Por si no se hubiera visto o promocionado lo suficiente, quería compartir la lista de webcasts en Español que ya hay disponible en On Demand webinars en el apartado de News & Events en mysql.com:

https://www.mysql.com/news-and-events/on-demand-webinars/#es-20-0

Sobre 1 hora de duración cada una, aquí tenéis algunos ejemplos:

MySQL InnoDB Cluster: Una introducción y Demo

MySQL, NoSQL, JSON, JS, Python: Document Store. (+demo)

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Ok, so if you’re reading this, then I can guess you’ve got a MySQL InnoDB Cluster in an awkard shape, i.e. you need to restore a backup and add the instance back into the cluster, so we have all our instances again.

As it might be logical to think “ah, but I’ve only lost 1 instance, a read-only instance, so all I have to do is backup & restore the other read-only instance and I’m home free. Well I want to make it a little harder. So in this scenario, assume that we’ve lost both the READ-ONLY instances, so I need to backup my primary READ-WRITE instance.

I’ve got a 8.0.16 instance, on Oracle Linux 7.4. We’ll be looking at 2 hosts, ic1 & ic3.

We’ll be using the MySQL Enterprise Edition Server, that bundles MySQL Enterprise Backup with the rpm’s so we don’t need to install anything else.

I’ll assume you’ve got access to Oracle …

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Today is World Backup Day, so I thought I would use the opportunity to discuss some best practices and general considerations regarding backing up MySQL instances. While I focus on MySQL, several of these tips apply to backups in general.

Backup your data

Before heading into the gory details, let’s first take a look at the best practices at a high level:

• Make sure you can restore your backups:
  • Document and script the restore procedures. Do you know the steps required to restore a full backup – or a single table?
  • Keep copies of the backups off-site. Do you have a copy of your backup if the data center becomes unavailable for example due to a fire?
  • Validate your …

You say you want a Replication?

One of the best features of MySQL is the ability to use MySQL‘s built-in database replication feature to automatically replicate data from one server (source/master) to another (slave/replica). Group Replication was added in MySQL 5.7 as a way to provide a high-availability solution using a new variation of MySQL replication.

(In some earlier posts, I explained how to setup Group Replication using three MySQL database servers and how to …

So, if we’re applying GDPR to our system, and we’re already making use of MySQL Transparent Data Encryption / keyring, then here’s an example on how to migrate from filed-based keyring to the encrypted keyring. Online.

If you’re looking to go deeper into the TDE then I suggest reading the MySQL Server Team’s InnoDB Transparent Tablespace Encryption blog.

You’d already have your environment running, whereas I have to create one.. give me a minute please, 8.0.12 here we come:

mysqld --defaults-file=my_okv.cnf --initialize-insecure --user=khollman
mysqld --defaults-file=my_okv.cnf --user=khollman &

mysql …

With MySQL version 5.7.11 and up, Oracle continues to improve MySQL’s security features by adding MySQL Enterprise Transparent Data Encryption (TDE) for InnoDB tables stored in innodb_file_per_table tablespaces. This feature provides at-rest encryption for physical tablespace data files.

MySQL Enterprise TDE uses a two-tier encryption key architecture, consisting of a master encryption key and tablespace keys. When an InnoDB table is encrypted, a tablespace key is encrypted with the master key and the encrypted value of the tablespace key is stored in the tablespace header. When encrypting tablespace data, InnoDB transparently uses the master encryption key …

Ok, so now we’re got our InnoDB Cluster a-clustering, MySQL Router a-routing, now we need some disaster to be a-disaster-recovering…

A foreword first.

If you’re looking to use Enterprise Backup to recover a single node and restore that node back into an existing InnoDB Cluster, LeFred takes you through that one nicely here.

Preparing for backup

On our single primary server, the one that allows write, which was ic2/10.0.0.12 in my case:

mysql -uroot -poracle << EOF 
SET sql_log_bin = OFF; 
 create user 'backup'@'%' identified by 'oracle';
 grant all on *.* to 'backup'@'%';
SET sql_log_bin = ON; 
EOF

Let’s create something to backup (if you haven’t already done so of course):

mysqlsh --uri …

Want to setup InnoDB Cluster and be prepared for a Disaster Recovery scenario? Get ready:

Here’s a way to set up InnoDB Cluster using the 3 environments, on Oracle Linux 7.2, 5.7.19 MySQL Commercial Server, MySQL Shell 8.0.3 DMR, MySQL Router. As this is the first blog post for a complete disaster recovery scenario of InnoDB Cluster, we’ll also be installing MySQL Enterprise Backup.

If you’re new to InnoDB Cluster then I’d highly recommend looking at the following to understand how it works and what Group Replication, Shell & Router are.:

• https://dev.mysql.com/doc/refman/5.7/en/mysql-innodb-cluster-production-deployment.html
• …

Most users of MySQL utilize the mysqldump utility to backup their database. While mysqldump is handy and easy-to-use (and free), if you have data which is important to your business, then you should take a look at the MySQL Enterprise Edition – and use MySQL Enterprise Backup instead. The MySQL Enterprise Backup allows you to backup your database without the table locking you get with mysqldump. And, it is extremely fast – especially when you have to restore your database. Here is a sample speed comparison between MySQL Enterprise Backup and …

Today I encountered a situation where MySQL Enterprise Backup caused to much load on the I/O subsystem of the server to cause the application to be so slow that it wasn't usable any longer. So I wanted to limit the mysqlbackup process so it wouldn't cause any more issues.

The mysqlbackup command has settings to for the number of read, write and process threads. The defaults are 1 read, 1 write and 6 process threads. So that isn't really useful for throttling as I was using the defaults.

Using the ionice utility wouldn't work as that requires the CFG I/O scheduler.

I found a solution in this blog post. It is to use cgroups on Linux. I had used cgroups before to test how a galera setup works when one of the three servers had a much slower CPU.

# mkdir /cgroup/blkio
# mount -t …