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Questions tagged [galera]

MariaDB Galera Cluster is a synchronous multi-master cluster.

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1answer
22 views

Galera cluster node fails with error. Brand new cluster + master / node. Access denied or can't connect

I am having issue. Previous cluster fatally crashed, so I've created a new one with pretty much same settings (changed cluster name only). Here is a galera.cnf for a node: [mysqld] binlog_format=...
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1answer
16 views

Xtrabackup corrupt incremental backup

I have 3 nodes PXC 5.6 cluster. Xtrabackup 2.3.10. Centos 7.6 Percona-XtraDB-Cluster-56-5.6.41-28.28.1.el7.x86_64 I am using only single Node-1 for both read and write. And I use to take backup ...
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5answers
87 views

Managing mariadb database performance with very large tables

I have a joomla-3.9 and apache-2.4.34 system on fedora29 with mariadb-10.2.19 and the tables that contain the search content are very large. Several are larger than 1.2GB and one is larger than 5.5GB. ...
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1answer
23 views

MariaDB Galera Cluster - first node won't reconnect after restart… Ever

Firewalls disabled, replication worked fine, IP's accessible.. All config copied from here: https://www.digitalocean.com/community/tutorials/how-to-configure-a-galera-cluster-with-mysql-5-6-on-ubuntu-...
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2answers
37 views

Safe backup of PXC / Galera cluster

I have 3 nodes 'master master' cluster and using PXC 5.6 But I am only using a single node for both read and write. Before using pxc, i was using standalone Mariadb 5.5 and I was taking backup using ...
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1answer
14 views

Convert MyISAM to InnoDB in PXC master master

I have 3 nodes PXC 5.6 master master cluster. I have few tables that are using MyISAM. Total MyISAM table = 120 Total MyISAM table size = 80MB I have also read few recommendations where it suggests ...
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2answers
27 views

Do VIEWS need a primary key in Galera?

We have a MariaDB Galera Setup, so do we require primary keys in a MySQL view? It contains a complex select query with joins of tables and the values get updated. so do they replicate in a Galera DB ...
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1answer
9 views

Character set warning in PXC logs

I am using PXC 5.6 (Percona-XtraDB-Cluster-56-5.6.41-28.28.1.el7.x86_64) and my log file is flooded with this warning: [Warning] Client failed to provide its character set. 'latin1' will be used ...
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1answer
29 views

Auto increment gap in percona xtradb cluster master master setup

I was using mariadb 5.5 before but now I have upgraded it and using percona xtradb cluster 5.6 I have 3 nodes cluster. I am only using single node for read and write. I saw some increment gaps in ...
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0answers
7 views

Galera Replicaiton speed test?

I have 3 node galera setups. Here I am implementing Read Write splits where all the writes will be directed to one node and reads from all the three nodes. So here my concern is , how fast records ...
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0answers
30 views

Percona Xtradb Cluster not accepting options on command line

I am using Percona Xtradb Cluster 5.6 and trying to start my cluster through a donor node via command line and I am getting this error: CentOS 7: systemctl start mysql --wsrep-sst-donor=srv1 ...
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0answers
38 views

Percona XtraDB Cluster 5.6 commit slow

I'm running Percona-XtraDB-Cluster-server-56 with Version : 5.6.39 Release : 26.25.1.el6. with 2 node PXC + 1 Garbd monitor. Sometime commit command is slow, it affect to all commit command at that ...
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0answers
42 views

Galera - single database backup & restore

I have a MariaDB Galera cluster. One of its nodes is dedicated for the backups (pc.weight=0 and the MaxScale SQL proxy doesn't know it exists). I'm using mariabackup --backup --galera-info --target-...
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1answer
25 views

Missing wsrep variables in mysql / percona / galera cluster

I set up a small mysql/percona/galera cluster using the percona cluster docker image, with 3 nodes. I followed the documentation written here After starting up the whole cluster, I'm missing some of ...
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1answer
59 views

InnoDB Buffer causing a lot of deadlocks and connection/client timeouts

I have a PXC cluster (5.7) with three nodes running on CentOS 7 VMs, each with the following system info: mysql_db# free total used free shared buff/cache ...
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1answer
23 views

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
23 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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0answers
28 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
27 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
81 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
77 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
49 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
33 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
46 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
209 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
36 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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1answer
35 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
49 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
28 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
28 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
191 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
33 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
126 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
88 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
59 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
45 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
121 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
67 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
635 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
492 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
134 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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vote
1answer
108 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
699 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
438 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
176 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
167 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 ...
1
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1answer
57 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
266 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 ...
2
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1answer
182 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 ...
3
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1answer
472 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....