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Questions tagged [replication]

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Help removing a failed replica from a FreeIPA setup

I have two FreeIPA servers in my system; ns-1 and ns-2. To my limited knowledge, ns-1 is our main ipa server and ns-2 was setup as a replica. But I may be incorrect in that regard. In my attempts to ...
dutsnekcirf's user avatar
0 votes
1 answer
1k views

Create multiple file from single txt file

I have a single input file that needs to be replicated multiple times with a little change in every file i.e every 30th line in every file is to change. For e.g. My main text file name is D0.txt which ...
Yash54's user avatar
  • 19
3 votes
1 answer
9k views

ZFS send/recv full snapshot

I have been backing up my ZFS pool in Server A to Server B (backup server) via zfs send/recv, and using daily incremental snapshots. Server B acts as a backup server, holding 2 pools to Server A and ...
LooseAlien123's user avatar
1 vote
1 answer
236 views

(Almost-)Atomic way to merge 2 folders

I'm exploring the different ways to add some consistency to a file deployment operation. The current situation is : A current version folder which contains approximately 100K different files /current ...
Bil5's user avatar
  • 113
1 vote
1 answer
250 views

Automating password changes

I'm trying to automate password changes on 36+ servers b/c doing it the manual way to ridiculous and annoying. Basically, I can run a 'grep -ir password' on 1 of my host linux servers and see how many ...
user477924's user avatar
1 vote
0 answers
42 views

Is there a Bash command or series of commands which will identify and remove replicated directories?

I'm working on a developing a script which will, inside of a directory, verify the existence of a sub-directory, then locate and delete replicated copies in the same directory. For example: A ...
William Hauk's user avatar
1 vote
1 answer
653 views

ZFS send/receive whilst changing dataset properties

Summary: Is a ZFS send/receive always to receive an exact replication of the sending dataset - matching dataset properties included - or is it possible to receive into a newly created dataset with ...
wardw's user avatar
  • 336
0 votes
1 answer
12 views

How to change journal attribute in Hitachi F900

To configure Hitachi Universal Replication, I need to change the journal attribute from initial to restore. How can I do this?
Dexpras's user avatar
  • 99
0 votes
0 answers
28 views

Data syncronization

I am planning to provision a medium scale NAS server at my site and at the DR location. I expect this to be around 20Tb. Mostly this will have a fileserver type workload, with few updates to existing ...
symcbean's user avatar
  • 5,687
1 vote
0 answers
101 views

differences between two rsync commands

I'm following the postgresql documentation for upgrading a cluster of 2 machines - one primary and one secondary (with replication..). According to the docs, I need to upgrade only the primary and ...
JeyJ's user avatar
  • 139
1 vote
0 answers
49 views

OpenLDAP cluster: deletion of an entry is not replicated

We have an OpenLDAP 2.4 cluster of three nodes configured in multi-master and accessed through a VIP in round-robin. The three machines run RHEL7. We noticed that deletion of an entry (done from a ...
dr_'s user avatar
  • 30k
1 vote
0 answers
19 views

Currently I have two node cluster (SLES as HANA DB). I would like to check in which condition a failover will be triggered?

Below are the conditions. We could not test these because these nodes are already in production. Replication between the nodes fail. Replication is working but network link is down with no bonding. ...
Fabian19's user avatar
0 votes
1 answer
1k views

How to verify which is primary node in a HANA DB cluster operating on SLES 12?

Currently I have two HANA DB servers in a cluster and replication is not running. Upon checking from SUSE Hawk, node 2 is acting as primary node and node 1 is available. How do I confirm that node 2 ...
Fabian19's user avatar
2 votes
1 answer
1k views

Cannot replicate DNS zone data from master on LAN to slave behind firewall in a DMZ

Here is some information about my setup. I have a master DNS server in my LAN subnet running on a Ubuntu 16.04 box. In addition, I have some slave DNS servers on my various other subnets (DMZ subnet, ...
Søren Sjøstrøm's user avatar
1 vote
1 answer
93 views

Failover physical and virtual machine with replication. Is it possible?

