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.

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2answers
748 views

DRBD stacked resources: recovering from failure

We're running a stacked four-node DRBD setup like this: A --> B | | v v C D This means three DRBD resources running across these four servers. Servers A and B are Xen hosts ...
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1answer
28 views

DRBD/Corosync mysql clutser

I have configured HA cluster on two nodes host1 and host2. host1 is master and host2 is slave. If I shutdown host1 then host2 never comes up as master until I restart openais service. Some time I ...
3
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3answers
2k views

Extremely slow resync rate of DRBD on dedicated gigabit

I've set up DRBD on 2 nodes, and started using it yesterday. After about an hour, it had resynced 50% of the partition. Another 12 hours passed, and it's up to 79%, and moving VERY slow. Here's what ...
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1answer
63 views

What's the best way to sync folders across 03 or more webservers? [closed]

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but ...
3
votes
0answers
98 views

Pacemaker DRBD resource not getting promoted to master on any node

First off, I'm no linux specialist, I've been following tutorials and been working with the help of google, this worked out fine until now, but currently I'm stuck with a problem. I'm using CentOS 6.5 ...
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2answers
38 views

Adding a 3rd node to an existing DRBD cluster

We currently have a 2 node DRBD cluster running which we would like to add a third node to. I have so far been unable to find any resources on whether it is possible to add a third node to an existing ...
0
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1answer
1k views

DRBD setup problem

I'm so new to DRBD, please help me fixing the problem below. Enclosed my drbd.conf. Many thanks [root@skonkwerks1 ~]# drbdadm create-md all open(/dev/hdb3) failed: No such file or directory Command ...
2
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2answers
115 views

DRBD Madness on Virtual Environment (XEN)

Right now I am using DRBD to replicate two directories (/var/www and /var/spool/mail) on two different XEN VPS's and they're 7000 Miles away from each other! on the top of that I am using a ...
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2answers
129 views

DRBD Dual-Primary Obstacles

I have DRBD installed and configured on two different servers, everything is working as expected but I am having a horrible I/O disk read/write speed and network latency like crazy, my shared ...
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2answers
93 views

DRBD protocol c and split brain

According to DRBD documentation of replication mode. Protocol C. Synchronous replication protocol. Local write operations on the primary node are considered completed only after both the local and ...
1
vote
1answer
109 views

Installing DRBD on XEN CentOS 5.8 (Stable)

I am trying for days to achieve HA with fault tolerance between my existing two XEN VPS's one located in Tokyo and the other located in US (both have the same setup and the same configurations, I am ...
1
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0answers
143 views

Pacemaker with drbd split-brain on two nodes

Gentlemen, I have a question concerning active/passive split-brain when using pacemaker with drbd. I realize that split-brain is a long topic, but i am trying to solve one exact situation: if both ...
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0answers
55 views

GFS2 without LVM on CentOS 5.7

I am using DRBD and I just synced 40GB between 2 nodes for the last 3 days and I am using GFS2 without LVM, I formatted the partition just fine but now I can't mount it /sbin/mount.gfs2: invalid ...
1
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0answers
59 views

High Availability/failsafe two different locations

I am wondering if someone could help with the setup that does not seem so difficult. I am just beginning with the multi-server setup. I apologize if my questions are dumb. I have two debian servers ...
2
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5answers
2k views

DRBD vs. GlusterFS for replication

I need to build a solution to host internal git repositories. It needs to supports hundreds of thousands (or more) repositories. I plan on using multiple "dumb" servers with a shared storage, so ...
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0answers
66 views

DRBD network requirements

We currently have a DRBD based replication on an pair of Asterisk servers, where we use DRBD for file and MySQL data replication on an active/passive usage scenario, using protocol B ...
0
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0answers
154 views

CentOs 6.5 GFS2 DRBD SAMBA CTDB : g_lock_force_unlock: Could not store record: NT_STATUS_UNSUCCESSFUL

My SAMBA cluster is unreliable, I noticed that from Windows desktop (on some occasion works fine but it is not reliable), on Ubuntu I'm getting this error (same is keep repeating in the log): ...
2
votes
3answers
770 views

DRBD for Windows / Hyper V

DRBD is a protocol for mirroring the storage on one server with the storage on another. Essentially it gives you a highly available (HA) cluster of storage across two or more physical machines, ...
0
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0answers
31 views

Is it safe to upgrade a current mysql CentOS 6.0 server to CentOS 6.5?

