- Who we are
- What we know
- What we've created
- Hints and Kinks
- Checking Corosync cluster membership
- Configuring radosgw to behave like Amazon S3
- Downgrading to DRBD 8.3
- Fencing in Libvirt/KVM virtualized cluster nodes
- Fencing in VMware virtualized Pacemaker nodes
- GFS2 in Pacemaker (Debian/Ubuntu)
- Interleaving in Pacemaker clones
- Maintenance in active Pacemaker clusters
- Managing cron jobs with Pacemaker
- Mandatory and advisory ordering in Pacemaker
- Migrating virtual machines from block-based storage to RADOS/Ceph
- Network connectivity check in Pacemaker
- OCFS2 in Pacemaker (Debian/Ubuntu)
- Solid-state drives and Ceph OSD journals
- Solve a DRBD split-brain in 4 steps
- Testing Pacemaker clusters
- Totem "Retransmit List" in Corosync
- Turning Ceph RBD Images into SAN Storage Devices
- Which OSD stores a specific RADOS object?
- Presentations
- Ceph Tutorial (LCA 2013)
- Ceph: The Storage Stack for OpenStack (OpenStack Israel 2013)
- Die eigene Cloud mit OpenStack Essex (German, LinuxTag 2012)
- Fencing (LCE 2011)
- GlusterFS in HA Clusters (LCEU 2012)
- GlusterFS und Ceph (German, CeBIT 2012)
- Hands-On With Ceph (LCEU 2012)
- High Availability Update (OpenStack Summit Fall 2012)
- High Availability in OpenStack (CloudOpen 2012)
- High Availability in OpenStack (OpenStack Conference Spring 2012)
- Highly Available Cloud: Pacemaker integration with OpenStack (OSCON 2012)
- Mit OpenStack zur eigenen Cloud (German, CLT 2012)
- Mit OpenStack zur eigenen Cloud (German, OSDC 2012)
- More Reliable, More Resilient, More Redundant (OpenStack Summit April 2013)
- MySQL HA Deep Dive (MySQL Conference 2012)
- MySQL High Availability Deep Dive (PLUK 2012)
- MySQL High Availability Sprint (PLUK 2011)
- OpenStack Essex im Praxistest (German, Linuxwochen Wien 2012)
- OpenStack High Availability Update (Grizzly and Havana)
- Roll Your Own Cloud (LCA 2011)
- Storage Replication in HPHA (LCA 2012)
- Zen of Pacemaker (LCA 2012)
- hastexo in 100 Seconds
- Technical documentation
- News releases
- Hints and Kinks
- What we do
- What we charge
- What others say
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Disaster Recovery
You did your best to secure your setup against outages caused by hardware failures or infrastructure outages? That's great! But would your setup survive a catastrophic failure? This is where disaster recovery comes in. And with the Linux Cluster Stack, you've already got all the tools for effective disaster recovery in your hands!
Disaster doesn't strike often, but it does strike
Many people consider it a pointless exercise to even think about natural or man-made disasters. History proves them wrong: Natural disasters have regularly destroyed IT infrastructure whenever they happened. Good examples are the 2002 Elbe flood in Germany (amongst other facilities, the NOC at the Dresden University of Technology was completely flooded) or Hurricane Katrina, which destroyed numerous datacenters along its path. And such cataclysms aren't even the only real danger: In 2002, a fire destroyed Twente University's server room. By the way – ever wonder what happens if a backhoe cuts your datacenter's network uplink?
Better safe than sorry
No matter whether your platform becomes unavailable due to physical damage or for less dramatic reasons: If you rely on your online services (and really, who does not?), any extended downtime can easily kill your business. But that doesn't need be! The Linux Cluster Stack together with DRBD allows you for comprehensive disaster recovery scenarios. Outwit Murphy!
3-node replication with DRBD
Getting your data replicated to another site is the first step on the way to datacenter independence. DRBD's 3-node replication feature takes care of this for you. If your primary site goes south, a full copy of your most recent data will be available in your second datacenter. Combining this with a set of application servers and a BGP-routed IP network will enable you to be online within minutes after a site failure. Sounds tempting?
We've been there, we've done that
We're who you're looking for if you want high availability across datacenters. We can help you plan and implement disaster recovery concepts just like we did for many customers before. And we know the necessary components inside and out.
Want to sleep soundly? Get in touch with us to find out how we can help your business. Our expert disaster recovery consulting services will make a difference. Ask The Expert Now!