We are just starting to get into the swing of setting up our new training and webinar schedule. Initially, there will be one Webinar session (typically on a Wednesday) and one training session (on a Tuesday) every week from now. We’ll be covering a variety of different topics at each. Typically our webinars will be about products and features, comparisons to other products, mixed in with product news (new releases, new features) and individual sessions based on what is going on at Continuent and the market in general. Our training, by comparison, is going to be a hands-on, step-by-step sequence covering all of the different areas of our product. So we’ll cover everything from the basics of how the products work, how to deploy them, typical functionality (switching, start/stop, etc), and troubleshooting. All of the sessions are going to be recorded and we’ll produce a suitable archive page so that you can go and view the past sessions. Need a …

Sharing keys, passphrases with applications is problematic, especially with regard to encrypting data. Too often applications are developed where “the keys are left in the door” or at best “under the mat” – hard coded, in a clear text property file… exposed and vulnerable. …

This is the late blog post about 2 recent bug reports
#85969
#85971

The basic idea came after reading -> http://mysqlserverteam.com/the-mysql-8-0-1-milestone-release-is-available/

So the result of test ->
After each restart of MySQL the new undo log files are going to be created + keeping old files.

shahriyar.rzaev@qaserver-06:~/sandboxes/msb_8_0_1/data$ du -hs
6.4G    
# The count of undo files
shahriyar.rzaev@qaserver-06:~/sandboxes/msb_8_0_1/data$ ls | grep undo | wc -l
539

After new restart:

# New count
shahriyar.rzaev@qaserver-06:~/sandboxes/msb_8_0_1/data$ ls | grep undo | wc -l
616

So how to …

If you look into the key elements of replication, then the very basic element is Binary log or binlog. Over the period of time we have made efforts to improve the management of this quintessential element of replication. To keep up with our raising standards and requirements coming from the global MySQL community we have introduced two new features to help you manage your binary logs more efficiently.…

With the introduction of MySQL InnoDB Cluster we also got the MySQL Shell (mysqlsh) interface. The shell offers scripting in Javascript (default), SQL or Python. This offers a lot more options for writing scripts on MySQL, for example it is much easier now to use multiple server connections in a single script.
A customer recently asked for a way to compare the transaction sets between servers. That is useful when setting up replication or identifying the server that has most transactions applied already. So I wrote this little script which can be executed from the OS shell:

 #!/usr/bin/mysqlsh -f  
 // it is important to connect to the X protocol port,  
 // usually it is the traditional port + "0"  
 //  
 var serverA="root:root@localhost:40010"  
 var serverB="root:root@localhost:50010"  
 shell.connect(serverA)  
 var gtidA=session.sql("SELECT @@global.gtid_executed").execute().fetchOne()[0]  
 shell.connect(serverB) …

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.1.24, and MariaDB Connector/C 2.3.3. See the release notes and changelogs for details. Download MariaDB 10.1.24 Release Notes Changelog What is MariaDB 10.1? MariaDB APT and YUM Repository Configuration Generator Download MariaDB Connector/C 2.3.3 Release Notes Changelog About MariaDB Connector/C Thanks, and enjoy […]

The post MariaDB 10.1.24 and Connector/C 2.3.3 now available appeared first on MariaDB.org.

In this blog post, we’ll look at how Percona XtraDB Cluster maintenance mode uses ProxySQL to take cluster nodes offline without impacting workloads.

Percona XtraDB Cluster Maintenance Mode

Since Percona XtraDB Cluster offers a high availability solution, it must consider a data flow where a cluster node gets taken down for maintenance (through isolation from a cluster or complete shutdown).

Percona XtraDB Cluster facilitated this by introducing a maintenance mode. Percona XtraDB Cluster maintenance mode reduces the number of abrupt workload failures if a node is taken down using ProxySQL (as a load balancer).

The central idea is delaying the core node action …

MySQL InnoDB Cluster (or only Group Replication) becomes more and more popular. This solution doesn’t attract only experts anymore. On social medias, forums and other discussions, people are asking me what it the best way to migrate a running environment using traditional asynchronous replication [Master -> Slave(s)] to InnoDB Cluster.

The following procedure is what I’m actually recommending. These steps have for objective to reduce the downtime to the minimum for the database service.

We can divide the procedure in 9 steps:

1. the current situation
2. preparing the future cluster
3. data transfert
4. replication from current system
5. creation of the cluster with a single instance
6. adding instances to the cluster
7. configure the router
8. test phase
9. pointing the application to the new solution

…

Hello again everybody.

Well, I promised it a couple of weeks ago, and I’m sorry it has been so long (I’ve been working on other fun stuff in addition to this). But I’m pleased to say that we now have a fully working applier that takes data from an incoming THL stream, whether that is Oracle or MySQL, and converts that into a JSON document and message for distribution over a Kafka topic.

Currently, the configuration is organised with the following parameters:

• The topic name is set according to the incoming schema and table. You can optionally add a prefix. So, for example, if you have a table ‘invoices’ in the schema ‘sales’, your Kafka topic will be sales_invoices, or if you’ve added a prefix, ‘myprefix_schema_table’.
• Data is marshalled into a JSON document as part of the message, and the structure is to have a bunch of metadata and then an embedded record. You’ll see an …

Hello again everybody.

Well, I promised it a couple of weeks ago, and I’m sorry it has been so long (I’ve been working on other fun stuff in addition to this). But I’m pleased to say that we now have a fully working applier that takes data from an incoming THL stream, whether that is Oracle or MySQL, and converts that into a JSON document and message for distribution over a Kafka topic.

Currently, the configuration is organised with the following parameters:

• The topic name is set according to the incoming schema and table. You can optionally add a prefix. So, for example, if you have a table ‘invoices’ in the schema ‘sales’, your Kafka topic will be sales_invoices, or if you’ve added a prefix, ‘myprefix_schema_table’.
• Data is marshalled into a JSON document as part of the message, and the structure is to have a bunch of metadata and then an embedded record. You’ll see an …