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New Webinar: Performance Tuning of HAProxy for Database Load Balancing

August 13, 2014 By Severalnines

 

New Webinar: Performance Tuning of HAProxy for Database Load Balancing

As a follow-up to our previous webinar on MySQL Load Balancing and HAProxy, we are glad to organize a new webinar on Performance Tuning of HAProxy. Tuning your HAProxy instances can significantly increase the performance of your application and decrease response times. Joint us for this special session to find out more!

 

Date, Time & Registration: 

Tuesday, September 9th @10am CEST (Europe & MEA / Asia Pacific)

Register here

Tuesday, …

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Clustering Moodle on Multiple Servers for High Availability and Scalability

August 12, 2014 By Severalnines

Moodle is an open-source e-learning platform (aka Learning Management System) that is widely adopted by educational institutions to create and administer online courses. For larger student bodies and higher volumes of instruction, moodle must be robust enough to serve thousands of learners, administrators, content builders and instructors simultaneously. Availability and scalability are key requirements as moodle becomes a critical application for course providers. In this blog, we will show you how to deploy and cluster moodle/web, database and file-system components on multiple servers to achieve both high availability and scalability. 

 

We are going to deploy moodle on top of GlusterFS clustered file system and MariaDB Galera Cluster 10. To eliminate any single point of failure, we will use three nodes to serve the application and database while the remaining two are used for …

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How-to and Performance Impact of SSL-Encrypted Replication Traffic in Galera Cluster for MySQL

August 7, 2014 By Severalnines

 

Deploying Galera Clusters across WAN environments might lead to concerns around data privacy and security - especially as more organisations are having to comply with national and international regulations. You would not want hackers eavesdropping or intercepting replication traffic. Encrypted replication hides what is sent between the Galera nodes, and makes sure each node is only communicating to the ones it trusts. But how expensive is encryption?

 

In this blog, we will show you how to encrypt the replication traffic between your Galera nodes. We will also look into the performance impact of this encryption.

 

Encrypted Replication

 

Galera supports SSL for the encryption of replication traffic. When encryption is enabled, Galera group communication and Incremental State Transfer (IST) happens over an SSL-encrypted …

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We’d love to go to Paris for the OpenStack Summit - please vote for our talks!

August 6, 2014 By Severalnines

 

Well over a thousand sessions have been submitted for the OpenStack Summit and two of them includes our good selves! We’ve submitted two talks with partners of ours: 

 

… and would love it if the talks were included in the final agenda. For that to happen, we need a few more of your votes today!

 

The OpenStack Summit is a five-day conference for developers, users, and …

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How to Configure ClusterControl to run on nginx

July 10, 2014 By Severalnines

ClusterControl uses the Apache HTTP Server to serve its web interface, but it is also possible to use nginx. nginx + PHP fastcgi is well-known for its capabilities to run on a small memory footprint compared to standard Apache + PHP DSO.

 

In this post, we will show you how to run ClusterControl on nginx web server by swapping out the default Apache web server installed during the initial deployment. This blog post does not mean that we officially support nginx, it just an alternative way that a portion of our users have been interested in. For instance, Phil Bayfield wrote a blog on the same topic a while back.

 

Apache Configuration

 

Before we jump into nginx configurations, let’s look at how the …

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New Webinar on July 9th: How To Set Up SQL Load Balancing with HAProxy

June 17, 2014 By Severalnines

 

We continuously see great interest in MySQL load balancing and HAProxy, so we thought it was about time we organised a live webinar on the topic!

 

As most of your will know, database clusters and load balancing go hand in hand. 

 

Once your data is distributed and replicated across multiple database nodes, a load balancing mechanism helps distribute database requests, and gives applications a single database endpoint to connect to. 

 

Instance failures or maintenance operations like node additions/removals, reconfigurations or version upgrades can be masked behind a load balancer. This provides an efficient way of isolating changes in the database layer from the rest of the …

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Big Data Integration & ETL - Moving Live Clickstream Data from MongoDB to Hadoop for Analytics

June 16, 2014 By Severalnines

MongoDB is great at storing clickstream data, but using it to analyze millions of documents can be challenging. Hadoop provides a way of processing and analyzing data at large scale. Since it is a parallel system, workloads can be split on multiple nodes and computations on large datasets can be done in relatively short timeframes. MongoDB data can be moved into Hadoop using ETL tools like Talend or Pentaho Data Integration (Kettle).

 

In this blog, we’ll show you how to integrate your MongoDB and Hadoop datastores using Talend. We have a MongoDB database collecting clickstream data from several websites. We’ll create a job in Talend to extract the documents from MongoDB, transform and then load them into HDFS. We will also show you how to schedule this job to be executed every 5 minutes.

 

Test Case

 

We have an application …

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Join Us at the European MariaDB Roadshow this Summer!

June 12, 2014 By Severalnines

We’re delighted to be joining Team MariaDB at SkySQL with a talk on ‘Automation & Management of Database Clusters’ as they tour across several European regions in the coming weeks.

 

Whether you’re a MariaDB enthusiast or newbie, a MySQL veteran or newbie, or even a MongoDB user who also happens to run MySQL or MariaDB databases: this roadshow is a good place to find out about the latest developments on the MariaDB database as well as related tools and technologies. 

 

From our own perspective, we’ll be updating participants on how to best automate & manage their database clusters, and demo some of the capabilities of …

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How to Deploy Percona XtraDB Cluster without Internet Connection

May 23, 2014 By Severalnines

If you need to deploy a database cluster behind your corporate firewall, on servers with no internet access, then this blog is for you. Most of the installation tutorials out there require servers to have an internet connection, and that would not work very well with companies under strict policies and compliance guidelines. 


Our online Galera Configurator supports deployment without Internet connection for Percona XtraDB Cluster. You would need to prepare a minimum of four hosts (three DB nodes and one management node), generate a Deployment Package from the Configurator and copy it to the ClusterControl host. In this post, we will show you how to deploy Percona XtraDB Cluster 5.5 in an environment without internet connection on CentOS 6.5 (installed with minimal installation). Our setup is …

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Archival and Analytics - Importing MySQL data into Hadoop Cluster using Sqoop

May 16, 2014 By Severalnines

We won’t bore you with buzzwords like volume, velocity and variety. This post is for MySQL users who want to get their hands dirty with Hadoop, so roll up your sleeves and prepare for work. Why would you ever want to move MySQL data into Hadoop? One good reason is archival and analytics. You might not want to delete old data, but rather move it into Hadoop and make it available for further analysis at a later stage. 

 

In this post, we are going to deploy a Hadoop Cluster and export data in bulk from a Galera Cluster using Apache Sqoop. Sqoop is a well-proven approach for bulk data loading from a relational database into Hadoop File System. There is also Hadoop Applier available from …

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Showing entries 31 to 40 of 94
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