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Ask The Expert Now covers DRBD

Submitted by florian on Wed, 2012-03-28 16:52

If you need help with DRBD right now, an expert technical consultant is immediately available to help you.

On my (ex-)maintainership of the DRBD User's Guide

Submitted by florian on Tue, 2012-03-20 13:01

Here's a quick summary of my past and current relationship with the DRBD User's Guide.

Storage Replication in High-Performance High-Availability Environments

At linux.conf.au 2012, Florian gave this presentation on the integration of DRBD, Flashcache and Pacemaker in the High Availability and Distributed Storage miniconf.

Roll Your Own Cloud

In this talk (with a highly unusual presentation style!), Florian and Tim Serong explore the capabilities of KVM, iSCSI, DRBD and Pacemaker to create a fully open-source enterprise cloud.

Solve a DRBD split-brain in 4 steps

Whenever a DRBD setup runs into a situation where the replication network is disconnected and fencing policy is set to dont-care (default), there is the potential risk of a split-brain. Even with resource level fencing or STONITH setup, there are corner cases that will end up in a split-brain.

Downgrading to DRBD 8.3

A popular question to pop up on the drbd-user mailing list is how to downgrade from a DRBD 8.4.x installation to DRBD 8.3. Luckily, the developers haven't made this hard; there's just one specific thing you'll have to remember. We'll show you how to do this.

hastexo High Availability Expert Training

You know how to install DRBD, Corosync and Pacemaker and how to get them set up for everyday's business? That's great, because then you're ready take your Linux and High Availability knowledge to the next level.

2-node storage pool with DRBD and OCFS2

Cost Estimate

Prerequisites:

  • 2 servers with sufficient resource capacities (CPU, RAM, HDD)
  • One of the following distributions: 
    • Debian (6.0 or higher), 
    • Ubuntu (10.04 or higher) or
    • SUSE Linux Enterprise Server (11 SP1 or higher)
  • Two independent cluster communication channels (IP network)
  • Fencing (STONITH) necessary, IPMI or another remote-controlling mechanism required

Included Tasks: 

  • Installation of DRBD
  • Setup of a dual primary DRBD resource 

DRBD

DRBD (a registered trademark of LINBIT, who maintain the project) is a solution for redundant data storage within HA setups. It enables you to mirror data from one server over to another, keeping it available even if one of the two servers fails.

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