The backup and restore of a complete database is an extensive exercise. But what if you need to restore just one table which has been mistakenly modified by an incorrect query? Help is at hand with Percona XtraBackup.

For our purpose, we will take a test database having tables created by the sysbench tool. The 8.0 versions of Percona XtraBackup and Percona Server for MySQL have been used in this test.

Restore Single Table

Here we will take the backup of the sbtest2 table and restore it. The initial checksum of the table is given below:

8.0.19>CHECKSUM TABLE sbtest2;
+--------------+-----------+
| Table        | Checksum | …

The importance of having periodic backups is a given in Database life. There are different flavors: binary ones (Percona XtraBackup), binlog backups, disk snapshots (lvm, ebs, etc) and the classic ones: logical backups, the ones that you can take with tools like mysqldump, mydumper, or mysqlpump. Each of them with a specific purpose, MTTRs, retention policies, etc.

Another given is the fact that taking backups can be a very slow task as soon as your datadir grows: more data stored, more data to read and backup. But also, another fact is that not only does data grow but also the amount of MySQL instances available in your environment increases (usually). So, why not take advantage of more MySQL instances to take logical backups in an attempt to make this operation faster?

Distributed Backups (or Using all the Slaves Available)

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If you want to back up your table and views, stored procedures, or stored function definitions, you can use mysqldump or mysqlpump to export the schema without the data. However, if you just want the views you need to look for another option. This blog shows how MySQL Shell comes to the rescue.

Backup the view definition using MySQL Shell

There are a couple of approaches to get the view definitions. One option is to consider the information_schema.VIEWS view which has the following columns:

mysql> SELECT COLUMN_NAME AS Field, COLUMN_TYPE AS Type
         FROM information_schema.COLUMNS
        WHERE TABLE_SCHEMA = 'information_schema'
              AND TABLE_NAME = 'VIEWS'
        ORDER BY ORDINAL_POSITION; …

In a MySQL 5.7 master-slave setup that uses the default semisynchronous replication setting for rpl_semi_sync_master_wait_point, a crash of the master and failover to the slave is considered to be lossless. However, when the crashed master comes back, you may find that it has transactions that are not present in the current master (which was previously a slave). This behavior may be puzzling, given that semisynchronous replication is supposed to be lossless, but this is actually an expected behavior in MySQL. Why exactly this happens is explained in full detail in the …

In my previous blog, I have explained how the MySQL clone plugin works internally. In this blog, I am going to do a comparison of  Backup and Recovery speed of MySQL clone plugin with other available mysql open source backup tools.

Below tools are used for speed comparison of Backup and Recovery,

1. Clone-Plugin
2. Xtrabackup
3. mysqldump
4. mydumper with myloader
5. mysqlpump

Test …

I miss a proper database related newsletter for busy people. There’s so much happening in the space, from tech, to licensing, and even usage. Anyway, quick tab sweep.

Paul Vallée (of Pythian fame) has been working on Tehama for sometime, and now he gets to do it full time as a PE firm, bought control of Pythian’s services business. Pythian has more than 350 employees, and 250 customers, and raised capital before. More at Ottawa’s Pythian spins out software platform Tehama.

Database leaks data on most of Ecuador’s citizens, including 6.7 million children – ElasticSearch.

Percona has …

We have been working with PMM for quite a long time, we do most of the performance analysis with PMM for most of our clients. It also provides the flexibility that we have built our own custom dashboard. PMM has many advantages

• Easy to deploy (docker based)
• Flexible
• Customizable
• Query Analytics
• One-stop solution for MySQL,Mongo,ProxySQL & PostgresSQL
• Orchestrator
• Rich and Deep metrics stats

Highly recommended for any production deployments its equivalent to Enterprise-grade monitoring and graphing tool.

Recently we have been working for our client on MySQL Consulting to scale peak sale of the year. Wherein we have deployed PMM to view the performance …

Percona is glad to announce the release of Percona XtraBackup 8.0.7 on August 7, 2019. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, it …

Percona is glad to announce the release of Percona XtraBackup 2.4.15 on July 10, 2019. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, it …

Are you looking to get started with the world’s most popular open-source database, and wondering how you should setup your MySQL hosting? So many default to Amazon RDS, when MySQL performs exceptionally well on Azure Cloud. While Microsoft Azure does offer a managed solution, Azure Database, the solution has some major limitations you should know about before migrating your MySQL deployments. In this post, we outline the best way to host MySQL on Azure, including managed solutions, instance types, high availability replication, backup, and disk types to use to optimize your cloud database performance.

MySQL DBaaS vs. Self-Managed MySQL

The first thing to consider when weighing between self-management and a MySQL Database-as-a-Service …