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Re: WL#4925 and multi-source replication


2013/3/15 Kristian Nielsen <knielsen@xxxxxxxxxxxxxxx>

> Isn't it? I do not have practical experience with MariaDB/MySQL in a HA
> setup,
> but I have always thought that DRBD was one of the best choices, being a
> simple and robust solution.

Yoshinori Matsunobu described available solutions with pros and cons here :

> > I can test things, patchs, but I don't know what ... I didn't found
> > WL#4925 patch
> > so I can't test it.
> We do not currently have any patch or plans for pre-allocation of binlog.

This morning I've removed DRBD to verify that it is not the bottleneck, and
.... It's much faster with DRBD !

I didn't found anywere if Bug#13669 (http://bugs.mysql.com/bug.php?id=13669)
was fixed, but it's seems to, as I see Binlog_commits
=~ Binlog_group_commits. So I still have performance problems and perhaps
WL#4925 could help .... or I'll have to buy some better hardware.


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