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MariaDB Galera Cluster is a synchronous multi-master cluster.

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query_cache_type on mysql galera cluster

I was wondering could I turn on the query_cache_type for mysql galera cluster of two nodes. The scenario is : 1. Proxysql infront of two master-master galera(mysql) nodes 2. Inserts are coming ...
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1answer
19 views

mysql_insert_id() on galera mysql cluster

I have percona mysql galera cluster. It inherited a MyISAM database. In order for the galera to work it had to alter to innodb. Replication is working so far so good. However I have a php application ...
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14 views

MariaDB Galera Cluster max_allowed_packet reset

We use a dockerized image for Galera Cluster, where initially I set the max_allowed_packet variable to 256m in the my.cnf file. This configuration is accepted by the database and validated by a later ...
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1answer
19 views

Mariadb 10.1 / Galera - bootstrap node always doesn't lose quorum

I'm using mariadb10.1.37, wsrep_provider_version 25.3.24(r3825). On my dev cluster (2node+1arbitrator) I found the following behaviour: node1: bootstrap new cluster (using galera_new_cluster, with pc....
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1answer
22 views

'kill <query id>' gives ERROR 1095 (HY000): You are not owner of thread … even though I am

I did an ALTER TABLE on a huge table on a MariaDB Galera Cluster 10.2, but after a while of waiting I changed my mind and tried to kill the connection. However, MariaDB said ERROR 1095 (HY000): You ...
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1answer
26 views

WSREP: Writeset deserialization failed: Unsupported RecordSet version: 2: 71 (Protocol error)

We are running a Mariadb galera cluster with 3 data nodes. Recently one of them crashed and I had to do a SST (State Snapshot Transfer). Nothing I haven't done or seen before. However, after the SST ...
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0answers
20 views

Stuck processes SHOW GLOBAL STATUS in MariaDB Galera cluster after writing data and reboot

There are 3 nodes in MariaDB Galera cluster running on 3 VMs, one per Vm. Some transactions were applied on one of the nodes, then one VM was rebooted. Automatic script starts mysqld process after VM ...
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1answer
21 views

MariaDB Galera Cluster - Cert Deps Distance issue

I have mariaDB Galera 10.2 Cluster running with 3 nodes; in google cloud VMs with 8 cpu ; 15Gigs Ram / node; My slave_thread setting = 24 ; currently there is no much write happening and ...
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1answer
23 views

MySQL PXC node failing to receive state

I have three nodes that I want to setup into a Percona XtraDB Cluster (PXC). I have bootstrapped the first node and joined the second node, but cannot somehow join the third node. All configuration is ...
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0answers
101 views

Error with GaleraCluster> [ERROR] WSREP: gcs / src / gcs_group.cpp: gcs_group_handle_join_msg (): 736: Will never receive state. Need to abort [closed]

I made a cluster with GaleraCluster using 3 virtual machines with Debian 9 and mariadb 10.1 database. The replication works well using rsync method, even if a node is dropped when it recovers, it ...
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2answers
28 views

Read after write in Galera

I am facing a issue with 3 node galera cluster where the read doesn't return any records even when the write has been commited. Below are the steps which can happen from multiple servers. 1>Server A ...
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31 views

A database with MyISAM tables on Galera cluster and perform an ALTER TABLE, will that change be replicated?

I've inherited a Galera cluster with DBs that are ENGINE = MyISAM. I know that by default, MyISAM tables are not replicated in Galera cluster. I'm not interested in "experimental support" within ...
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1answer
24 views

all gradestate.dat seqno: -1 why?

All my 3 nodes in mariadb galera cluster seqno is -1 and when i restart the whole cluster i need to start with --wsrep_new_cluster just to start the other nodes. can anyone help me with this? all 3 ...
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1answer
27 views

Enable GTID on one node in Percona/Galera

Im having 3 node percona cluster. (5.6) Server ID is enabled on each node but all are different IDs. Binlog and log slave updates are enabled. Now I want to enable GTID on the third node alone. I ...
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0answers
22 views

MariaDB Cluster Cannot Join new Node

This is status on Main node. it's show some seqno as 17210843 when new empty node is join. i'm found rsync process is ok. but i see difference seqno in linux process after finish this process my ...
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0answers
19 views

One node causing entire Galera Cluster to remain in bad state

I have a production MariaDB Galera 5 node cluster that has been running for about 8 months at our factory. One node had a powerfail / un-graceful shutdown (Ubuntu 16.04) and since then if that node is ...
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0answers
19 views

wsrep_provider_options added to galera config file but not shown in mariadb monitor

