Hi all,
I have setup a cluster with 2 data-nodes (node 1 in datacenter 1 and node 2 in datacenter 2) and 1 arbitrator in datacenter 3 and my first tests shows that all the traffic between the data-nodes is also relayed across the arbitrator.
I have simulated a traffic delay of 1000ms in the arbitrator with:
tc qdisc del dev eth1 root netem delay 1000ms
and all the write database activity (inserts, update, etc) is delayed.
WITHOUT DELAY:
mysql> insert into t10 values(1);
Query OK, 1 row affected (0,03 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (0,02 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (0,02 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (0,01 sec)
WITH DELAY:
mysql> insert into t10 values(1);
Query OK, 1 row affected (1,61 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (1,88 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (1,10 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (1,15 sec)
mysql> insert into t10 values(1);
Query OK, 1 row affected (1,16 sec)
Is there any way to skip this behaviour? I only want to setup the arbitrator in a third datacenter in order to avoid a possible split brain between datacenter 1 and 2.
Thanks in advance,
Best Regards.