October 3rd, 2011Percona Server 5.5.15 + Galera 21.1-beta2
Codership team published beta2 of MySQL 5.5.15 with Galera replication
https://launchpad.net/codership-mysql
and we made port to Percona Server:
source code:
lp:~percona-dev/percona-server/percona-server-galera-5.5.15
binaries for RedHat/CentOS 6:
http://www.percona.com/downloads/TESTING/Galera/Percona-XtraDB-Galera-5.5.15.tar.gz
What difference between Percona Server+Galera and MySQL 5.5.15 ?
First of course, Percona Server+Galera is based on our XtraDB engine.
Second, we provide wsrep_sst_xtrabackup script, which allows to use Percona XtraBackup for node provisioning.
Percona Server+Galera is still on early stage, and we make it available so you can play it to gain some play-and-touch experience.
So What is Percona Server+Galera at the end ?
I wrote about this previously, but I want to highlight some points again.
1. It is new High Availability + Scalability solution for MySQL.
And this solution is radically different from regular MySQL replication.
You can actually think about N-nodes Percona Server+Galera setup as Cluster.
where each node is active (accepts both reads and writes).
You can perform writes to ANY node.
Setup of 3-master active MySQL Replication is practically impossible.
2. In contrast to MySQL replication, in Percona Server+Galera schema
all nodes are CONSISTENT. Transaction either is commited on all nodes or
not commited at all. Forget about slaves being out-of-sync with master.
3. Nodes are able to apply events in parallel. And this is true parallel replication, not “per-schema” as in MySQL 5.6.
4. New node automatically joins to Cluster. No manual cloning of slave and copying to new box. Using Percona XtraBackup as transport to transfer data between nodes provides you minimal locking time.
You are welcome to try it.