Today I was trying to setup ssl on my galera cluster, generated all needed keys and certificates and did everything included in related guide here: http://galeracluster.com/documentation-webpages/...
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0answers
150 views

Third node cannot join Galera cluster after mariadb update

I tried to deal with this issue for three days now, but unfortunately without success. I have a Galera cluster (Node1 - donor, Node2 - joiner, Node3 - arbitrator) which was working flawlessly until I ...
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0answers
28 views

Can't add new node to Galera Cluster

I have a 5 node Galera 3 Cluster running MySQL 5.6 on Ubuntu 16.04 (I tried running 5.7 but ran into the AppArmor issue). I'm trying to add another node to the cluster but it continually fails. The ...
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1answer
96 views

MariaDB Galera Cluster on Ubuntu 16.04 does not start after rebooting [closed]

I've installed a MariaDB Galera Cluster on Ubuntu 16.04 in 2 nodes. Here the info from node1: root@localhost:~# sudo more /etc/mysql/conf.d/galera.cnf [mysqld] binlog_format=ROW default-storage-...
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0answers
59 views

galera_new_cluster doesn't allocate start position, wsrep_connected doesn't turn on, no error logs, what should I do?

I've tried so many different configurations suggested by various website on my MariaDB Galera nodes, yet no success. :( I should see something like: wsrep_start_position=00000000-0000-0000-0000-...
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0answers
68 views

MariaDB Galera Cluster node fail to start after stopping

I try to use Galera Cluster for my mariaDB as failover and backup but i got this error when i started to connect the other node to main node. mysql.service - LSB: start and stop MySQL Loaded: ...
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0answers
47 views

galera wsrep_cluster_address value

I am trying to deploy galera multimaster replication but faced some problems, google does not solve it it seems, but I see some people had the same problems in the past. Say, I have 3 servers 192....
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1answer
43 views

A minimum of a 3 Node Galera Cluster is Recommended, but is it better to have 5 nodes?

Right now I have a 400GB database, with a 5 node Galera Cluster. They are all RAID 10 SSDs. I've read the following: If the node goes missing due to a network problem or otherwise leaves without ...
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1answer
76 views

what is MDL? (e.g. 'MDL semantics' or 'MDL locks') Probably Galera related

I found a guy talking about MDL semantics in a Galera/XtraDB bug report. What is MDL? The term MDL also in Galera logs MDL conflict. Please explain in detail. 2018-06-14 17:07:10 140112699321088 [...
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0answers
58 views

MariaDB galera cluster with Mroonga in wrapper mode doesn't synch

MariaDB Galera Cluster states that the storage engine needs to be InnoDB. I am using Mroonga on some tables in wrapper mode {which uses InnoDB under the hood as storage engine}. The problem I am ...
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1answer
564 views

InnoDB: Error: log sequence number is in the future!

Hi I have 2 node cluster where recently went offline not sure why. Node1 started fine and all the traffic is on node 1 but node 2 still down due to below error. I tried set the inodb recovery to 3 and ...
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0answers
357 views

Galera Cluster Failed to report last committed

I'm experimenting with Galera Cluster with 3 nodes, but I'm having some issues but I'm not sure why. What I noticed is that I'm having lots of failed to report last committed (number), -110 (...
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1answer
98 views

mariadb, add 4th galera node failed

I have three nodes setup and running perfectly for the past months. Recently I want to add another node in a different location but somehow I keep on getting errors. At first, I was just following ...
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1answer
81 views

Mariadb Galera cluster empty set

I am playing around with a MariaDB Galera Master Master Cluster and I have some issues which I do not understand. [mysqld] bind-address=0.0.0.0 [galera] wsrep_on=ON wsrep_provider=/usr/lib64/galera/...
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1answer
415 views

Node 3 can't connect in galera cluster

I have a cluster of mariadb 10.2.14 galera. We use amazon ec2 machine, with external drive for data and log for mariadb. My galera cluster is working correct with 2 node. But i get this error when ...
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1answer
337 views

Using xtrabackup-v2 as SST method in MariaDB Galera cluster

I have configured mariadb galera cluster as docker swarm service using official docker image: during cluster startup rsync (default SST method) works fine. Wanted to change it to xtrabackup or ...
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2answers
148 views

MySQL XtraDB/Galera Cluster High Availability RamDisk *SuperFast*

Ok, So this is going to be a speculative question, mostly design oriented and a rather long one. I'd grab a cuppa' covfefe, if I were you. Preface: So I have been researching into databases and ...
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2answers
135 views

Percona XtraDb cluster auto increment

Help me please clarify a very important question on which I can't find the answer. It only can be proven with tests. Let's say we have XtraDB Cluster (or Galera Cluster) with three nodes. We have ...
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1answer
42 views

does the gcache.size matter during SST? What if more than gcache.size comes in during SST?