This server has specific configuration of php, it is also acting as a node in a DRBD cluster which holds a critical MYSQL database. I wanted to know if this procedure is safe and if there are any ...
0
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2answers
98 views

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; ...
0
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0answers
60 views

Are there any known issues with different versions of DRBD running on different nodes in the same cluster?

We have two database servers, as part of some trial we tried using Dell Fusion IO disks as the database / logs disks. We've experienced some problems and Dell were not able to resolve them so we're ...
0
votes
1answer
474 views

Proxmox drbd configuration split brain

I am planning a proxmox HA configuration with two Dell R710 machines (dual 6 core processors in each) with enterprise level drive raid arrays. I would be using DRBD with a quorum disk on a third ...
0
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0answers
29 views

Repair tables after pacemaker + drbd migration/failover

I have a master/slave pacemaker/drbd cluster that handles mysql, apache, and some other stuff. I'd like to have mysql automatically repair tables (mysqlcheck -A --auto-repair or similar) after ...
0
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1answer
230 views

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 - ...
5
votes
1answer
2k views

Why do I see a large performance hit with DRBD?

I see a much larger performance hit with DRBD than their user manual says I should get. I'm using DRBD 8.3.7 (Fedora 13 RPMs). I've setup a DRBD test and measured throughput of disk and network ...
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2answers
504 views

How should I backup this large volume?

I have a 10TB XFS filesystem on a SLES 10.2 server. I am currently running rsync on it once per day, to sync it with a disk-based online backup on another server. The primary volume is quite busy as ...
0
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1answer
92 views

How to configure DRBD to work like standalone node, but synchronizing

I want the DRBD performance like a standalone node, but synchronizing, understand as: Asynchronous replication protocol. Local write operations on the primary node are considered completed as soon as ...
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votes
2answers
202 views

Backup a DRBD resource (compressed and incremental)

I have a DRBD resource, Primary and Secondary (EXT4 - No LVM) What is the more suitable way to do a backup on the DRBD resource with compressed data and incremental backup?
2
votes
1answer
380 views

Need an interface for an Elastic IP (DRBD & EC2)

We are trying to mirror a volumes over a geographical zone using DRBD (and Ubuntu 11.10). We are using elastic IP's - however there is no local interface for Elastic IP's - only an interface for a ...
0
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0answers
187 views

DRBD show StandAlone on Primary node after secondary node attach with it?

I am using Centos5.4 & DRBD8.2.6 heartbeat2.1.3 & one java program with Mysql & Asterisk1.6.2.6. On DRBD disk i put 2 service Asterisk & Mysql. SO if DRBD Disk not up both services ...
4
votes
1answer
153 views

DRBD for HA Server in Small Office Questions

Backround: We are in need of a HA server in a small office environment and are looking at DRBD to provide it. We only have about 100GB that needs to be on the HA server and server load will be ...
0
votes
1answer
223 views

drbd master/master without cluster FS

I have planed to use master-slave setup and make nightly backups (just coping data) from slave node to 3rd node. As I understand in master-slave mode it is impossible to read data from slave node? So ...
0
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1answer
97 views

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 ...
0
votes
2answers
292 views

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 ...
0
votes
2answers
245 views

Infiniband, SRP and failover

I am considering an linux-based infiniband storage setup, but I am tripping over whether or not I can do active/passive or active/active failover with DRBD and SRP targets. I am led to believe that ...
1
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1answer
136 views

how to extend the DRBD device online on production server?

