This post discusses how XtraDB Cluster and Ceph are a good match, and how their combination allows for faster SST and a smaller disk footprint.

My last post was an introduction to Red Hat’s Ceph. As interesting and useful as it was, it wasn’t a practical example. Like most of the readers, I learn about and see the possibilities of technologies by burning my fingers on them. This post dives into a real and novel Ceph use case: handling of the Percona XtraDB Cluster SST operation using Ceph snapshots.

If you are familiar with Percona XtraDB Cluster, you know that a full state snapshot transfer (SST) is required to provision a new cluster node. Similarly, SST can also be triggered when a cluster node happens to have a corrupted …

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“Complicated queries, like looking for second degree friends, is really hard to traditional databases.” –Dong Bin

I have interviewed Dong Bin, Engineer Manager at LinkedIn China. The LinkedIn China development team launched a new social platform — known as Chitu — to attract a meaningful segment of the Chinese professional networking market.

RVZ

Q1. What is your role at LinkedIn China?

Dong Bin: I am an Engineer Manager in charge of the backend services for Chitu. The backend includes all Chitu`s consumer based features, like feeds, chat, event, etc.

Q2. You recently launched a new social platform, called Chitu. Which segment of the …

The MySQL Document Store functionality allows developers to use a relation database with or without SQL (structured Query Language), also known as NoSQL. The example in this blog is hopefully a simple look at this new feature of MySQL. The example data used is from JSONStudio.com and is a JSON formatted data set for US zip (postal) codes (656K compressed). So download your copy of this data set and lets get to work.

Create a collectionCollections are tables and below we create a collection name 'zip' in the test database in the Python dialect.

mysqlsh -u root -p --py test
Creating an X Session to root@localhost:33060/test
Enter password:
Default schema `test` accessible through db.

Welcome to MySQL Shell 1.0.4 Development Preview

Copyright (c) 2016, Oracle and/or its affiliates. …

Welcome to this week’s Planets9s, covering all the latest resources and technologies we create around automation and management of open source database infrastructures.

The “DBMS” part of MySQL is fine – storage engines (especially with new kids on the block), replication, etc, but it really sucks at executing SQL.

I won’t even get into complex SQL that has complex data dependencies, will start with very basic tasks.

SELECT * FROM table WHERE indexed = "A" LIMIT 1

If multiple indexes can satisfy the query, MySQL will hit each of them at least twice – looking up first “A” and last “A” records. It will do that while planning the SQL execution. Once it comes up with a plan, it will go and hit the index it picked again, this time once. So, if you have two candidate indexes, you will have 5 index accesses at 4 positions.

How would a direct cursor access work? Single index hit. Want to simulate that in SQL? You can add a ‘FORCE INDEX’ hint, then only one …

In this post, I’ll review Docker multi-host network performance.

In a past post, I tested Docker network. The MySQL Server team provided their own results, which are in line with my observations.

For this set of tests, I wanted to focus more on Docker networking using multiple hosts. Mostly because when we set up a high availability (HA) environment (using Percona XtraDB Cluster, for example) the expectation is that instances are running on different hosts.

Another reason for this test is that Docker recently announced the 1.12 release, which supports Swarm Mode. Swarm Mode is quite interesting by …

FromDual has the pleasure to announce the release of the new version 0.10.6 of its popular Database Performance Monitor for MySQL, MariaDB, Galera Cluster and Percona Server fpmmm.

You can download fpmmm from here.

In the inconceivable case that you find a bug in fpmmm please report it to our Bug-tracker.

Any feedback, statements and testimonials are welcome as well! Please send them to feedback@fromdual.com.

This release contains various bug fixes and improvements. The previous release had some major bugs so we recommend to upgrade...

Changes in fpmmm v0.10.6

fpmmm agent

• Do not connect to …

Hi everyone, its been a while since the last release of Group Replication. During this period we have been working hard to improve the plugin and give you a better user experience. Focused on solving several existing bugs, address performance issues and improving user
experience we renamed some variables, introduced new ones and changed some of the plugin policies.…

Join us for the first part of our upcoming webinar trilogy on MySQL Query Tuning. Over the course of three in-depth webinar sessions led by Krzysztof Książek, Senior Support Engineer at Severalnines, we’ll cover SQL tuning, indexing, the MySQL optimizer and how to leverage EXPLAIN to gain insight into execution plans.

Tuning MySQL queries and indexes can significantly increase the performance of your application as well as decrease response times, when done right. This is why we’re covering this complex topic over the course of three webinars of 60 minutes each.

This first part of the trilogy focuses on the query tuning process and related tools. Building, collecting, analysing, tuning and testing will be discussed in detail as well as the main tools involved, tcpdump and pt-query-digest.

Date & Registration Part 1: Query tuning process and tools

Tuesday, August 30th

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