During SST my data dir looks like this (there is a hidden dir .sst with xtrabackup): -rw-rw---- 1 vcap vcap 113 Apr 16 08:13 grastate.dat -rw-rw---- 1 vcap vcap 265 Apr 16 08:13 gvwstate....
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2answers
180 views

MySQL Galera Cluster mass update delay

I have migrated my single MariaDB setup to a 3 node Galera cluster. I am currently in staging and most of normal operations run fine. I have one issue though: if I do a mass update of one column of ...
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1answer
113 views

Galera not working with Replication

I am using MariaDB 10.2 I have node2 (2.2.2.2) running as a slave to some external database. I bootstrapped node2 as the first member of a Galera cluster "my_cluster". Node1 (1.1.1.1) joined with ...
2
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1answer
308 views

Galera SST fails

I am using MariaDB 10.2 I have node2 (2.2.2.2) running as a slave to some external database. I bootstrapped node2 as the first member of a Galera cluster "my_cluster" When I try to join node1 (1.1.1....
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1answer
489 views

SST not starting on a new node on MariaDB Galera Cluster

I have two MariaDB servers I want to use to create a new MariaDB Galera Cluster: Server mysql1, with some data and configured as a donor Server mysql2, with no data and /var/lib/mysql empty, which I ...
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1answer
104 views

Setup replication between two Galera nodes

I've been using MariaDB 10.2 Galera with 3 nodes successfully on local servers. Now, I have a second 3-nodes Galera cluster on another location, joined by an Site-to-Site IPSec Tunnel. I can't really ...
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0answers
34 views

Creating galera cluster from mysql-5.6 server

There's production server, running Mysql-5.6.30 under Debian. Database about ~120GB. I want to create Galera cluster. Do I need to re-install MySQL with WSRep pathces, or I can simply add needed ...
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2answers
223 views

why I see only COMMIT or commit in SHOW FULL PROCESSLIST - No SQL statement

I see in lots of output from SHOW FULL PROCESSLIST only COMMIT or commit (lowercase and upercase mix). What are those transactions? Why no SQL statement? We are running MariaDB 10.1.x and Galera ...
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1answer
142 views

Can sst_state_transfer be set to rsync with innodb as storage engine in Galera cluster?

Galera cluster wsrep-sst-method docs states: You can only use rsync when anode is starting. You cannot use it with a running InnoDB storage engine. I do have InnoDB storage engine configured in ...
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1answer
43 views

I can't add extra node after reset root password mariadb 10.1.20

I have a mariadb 10.1.20 cluster with 5 nodes. I don't know root password so I did the following steps: On second node, I stopped mysql service I set wsrep = OFF on /etc/my.cnf.d/server.cnf I ...
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0answers
32 views

Connect to a MariaDB database cluster from a clinet on a different subnet

I have three servers where each one of them has two Ethernet interfaces namely eth0 and eth1. I have set up MariaDB server galera cluster with three servers with IPv4 addresses 192.168.1.100, 192.168....
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1answer
297 views

MySQL Galera cluster can't initiate first node

I'm using Ubuntu 16.04 and installed MySQL version 5.7 via apt-get in AWS. After that, I've managed to upgrade the MySQL to Galera Cluster by following the Documentation from the official website ...
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1answer
187 views

Galera Failures

I have 2 nodes. One a VPS on NFO Servers and another on Azure. I have setup the firewalls/disabled the firewalls. The nodes are CentOS 7, Latest Kernel. The configs are as follows: Node 1 (Master DB) ...
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2answers
5k views

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 “No such file or directory”) when configuring cluster

I have 3 MariaDB nodes. Want to configure cluster. Specified in gcomm:// in my.cnf ips of all members in cluster according to this. And added ?pc.wait_prim=no at then of gcomm://ip1,ip2,ip3 Then ...
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195 views

re-sync between master and slave (galera)

Mysql Server-1,Server-2,Server-3 is running as Galera and server-2 is slave. Mysql Server-4 is master. my.cnf file master side is : [MYSQLD] binlog-format=ROW log-bin=binlog server-id=1 and also ...
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0answers
45 views

Debugging Galera TX conflicts when no SQL is logged

I'm trying to debug an intermittent transaction conflicts in my cluster. With the debug output enabled, I'm getting following logged: *** Priority TRANSACTION: TRANSACTION 1691804310, ACTIVE 0 sec ...