DRBD is a Distributed Replicated Block Device. Developed by LinBit it is now part of the standard-linux-kernel. Regard it as RAID 1 across an IP-network using any type of block device. Normally only the "primary" side can write.
Questions tagged [drbd]
283 questions
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1 answer
DRBD Dual Primary Revisited
It is an old datum that it is not possible to use a non-cluster-aware filesystem like ext4 on Linux with DRBD in dual-primary mode.
For example, as stated by Linbit in their manual "Dual Primary - think twice":
DRBD replicates the changes from node…
nepdev
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How long it took the initial sync drbd with a 6TB raid
I created a two node drbd drive and creating the initial synchronization of distributed file system drbd, this taking days. It is a raid5 with 3 disks 3TB each, creating a 6TB raid which mirrored by drbd replicate on another computer.
The issue is…
user184612
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Why does DRBD infrastructure resyncs whole partition several times a day
I have a Primary/Secondary 2 nodes DRBD setting as shown
global { usage-count no; }
common { syncer { rate 4M; } }
resource r0 {
protocol B;
startup {
wfc-timeout 15;
degr-wfc-timeout 60;
}
…
shrek
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Using DRBD with 100mbit uplink
we are planing to use drbd to sync two servers (different hardware) to get kind of HA in case the master server dies.
The servers are hosted physically in the same datacenter (Hetzner in germany) and they are running with openSUSE.
The main purpose…
Link.de
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MySQL differential dump? Other strategy for restore?
Is it possible to generate a differential dump with mysqldump - between two databases, or, ideally, between a database and a dumped version of that database?
Here's the issue I've got - I have an active/passive HA mirror of MySQL with the actual DB…
Alex Balashov
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OpenVZ - vzdev kernel module issue
I am setting up a Centos 6.3 minimal server with openvz that replicates to another machine using DRBD.
I want all openvz data/files to be kept in a single /vz directory which is an LVM that I am syncing across with DRBD.
I managed to create…
Programster
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Centos 6.3 DRBD / OpenVZ kernel/userland issue
When I start my Centos 6.3 server's drbd service I get the following error:
Starting DRBD resources: DRBD module version: 8.3.13
userland version: 8.4.2
preferably kernel and userland versions should match.
I'm 99% certain this is to do with the…
Programster
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What is the best storage for active-active linux cluster?
We have a cluster with multiple ubuntu machines which are connected to a shared SAN storage. Initially we were using OCFS2 as file system but we were hit with so many issues and we couldn't find proper documentation or support therefore we have…
edalloul
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adding drbd to an existing lvm
I'm going to add drbd to an existing LVM, I want to keep LVM data. I follow this post: http://lists.linbit.com/pipermail/drbd-user/2009-February/011464.html
what I already did
stopped kvm virtual machine using LVM
backup of LVM data with dd
dd…
Lluís
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Why won't DRBD restart?
We run 10 servers, mostly cheap requisitioned desktop machines, all running CentOS 5.1 and Xen. All these 10 servers do is run Xen virtual machines. Someone switched off the power supply to the server cupboard and a couple of machines have fried…
David Hicks
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Fault-tolerant KVM hosts
I'm going to create a simple virtual hosts infrastructure using QEMU+KVM. It is expected to be very simple, without clouds or any other cool things. Right now the only requirement is the fault-tolerance for data (hosts' disk images online backup).…
Stan
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DRDB and NFS: NFS downtime during failover restoration
I'm pretty new to DRBD and NFS, and am in the process of testing a DRDB server with heartbeat to use for our company's NFS share.
The entire setup is running fine, with the NFS state directory running on the DRDB share as together with the actual…
Willemk
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drbd installation in Ubuntu 10.04
In the guide on drbd.org, it says that:
To get DRBD, you need to enable the universe component for your preferred Ubuntu mirror in /etc/apt/sources.list
What does this mean? In my sources.list everything is already uncommented. Do I need to add…
Aaron
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drbd module setup ubuntu 10.04 LTS
I am giving the following command.
sudo apt-get install drbd8-utils drbd8-module-source \
build-essential module-assistant
and when I do, the response I get is
Note, selecting drbd8-source instead of drbd8-module-source
drbd8-source is…
Aaron
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Setting up DRBD on rackspace servers
Is it possible to do? I have been trying for the last couple of days to no avail. Every place I look says that the two machines have to have a partition of the exact same size, and you cannot partition hard drives on rackspace (according to their…
Aaron
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