I want to create HA cluster with 2 nodes. First node is physical machine, second is virtual (under ProxMox). Both running under Ubuntu. I know how to make HA with corosync and pacemaker. How i can ...
Nick's user avatar
  • 13
1 vote
0 answers
315 views

GlusterFS peer rejected and no data replication following reboot

I'm experimenting with glusterfs on ubuntu16.04. Setup consists of: Gluster-server node1: ubuntu16-2 Gluster-server node2: ubuntu16-3 Gluster-client: ubuntu16-1 I've setup a gluster volume named '...
joebegborg07's user avatar
3 votes
2 answers
853 views

Unidirectional syncing/replicate large file incrementally

I have a binary file on a Linux server that is being actively appended by a process (written in C with a constantly open file handler and flushing non-ASCII buffer to this file). I would like to ...
rocketman's user avatar
1 vote
0 answers
1k views

FreeNAS: Snapshots on replicated datasets disappear

I am running 2 FreeNAS boxes (let's call them A and B). A is the production server which contains multiple datasets on mirrored/striped ZFS volumes for sharing via cifs, nfs, etc. A is configured to ...
trapperjohn's user avatar
12 votes
1 answer
13k views

ZFS on Linux send/receive resume on poor/bad ssh connection

I am using ZFS on Linux, and trying to setup remote replication. But I have bad ssh connection, and zfs send/receive over ssh restarts again. I know there is a issue on ZoL, but I don't know when it ...
Ural's user avatar
  • 486
-1 votes
1 answer
43 views

Cloning 20 machines a week: how to clone to variable size destination drives (small to large) [closed]

I work with a non-profit that installs an Ubuntu variant on machines every week, thousands per year. However, the destination hard drive size varies depending on what's donated. The current install ...
Bryce's user avatar
  • 184
2 votes
1 answer
4k views

GlusterFS replicated volume - mounting issue

I'm running GlusterFS using 2 servers (ST0 & ST1) and 1 client (STC), and the volname is rep-volume. I surfed the net, and read all articles explaining how to fix mounting issues but unfortunately ...
Parsa Samet's user avatar
1 vote
1 answer
1k views

Branch File Server Caching- Linux

We want to centralize our Linux file server in the cloud (AWS). We don't want a full copy of each file to be downloaded every time there is a change to that file. I am somewhat familiar with Windows ...
Benjamin Jones's user avatar
1 vote
0 answers
242 views

BTRFS send only new files without deleting anything on remote

I'm looking into replacing rsync with BTRFS tools, but I'm not sure if what I want to do is even possible. I have a small local volume and a large remote volume used for archiving. Files will be ...
Simon Jackson's user avatar
2 votes
1 answer
498 views

Automating Master/Master replication setup and configuration on two servers

I'm in the middle of writing a script to automate configuring MySQL replication between two servers (Master/Master replication), and was looking for some advice on a few things related to MySQL. The ...
Justin's user avatar
  • 495
29 votes
6 answers
73k views

how to one-way mirror an entire zfs pool to another zfs pool

I have one zfs pool containing several zvols and datasets of which some are also nested. All datasets and zvols are periodically snapshotted by zfs-auto-snapshot. All datasets and zvols also have some ...
Costin Gușă's user avatar
1 vote
1 answer
603 views

Replicating growing log files in a near real-time manner over the network

I have a server with a bunch of processes writing log files as they run. I need to enable a client host to get a replica of the server-side log files in a near real-time manner. Is there a better way ...
Dmitry Aleks's user avatar
7 votes
1 answer
2k views

Btrfs/ZFS Network Replication

Is it possible to replicate a ZFS or Btrfs raid volume in real-time (or as close to as possible, network specs aside) over a network? ZFF and Btrfs are ideal because of their CoW properties. I'm ...
DevinM's user avatar
  • 151
0 votes
1 answer
2k views

Couldn't connect to the primary server: postgresql HA installation

Trying to install Postgresql-9.4 High Availability (HA) in RHEL7, using three nodes. In all three nodes, installed postgresql, updated postgresql.conf and pg_hba.conf files accordingly. After ...
GIRI's user avatar
  • 877
1 vote
1 answer
4k views

