DRBD

DRBD is a distributed replicated storage system for the Linux platform. It is implemented as a kernel driver, several userspace management applications, and some shell scripts. DRBD is traditionally used in high availability (HA) computer clusters, but beginning with DRBD version 9, it can also be used to create larger software defined storage pools with a focus on cloud integration.

A DRBD device is a DRBD block device that refers to a logical block device in a logical volume schema.

The DRBD software is free software released under the terms of the GNU General Public License version 2.

DRBD is part of the Lisog open source stack initiative.

DRBD usage

- Maintenance:

--drbdadm status #get node array status

--cat /proc/drbd #check connection and role

--drbdadmin disconnect <…name…> #disconnect array

<tasks...>

--reboot.done.