MariaDB Galera Cluster

Open Questions

• Are there special concerns when upgrading Galera cluster to MariaDB 10.5 or 10.6?

  I see on this page that there are no special instructions for upgrading a M...
• Data corruption on the secondary peer of a MariaDB-Galera cluster, while the main peer is OK, so how to recover?

  We have a Galera cluster of MariaDB databases, consisting of: galera-4.x86_...
• Down scaling Mariadb Cluster

  Hey, I have a hard time finding the documentation of down scaling a multi-m...
• Galera Cluster large differences in databases sizes on each server

  I'm not sure if this is intended or not (seems unlikley but I'm still new a...
• MariaDB Galera Cluster - docker - multiple nodes

  Can I run MariaDB Galera Cluster on multiple machines, each in docker conta...
• MariaDB Galera Cluster on PowerPC

  Has someone tried to use MariaDB Galera Cluster with PowerPC? If yes, does it behave well?
• 1

  MariaDB Galera Cluster Out of sync suddenly (Only sync the schema change but data not) Innodb engine

  Hi We are running a 3 (A,B,C) nodes mariadb galera cluster on productio...
• MariaDB Galera Cluster vs. MySQL NDB Cluster

  Has someone made a performance comparison between MariaDB Galera Cluster an...
• Read path and write path in MariaDB Galera Cluster

  Hi Everyone, I'm struggling to understand MariaDB Galera read and write pa...
• use events in galera cluster

  Hi, We are going to use the galera cluster. Moreover, I have created an eve...

Answered Questions

• 1

  Galera Cluster starting backup can't find innobackupex in the path

  I am trying to get a Galera cluster running. I have the first node up and ...
• 1

  Local state seqno out of sync with group

  We have MariaDB and Galera working in our lab on a three node cluster. Whe...
• 1

  Strange ssl messages in error log

  Hello, I'm getting these odd messages appearing in my error log since enabl...
• xtrabackup sync method

  Hello, have installed Maria on Centos 6.4 x86_64: MariaDB-common-5.5.31-1.x86_64 MariaDB-Ga
• 1

  Asynchronous Replication with Galera Cluster ?

  My question is simple. Today i have a Galera Cluster with 3 nodes to write/...
• 4

  Can't optimize database in cluster?

  I'm using a cluster of 3 MariaDB 10.1.10 servers on Ubuntu. The servers are...
• 5

  Cluster node sizes are different

  I have three node MariaDB Galera Cluster. At first the databases size in al...
• 2

  Cluster Overall Memory Requirements (compared to multiple stand-alone nodes)

  Maybe I'm just missing it somewhere on the site, but I'm trying to find a w...
• 2

  Does a Galera Cluster Node Serve During a Heavy Data Replication?

  To simplify the question, I want to ask that with a scenario. So I have a 3...
• 3

  Does MariaDB Galera Cluster 10.0.21 version support gmcast.segment?

  Hi, Server version: 10.0.21-MariaDB-wsrep-log MariaDB Server, wsrep_25.10....
• 1

  Error during Galera Server Installation

  When attempting to install MariaDB-Galera server and client I am receiving ...
• 1

  Fixes for MDEV-12837 & MDEV-15822

  Hello, This "WSREP: BF lock wait long for trx" bug is hitting us massively ...
• 2

  Galera Cluster expire_logs_days

  Is it safe to modify the "expire_logs_days" variable while the cluster is r...
• 2

  Galera cluster fail during dump or optimize

  I'm experiencing an issue with a MariaDB cluster when dumping or optimizing...
• 3

  Galera errors in mysqld.log but works OK

  I have a 3 node Galera cluster that I am testing. It generally works OK, an...
• 3

  Galera mysqld_multi - possible bug

  Not sure where to post this but I've come across this on a SLES 12 system. ...
• 1

  How to install MariaDB Galera without internet connection( without YUM)?

  Hi guys, I want to install a HA ( high availability ) environment without i...
• 1

  Instructions for moving from a Galera Cluster to a single node

  I am looking for information on how to convert a MariaDB Galera Cluster to ...
• 10

  MariaDB Galera

  Hi, Does free version of MariaDB Galera support active-active cluster topol...
• 1

  MariaDB Galera 10 stable?

  I am using MariaDB-Galera 10 on preprod & test environments and I haven't s...
• 1

  MariaDB Galera bootstrap

  Are there any references for a MariaDB Galera setup on a systemd system (SU...
• 1

  MariaDB Galera Cluster Questions

  I have some questions on Maria DB Galera Cluster. Q1) If I partition a tabl...
• 2

  MariaDB Server StandAlone to Galera Cluster

  Hi, I'm planning to have a Galera Cluster but for now I only have 1 Databas...
• 1

  Phenomenon of read-only queries performance

  We are evaluating Galera cluster with MariaDB and find out interesting phen...
• 1

  Request details about MariaDB Cluster behaviour in certain situations

  We are evaluating different database cluster solutions. We would like to ge...
• 3

  restrictions on EVENTs in Galera?

  Can EVENTs and TRIGGERs be used in Galera Cluster? If so, are there any restrictions?
• 1

  Simple cluster two nodes, error.

  Hi people, i have a two nodes cluster of MariaDb, and i need some help, i h...
• 3

  SST smethod: rsync_wan

  I'm looking for an option to make my SST faster. I tried using xtrabackup-v...
• 4

  start the first cluster node failed with libssl.so.6 problem

  Hi, All Mariadb galera Version: 10.0.21 OS: Redhat 6 : 2.6.32-504.23.4.el6...
• 2

  Stored Procedures & Functions on nodes in a Galera Cluster

  I am at the planning stage of a new Galera/MariaDB cluster. I can find very...
• 1

  Ubuntu vivid package missing virtual-mysql-server-core

  On ubuntu vivid, the current mariadb-galera-server-10.0 package does not pr...
• 1

  Which is the best solution to re-sync data if one of my mariadb servers was offline for few days?

  Hi all, In our system, we built only two Mariadb Galera servers. We use...