The latest from the MySQL community

In the MySQL world, we’re used to playing in the MySQL Sandbox. It allows us to deploy a testing replication environment in seconds, without a great deal of effort or navigating multiple virtual machines. It is a tool that we couldn’t live without in Support.

In this post I am going to walk through the different ways we have to deploy a MongoDB replica/sharding set test in a similar way. It is important to mention that this is not intended for production, but to be used for troubleshooting, learning or just playing around with replication.

Replica Set regression test’s diagnostic commands

MongoDB includes a .js that allows us to deploy a replication set from the MongoDB’s shell. Just run the following:

# mongo --nodb …

Percona invites you to attend a webinar Wednesday, January 27th, with CEO Peter Zaitsev: Compression In Open Source Databases. Register now!

Data growth has been tremendous in the last decade and shows no signs of stopping. To deal with this trend database technologies have implemented a number of approaches, and data compression is by far the most common and important. Compression in open source databases is complicated, and there are a lot of different approaches – each with their own implications.

In this talk we will perform a survey of compression in some of the most popular open source database engines including: Innodb, TokuDB, MongoDB, WiredTiger, RocksDB, and PostgreSQL.

Important information: …

The Percona Live Data Performance Conference 2016 is rapidly approaching, and we’re looking forward to providing an outstanding experience April 18-21 for all whom attend.

Percona Live is the premier event for the rich and diverse open source community and businesses that thrive in the MySQL and NoSQL marketplaces. Attendees include DBAs, sysadmins, developers, architects, CTOs, and CEOs representing organizations from industry giants such as Oracle to start-ups. Vendors increasingly rely on the conference as a major opportunity to connect with potential high-value customers from around the world.

Below are some highlights for the upcoming conference regarding the conference schedule, Tutorial sessions, Birds of a Feather talks, and Lightning talks.

Conference Schedule

Percona Live is packed with engaging sessions, helpful …

We recently released the GA version of Percona Server for MongoDB, which comes with a variety of storage engines: RocksDB, PerconaFT and WiredTiger.

Both RocksDB and PerconaFT are write-optimized engines, so I wanted to compare all engines in a workload oriented to data ingestions.

For a benchmark I used iiBench-mongo (https://github.com/mdcallag/iibench-mongodb), and I inserted one billion (bln) rows into a collection with three indexes. Inserts were done in ten parallel threads.

For memory limits, I used a 10GB as the cache size, with a total limit of 20GB available for the mongod process, …

The Call for Papers for the fifth annual Percona Live Data Performance Conference and Expo (formerly MySQL Conference and Expo) taking place April 18-21, 2016, in Santa Clara, California, is now officially open!

Ask yourself… “Do I have…”

• Fresh ideas?
• Enlightening case studies?
• Insight on best practices?
• In-depth technical knowlege?

If the answer to any of these is “YES,” then you need to submit your proposal for a chance to speak at Percona Live 2016. Speaking is a great way to broaden not only the awareness of your company with an intelligent and engaged audience of software …

Several reports we’re published in the news about how easy it is to access data stored in some NoSQL systems, including MongoDB. This is not surprising because security was rather relaxed in earlier versions of MongoDB . This post lists some of the common vulnerabilities in MongoDB and Percona TokuMX.

Network Security

One key point is to ensure that the bind_ip setting is correctly adjusted: in MongoDB 2.4 and Percona TokuMX, it is not set which means that the server will listen to all available network interfaces. If proper firewall rules (iptables, Security Groups in AWS, …) are not in place, your dataset could easily be queried from anywhere in the world!

In MongoDB 2.6+, bind_ip is set by default to 127.0.0.1 in the official .deb and .rpm packages. This is great from a security point of view, but remember that you’ll still have to adjust the setting if the application servers are not …

In this article, we introduce myawr and mongoawr system .

Read this PDF, you will learn how to configure them.

How to configure AWR system.

In my recent benchmarks for MongoDB, we can see that the two engines WiredTiger and TokuMX struggle from periodical drops in throughput, which is clearly related to a checkpoint interval – and therefore I correspond it to a checkpoint activity.

The funny thing is that I thought we solved checkpointing issues in InnoDB once and for good. There are bunch of posts on this issue in InnoDB, dated some 4 years ago.  We did a lot of research back then working on a fix for Percona Server

• https://www.percona.com/blog/2011/04/04/innodb-flushing-theory-and-solutions/
• …

Previously I tested Tokutek’s Fractal Trees (TokuMX & TokuMXse) as MongoDB storage engines – today let’s look into the MySQL area.

I am going to use modified LinkBench in a heavy IO-load.

I compared InnoDB without compression, InnoDB with 8k compression, TokuDB with quicklz compression.
Uncompressed datasize is 115GiB, and cachesize is 12GiB for InnoDB and 8GiB + 4GiB OS cache for TokuDB.

Important to note is that I used tokudb_fanout=128, which is only available in our latest Percona Server release.
I will …

Today Percona announced the immediate availability of 24/7, enterprise-class support for MongoDB and TokuMX. The new support service helps organizations achieve maximum application performance without database bloat. Customers have round-the-clock access (365 days a year) to the most trusted team of database experts in the open source community.

The news means that Percona now offers support across the entire open-source database ecosystem, including the entire LAMP stack (Linux, Apache, MySQL, and PHP/Python/Perl), providing a single, expert, proven service provider for companies to turn to in good times (always best to be proactive) – and during emergencies, too.

Today’s support announcement follows …