OpenLDAP's cn=config is not getting fully replicated

I've got OpenLDAP 2.4.39 master and a read-only replica, using the cn=config aka "OLC" configuration (as oppose to the older slapd.conf method). Replication works for data (user accounts, etc) but ...
MLu's user avatar
  • 2,120
1 vote
0 answers
499 views

GPO with SAMBA as DC

I am working on a network of 500 Windows workstations with Linux servers. SAMBA 4 is in use as the domain controller. Users can move between workstations, and as a results the contents of their ...
TSG's user avatar
  • 1,748
3 votes
1 answer
9k views

DRBD Failure: (127) Device minor not allocated

I use wmware workstation to run two virtual machines with OpenVZ 2.6.32-042stab108.2 installed on top on CentOS 6.6. I have created another primary partition, /dev/sda4, to configure it as drbd ...
Tanatos Daniel's user avatar
1 vote
1 answer
448 views

Can set up a cron job to copy my server to Amazon S3

I have an Ubuntu 12.04 install on physical hardware. I will then install Geonode on it. The system will be running at a place with variable network capacity. My colleagues will add data and should ...
ragnvald's user avatar
  • 111
0 votes
0 answers
742 views

Trying to setup a 2 way file sync in Linux

I am trying to setup a 2 way file sync in linux of reasonably small data-set. I would like to replicate data over WAN so distributed filesystems like gluster are not in point of my interest - they are ...
user2008937's user avatar
1 vote
1 answer
214 views

Rebooting Centos Servers configured with MYSQL Master/Slave Replication

Sometime ago we configured MYSQL replication on our main web server to another CentOS 6 server. All is working perfectly and we can see the replication is working fine. My question is how to safely ...
Tony Merlin's user avatar
2 votes
1 answer
2k views

Option --skip-slave-start Not Working with Systemctl

I just started with centos 7. I'm trying to get replication working and am attempting to start mysql without starting the slave (so that I can set the pointers as to where it's supposed to resume ...
WXMan's user avatar
  • 123
1 vote
2 answers
173 views

fs synchronization among desktops

I have several workstations (laptops and desktops). I'd like to synchronize files among them such that each one is a mirror of the other. I used to run an NFS server and share files out, but that ...
Walter's user avatar
  • 1,234
1 vote
1 answer
150 views

zfs replication temporary file

I'm running a zfs replication task, of a snapshot size ~2.5GB. I see that there is traffic going between the master and the slave, by using snoop, but I want to monitor the transmission. Is there a ...
csny's user avatar
  • 1,515
1 vote
1 answer
412 views

GlusterFS use Geo-replication or normal gluster?

We have 4 offices with ipsec lan2lan over fibre net (20-100 mbit on eache office, except one office with 10 mbit fibre). Latency is below 20 ms (between to of the offices with fastest network we have ...
Henrik Ormåsen's user avatar
2 votes
1 answer
5k views

Segmentation fault (core dumped) when try to run iptables rhel6

I'm currently trying to set up a MySQL replication and I don't have a /etc/sysconfig/iptables. So I tried to install it with yum install. It showed the following output. Installed Packages Name ...
BlueFox's user avatar
  • 121
5 votes
1 answer
1k views

Periodic filesystem replication wih snapshot

I'm looking for a non-realtime replication solution that supports periodic snapshot. Here's my current situation: I have 2 email servers running Ubuntu 12.04 LTS The mail server program I use is ...
pepoluan's user avatar
  • 1,353
2 votes
2 answers
255 views

Copy website from RedHat to CentOS

We currently have our website and website's CMS hosted on a dedicated host which runs Red Hat. We want to remove Red Hat and install CentOS instead. My question: is there a straight forward way of ...
oshirowanen's user avatar
  • 2,631
1 vote
2 answers
921 views

Installation of RHEL and softwares on multiple machines

In our organization, we have 15 new systems each with same hardware. I need to setup all the machines with RHEL 6.0 in it, multiple software, and lot of basic configuration. I don't have any ...
TPS's user avatar
  • 2,481
2 votes
1 answer
2k views

mysql replication not working

I have two servers A and B I tried to setup replication between two servers for fixed dbs DBA and DBB but it's not working my configurations Tables are not getting updated why?? Master:(/etc/my.cnf) ...
harish.venkat's user avatar