Johan
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HAProxy Troubleshooting
Installation HAProxy version / config problems (if you have haproxy version <1.4.8: If you see the following when running ./install-haproxy.sh .. : <hostname>: Executing '/usr/sbin/haproxy -f /et...
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Node not connected to NDB
If you in the CMON web interface see "Node not connect to NDB!" there are a couple of things to check: Do you have ndbcluster and ndb_connectstring set in the my.cnf file?If not, add the above and...
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Upgrade from MySQL 5.5.20 wsrep 23.4 to MySQL 5.5.23 wsrep 23.5
This is applies to Commercial users only: Download the New Version Go to https://launchpad.net/galera/2.x/23.2.0 Debian/Ubuntu users should download: https://launchpad.net/codership-mysql/5.5/5.5....
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Upgrade from Galera 1.1.0 to 2.0.0
This article describes how to upgrade (online) from Galera 1.1.0 to 2.0.0. Rolling restarts is only supported in the Commercial Version. Pre-requisite: Upgrade to cmon 1.1.24 Avoid upgrading durin...
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Separating Data nodes over WAN
Albeit possible (new timeout handling was introduced in 7.2 to support separating data nodes within one cluster over geographical distance), it is nothing we recommend unless there is close to LAN ...
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Uploading and installing schema files on MySQL Cluster
You can use ClusterControl to upload and stage your MySQL Cluster with data. We recommend that you have the following: Ensure that all you CREATE TABLE ... use ENGINE=ndbcluster; (or that no e...
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Main differences compared to Innodb and MyISAM
In this article we discuss a few of the most common misconceptions with MySQL Cluster and differences compared to Innodb and MyISAM. 1. Deleting / Updating many records fails - out of MaxNoOfLocal...
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MySQL Cluster Self Training
Click on the link for Self Training on MySQL Cluster.