On March 22, 2018, we held a webinar on how Percona XtraDB cluster 5.7 (PXC) and ProxySQL can help achieve your database clustering high availability needs. Firstly, thanks to all the attendees for taking time to attend the webinar and we are sure you had a webinar experience. We tried answering some of your high availability questions during the call but due to time restrictions if we missed some of the questions then this blog will help clarify them.

Q. You say the replication to servers is virtually synchronous, if there is any latency, does ProxySQL detect this and select a node accordingly?

A. PXC nodes are …

Recently I worked on one customer issue that I would describe as “slave performance too slow”. During a quick analysis, I’ve found that the replication slave SQL thread cannot keep up while processing row-based events from the master’s binary log.

For example:

mysql> SHOW SLAVE STATUSG
*************************** 1. row ***************************
                          ...
              Master_Log_File: binlog.0000185
          Read_Master_Log_Pos: 86698585
                          ...
        Relay_Master_Log_File: binlog.0000185
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
                          ...
          Exec_Master_Log_Pos: 380
              Relay_Log_Space: 85699128
                          ...
                  Master_UUID: …

MySQL Document Store

In MySQL 8.0 a new stack of components is introduced, turning MySQL to a competitive Document Store solution.

The MySQL Document Store takes advantage of existing capabilities including:

• Efficient and safe data management from the InnoDB storage engine
• ACID compliance and Transactional Operations
• High Availability with Group Replication and InnoDB cluster

One of the most attractive components introduced in MySQL 8.0 is a development API (DevAPI) that enables you to create JSON document based applications through a fluent API.…

The MariaDB Foundation is pleased to announce the availability of MariaDB 10.0.35, MariaDB Galera Cluster 5.5.60 as well as MariaDB Connector/C 3.0.4, all stable releases. See the release notes and changelogs for details. Download MariaDB 10.0.35 Release Notes Changelog What is MariaDB 10.0? MariaDB APT and YUM Repository Configuration Generator Download MariaDB Galera Cluster 5.5.60 […]

The post MariaDB 10.0.35, MariaDB Galera Cluster 5.5.60 and MariaDB Connector C 3.0.4 now available appeared first on MariaDB.org.

Any software system requires secrets to run, be it credentials to communicate with databases, tokens to access resources, or encryption keys that need to be distributed. Secrets management means to deal with all kinds of secrets in a structured and secure way. In this blog entry we will show how to use Hashicorp Vault to […]

MySQL 8.0 has many new GIS features, including a catalog of spatial reference systems (SRSs) and support for geographic (latitude-longitude) computations.

In a Cartesian SRS, it doesn’t really matter which coordinate is on which axis. The axes are orthogonal and the units are the same on both axes, so if a user consistently puts the X value in the Y coordinate and the Y value in the X coordinate, it doesn’t affect computations (in the functions MySQL currently supports).…

In this blog post, I’m going to revisit the ProxySQL Query Rewrite feature. You may have seen me talking about possible use case scenarios in the past few conferences, but the reason I’m starting with this is that query rewriting was the original intention for building ProxySQL.

Why would you need to rewrite a query?

• You’ve identified a query that’s causing bottleneck or slowness
• A special operation requires query routing
• You cannot modify application code

So here we have a case of a bad query hitting the backend database. You as a DBA have identified the query as causing severe slowdown, which could lead to a site-wide outage. This query needs to be optimized, and you have asked the developer …

Someone accidently deleted part of the database. Someone forgot to include a WHERE clause in a DELETE query, or they dropped the wrong table. Things like that may and will happen, it is inevitable and human. But the impact can be disastrous. What can you do to guard yourself against such situations, and how can you recover your data? In this blog post, we will cover some of the most typical cases of the data loss, and how you can prepare yourself so you can recover from them.

Preparations

There are things you should do in order to ensure a smooth recovery. Let’s go through them. Please keep in mind that it’s not “pick one” situation - ideally you will implement all of the measures we are going to discuss below.

Backup

You have to have a backup, there is no getting away from it. You should have your backup files tested - unless you test your backups, you cannot be sure if they are any good and if you will …

MySQL 8.0.11 comes with a catalog of 5108 spatial reference systems (SRSs): 4628 projections (flat maps), 479 geographic (ellipsoidal) representations of Earth, and one Cartesian all-purpose abstract plane (SRID 0).

Projections

Projected SRSs are Cartesian planes, just like SRID 0.…

Earlier this year, I was presented with the challenge of streamlining user access to MySQL, allowing users self-serve access using their LDAP credentials, while logging all access. Of course, various MySQL forks allow for user auditing, but the solution is also needed to eventually support other data storage systems without native user auditing. This gave me the opportunity to do a trial integration of MySQL, Vault, ProxySQL, and LDAP; Vault would be used to dynamically create user accounts, and ProxySQL would be used to limit access and log activity. To evaluate the functionality and configuration of the integration, I used Docker to set up a test environment.

Below I will present the methods used to:

1. Provision the Docker environment.
2. Configure OpenLDAP. …