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Showing entries 1 to 10 of 16 6 Older Entries

Displaying posts with tag: Docker (reset)

Using Cgroups to Limit MySQL and MongoDB memory usage
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Quite often, especially for benchmarks, I am trying to limit available memory for a database server (usually for MySQL, but recently for MongoDB also). This is usually needed to test database performance in scenarios with different memory limits. I have physical servers with the usually high amount of memory (128GB or more), but I am interested to see how a database server will perform, say if only 16GB of memory is available.

And while InnoDB usually respects the setting of innodb_buffer_pool_size in O_DIRECT mode (OS cache is not being used in this case), more engines (TokuDB for MySQL, MMAP, WiredTiger, RocksDB for MongoDB) …

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Playing with Percona XtraDB Cluster in Docker
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Like any good, thus lazy, engineer I don’t like to start things manually. Creating directories, configuration files, specify paths, ports via command line is too boring. I wrote already how I survive in case when I need to start MySQL server (here). There is also the MySQL Sandbox which can be used for the same purpose.

But what to do if you want to start Percona …

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Galera for Mesos
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This time it is nothing like a linkt to another Blog:  Galera on Mesos

Ok as a fact I was kinda involved. Even the work is done by Stefan all alone.We meat for a day in a coworking space and discussed about Galera and Mesos.
In the end Stefan produced this incredible blogpost and pushed Mesos forward.
Whats the fun about this post?
We already now Galera is already the standard in a lot of architectures. For example OpenStack.Doing consultant work for Docker also I encourage to use Galera for all this infrastructures Docker runs …




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Putting MySQL Cluster in a container
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To get more familiar with docker and to create a test setup for MySQL Cluster I created docker images for the various components of MySQL Cluster (a.k.a. NDB Cluster)

At first I created a Fedora 20 container and ran all components in one container. That worked and is quite easy to setup. But that's not how one is supposed to use docker.

So I created Dockerfile's for all components and one base image.

The base image:

  • contains …







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Which tech do startups use most?
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Leo Polovets of Susa Ventures publishes an excellent blog called Coding VC. There you can find some excellent posts, such as pitches by analogy, and an algorithm for seed round valuations and analyzing product hunt data. He recently wrote a blog post about a topic near and dear to my heart, Which Technologies do Startups […]

My talks about MySQL, Galera and LXC (and friends) [UPDATE]
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Im giving some talks this year:

MySQL Hochverfügbar mit Galera

Location: FrOSCon

About: Learn about Galera and deploy it using LXC and Ansible

LBaaS-Loadbalancer as a Service

Place: GUUG Frühjahrsgespräche

Topic: It is a workshop ( together with Jan Walzer and Jörg Jungermann). We are going to show how to use LXC to provide slim loadbalancers.

Medley der Containertechniken

Place: GUUG Frühjahrsgespräche

Topic: Learn about all the basic techniques vanilla based Container technology uses/shares …

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Sphinx in Docker. The basics.
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With an ear to the interwebs, you’ll hear a few things about Docker. Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. In this blog post, I’m going to outline a very basic example of how to use Sphinx from within a Docker container. What is Docker? This [...]

CoreOS Review
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I have spent a few days now playing with CoreOS and helping other members of HP's Advanced Technology Group get it running on their setups.
Today I thought I would write about the good and the bad about CoreOS so far.  Many components are in an alpha or beta state so things may change over the coming months.  Also as a disclaimer, views in this post are my own and not necessarily those of HP.
Installation
As stated in my blog post yesterday, I have been using CoreOS on my Macbook Pro using Vagrant and VirtualBox.  This made it extremely …


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2xHipster (Docker and Galera) doesn't mean its good.
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Ahoi,

There had been already a couple of blogposts about Docker and Galera in the MySQL community. I've got to confess I love both. But on the other hand I don't think this is a good combination at all. Having a look at the blogpost doing galera with docker Im still not confessed. Im going to tell some points why I think so.

I assume Galera is already well know in the MySQL community :)

Docker is not just another technique to virtualize

Docker is more than just being another way to virtualize. And this may be one of the biggest points I miss with the other blogposts.


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How to setup Docker for Percona ClusterControl and add existing Percona XtraDB Cluster
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In my previous post I showed you how to setup Percona XtraDB Cluster 5.6 on Docker. This time I will show you how to setup Percona ClusterControl and add the existing Percona XtraDB Cluster 5.6 that we’ve managed to setup from the previous post.

Let us note the following details about our existing containers:

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Showing entries 1 to 10 of 16 6 Older Entries

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