10b. And the SQL thread cannot purge this relay log
# as purge is done only when the SQL thread switches to another
# relay log, which does not exist here.
# So we should have a deadlock.
# if it is not resolved automatically we'll detect
# it with master_pos_wait that waits for farther than 1Ob;
# it will timeout after 10 seconds;
# also the slave will probably not cooperate to shutdown
# (as 2 threads are locked)
select master_pos_wait('master-bin.001',200,6)=-1;

# End of 4.1 tests