On 02/11/2014 09:00 AM, [email protected] wrote:
Hi, I'll add $.02 more to this discussion.
Galera does not use the MySQL Pluggable Storage Engine Aarchitecture
(PSEA), because Galera needs, as pointed out by Justin, more interaction
with other storage engines (InnoDB currently, TokuDB in future) and
MySQL server, than what is provided by PSEA.
So the patches in the server code add a new API that offers more than
PSEA offers, right?
But nevertheless, Galera is still a plugin. MySQL wsrep patch implements
a different plugin framework, which allows replication plugins, like
Galera, to be loaded and taken is use in MySQL server. Galera plugin can
be enabled and disabled by configuration (wsrep_provider=
<pointer-to-plugin-library> | none). When disabled, the server should
work as vanilla MySQL | MariaDB server, with no feature nor performance
impact.
Really? I actually understood that it was not possible to disable it
this way, so this really makes me confused now. Maybe the Galera/wresp
plugin/patch is too ambiguous, so just to confirm I understand it
correctly now: It is totally OK to use the MariaDB server with necessary
enhancements (patches in the code) but without wresp/Galera plugin
installed and use it without any feature nor performance impact, right?
Thanks for the respond,
Honza
-seppo
Quoting Justin Swanhart <[email protected]>:
Hi,
As I understand it, Galera doesn't work through the pluggable storage
engine API, so adding it via the engine interface is not an option. It
intercepts the binary log capture process, implements a global
transaction
identifier and wire transaction state prototocol (wsrep), and is tightly
integrated with InnoDB so as to trigger deadlocks on incoming replication
write conflicts. It is not possible to use Galera with TokuDB or MyISAM
for this reason (though MyISAM is technically supported, it is not a good
idea). Because it only works with InnoDB and MyISAM (barely), it makes
sense (at least to me) to make it a separate package.
Just my $.02
On Mon, Feb 10, 2014 at 11:11 PM, Honza Horak <[email protected]> wrote:
Hi guys,
my Google-foo is poor today and I can't find any discussion about
"inclusion of Codership's Galera patch to standard code-source of
MariaDB".
I'd like to see that one could just use the wresp plugin and have a
working
Galera cluster (even if that would mean to introduce new engine) without
having another instance of the package.
Is that technically possible at all and if so, are there any thoughts
like
this?
Thanks,
Honza
_______________________________________________
Mailing list: https://launchpad.net/~maria-discuss
Post to : [email protected]
Unsubscribe : https://launchpad.net/~maria-discuss
More help : https://help.launchpad.net/ListHelp
--
http://www.codership.com [email protected]
tel: +358 40 510 5938 skype: seppo_jaakola
_______________________________________________
Mailing list: https://launchpad.net/~maria-discuss
Post to : [email protected]
Unsubscribe : https://launchpad.net/~maria-discuss
More help : https://help.launchpad.net/ListHelp
_______________________________________________
Mailing list: https://launchpad.net/~maria-discuss
Post to : [email protected]
Unsubscribe : https://launchpad.net/~maria-discuss
More help : https://help.launchpad.net/ListHelp