Hey folks i am trying to extends the size of DRBD device (/dev/drbd0) online on production server but have to bring down and up the device (/dev/drbd0) twice so the change in size is detected. I ...
4
votes
2answers
9k views

How to setup STONITH in a 2-node active/passive linux HA pacemaker cluster?

I am trying to setup an active/passive (2 nodes) Linux-HA cluster with corosync and pacemaker to hold a PostgreSQL-Database up and running. It works via DRBD and a service-ip. If node1 fails, node2 ...
4
votes
1answer
657 views

Dual Primary OCFS2 DRBD encountered split-brain. Is recovery always going to be manual in this case?

I've got two webservers which each have a disk attached. This disk is synced between them using drbd (2:8.3.13-1.1ubuntu1) in 'dual-primary' mode, and over the top of this I run ocfs2 (1.6.4-1ubuntu1) ...
6
votes
2answers
3k views

Can not switch drbd to secondary

I'm running drbd83 with ocfs2 in centos 5 and planning to use packemaker with them. Afer some time, I'm facing drbd split brain problem. version: 8.3.13 (api:88/proto:86-96) GIT-hash: ...
0
votes
0answers
47 views

DRBD mount randomly unmounts itself

We have setup setup an NFS HA "cluster" using drbd/heartbeat. Everything works as expected when tested... If the instance nfs1 goes down, nfs2 picks up and everything seems to be fine. On both ...
2
votes
1answer
475 views

GFS2 over DRBD automount

I have 2 nodes Proxmox cluster. For KVM images I use DRBD device with GFS2 on it. Everything works fine except GFS2 automounting after server restart. I put in fstab: /dev/drbd0 /cluster/drbd0 gfs2 ...
5
votes
4answers
2k views

DRDB and NFS: is there any efficient way to make failover transparent for NFS

We are implementing DRDB + heartbeat with two servers to have a file system with failover. These servers exposes a NFS service for other servers Currently DRDB is working just fine, but when testing ...
2
votes
0answers
848 views

LVM DRBD Shared between nodes proxmox

Context : I have proxmox cluster with the volume group shared with drbd for the VM - KVM. I have a problem with drbd. Indeed, when a node disconnect, the associate link between the differents nodes ...
1
vote
1answer
88 views

DBRD dual primary Heartbeat resource management

I have the following setup: Two servers with DRBD running dual primary with OCFS2 Heartbeat with two virtual ips, one for each server Round robin DNS to load balance NFS across the two vIPs ...
2
votes
4answers
1k views

DRBD on a file (rather than partition)

We have a number of Xen virtual machines that use disk image files. disk = ["file:/xen/vbd/something.vbd,sda1,w"] We'd like to use DRBD to replicate these files for backup (as opposed to the mess ...
0
votes
1answer
526 views

DRBD LVM - backed vs. physical & LVM filter

We're experimenting with DRBD/pacemaker on top of an existing Debian 6 Encrypted RAID1 setup. We have one comparatively general and one comparatively specific question: 1) DRBD - backed vs. ...
0
votes
1answer
646 views

PacemakerDRBD Mount Issue

We are stuck trying to get pacemaker to work with DRBD, and having tried various alternatives can't get our "drbd1" to mount and get some errors. NOTE: we are trying to get pacemaker to work with an ...
0
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1answer
626 views

after split brain recovery filesystem not mounted

I have an active/passive high availability cluster with pacemaker+split brain. After split brain condition I use automatic split-brain recovery to recover my systems. The problem is that since file ...
0
votes
1answer
368 views

Mirroring iSCSI target to slower drive, asynchronous RAID or block-level replication?

I'm planning on setting up a test iSCSI export on my NAS which will be used by a KVM virtualisation host to store all guest volumes and data. My NAS box is a self-build running CentOS. The device ...
1
vote
2answers
106 views

Linux partitioning suggestion for failover setup?

I've been using Ubuntu for a while but didn't really paid attention on partitioning and just accepted the defaults. But on a new project we plan on setting up two old servers HP DL380 G3 both would ...