maria-discuss team mailing list archive

[Guillaume Lefranc <guillaume@xxxxxxxxxxxx>]

Hi Bertrand,

you should always have an odd number of servers (3, 5, 7) - even number is
a risk of split brain, or use weights so you give priority to specific
servers.
You should also use a load balancer which redirects query to an available
node, ex: HAProxy, MaxScale, GLBD...

Does the split brain happen because of network issues?

2015-10-24 15:34 GMT+02:00 Bertrand Caplet <bertrand.caplet@xxxxxxxxxx>:

> Hi all,
> I have a galera cluster of 4 MariaDB server and sometimes a node fail.
> But when a node fail, others nodes doesn't want to respond to query.
> I have in log : "MYSQL: query failed: WSREP has not yet prepared node
> for application use"
> It's really embarrassing, because it happen like once a week.
>
> Is there a parameter to modify to get this working even when split brain ?
> Like If 2 of the 4 server are ok, I can still make query ?
>
> Thanks in advance,
>
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