Questions tagged [replication]

Replication is the process of sharing information so as to ensure consistency between redundant resources, such as software or hardware components, to improve reliability, fault-tolerance, or accessibility.

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Openldap mirror mode not working

I have two openldap servers running v2.4.57 on Solaris. I'm trying to setup replication. The first system, France, is setup and running. I then created Spain and ran ldapmodify on Spain using this ...
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mongo secondary node - weird log entries

I have mogodb cluster with 4 nodes, all nodes work on standard 27017 port. I found weird things in my mongod.log on a secondary node: {"t":{"$date":"2022-03-26T23:22:34.593+03:...
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Restore hyper-v VM from HRL file

We have been hit by ransomware and some of our Hyper-V image has been encrypted (primary & replica server). The one that didn't get hit, the client OS (Windows Server) was still running but almost ...
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MySQL 8 replication via non-ssl connecion

I'm trying to setup tiny master-slave environment with percona-server-server.x86_64-8.0.27-18.1.el8. A plan is to use non-ssl connections between the nodes as the servers will communicate in the LAN ...
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Replicating filesystem Samba and Windows

I'm looking for a way to create a replicating filesystem between Samba and Windows. I thought that DFSR would be the answer but Samba doesn't support SYSVOL replication. I also looked at syncthing ...
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Stretch Cluster File Server with Storage Replica - Partnership not reversing on failure simulation

First off, sorry if this is the wrong place to post this. I have a Storage Replica setup running in a MSCS Stretch Cluster configuration, two sets of two VMs with each set running on a separate ESXi ...
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MySQL replcating huge changing data

Hi I have a master MySQL server with 950 gb of data and slave has stopped for some reason and there is a difference of 80gb of data. so I started to setup new slave . Since the data is changing and ...
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How to send a single parent ZFS filesystem snapshot and all its descendents' same snapshot to a new pool?

If we zfs snapshot -r tank@20220129, all sub-filesystems also get that snapshot. How to send that single snapshot of tank with all sub-fs's to a new pool (no historical base of snapshots)? While zfs ...
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openldap master/slave replication configuration return TLS error from slave

I am trying to add a TLS secured replication between a master and a slave ldap server. The replication without TLS work well. I encounter this error from the slave : slapd_client_connect: URI=ldap://...
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Mariadb replication - Ignore users changes

I need to set up multi-source replication (3 masters and 1 slave). Since all masters have users with the same name but not the same rights, I'd like to avoid replicating users' changes on the slave ...
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Two PDCs, two ADs, two domains - how to replicate one domain/AD to the other?

Here's the history: SERVER2 was a 2016 Essentials Edition server, standalone with no other DCs. The OS became corrupted in a few areas, and so a decision was made to replace it. A standalone clean ...
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Allowing untrusted clients read-only replication of public data in a redis instance?

I've got a database of publicly auditable votes, updated in real time in a redis instance. Nothing else is in that redis instance. It has been separated from related data in a second redis instance. ...
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Mariadb multi-source replication - Table doesn't exist

I'm setting up multi-source replication with Mariadb 10.6 servers. I have 2 mariadb servers with databases that have the same name "database". I want those two servers to replicate their DB ...
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Mariadb xtrabackup_binlog_info location

I want to set up replication on my existing Mariadb 10.6 servers. I backup the databases automatically everyday with a custom script. Basically, it runs the following command : mariabackup --defaults-...
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Should replica DB be in 'recovery' - PostgreSQL

I have two databases that are using streaming replication and appear to be in this state postgres 16319 0.0 0.5 137949952 3077260 ? Ss Aug22 0:11 /usr/pgsql-12/bin/postmaster -D /var/lib/pgsql/...
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How to replicate growing files?

I need to replicate a bunch of continuously growing large log files from a network file share. Can't use rsync, because I don't have ssh access to the server. Is there any existing Linux tool that can ...
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MySQL not saving to separate data directories

Lately I've been struggling with MySQL and it's data directory a lot. At first, I've tried docker for multiple instances but our company doesn't prefer docker no one knows why. So I come up with a ...
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mirror cluster replication software

I'm looking for an alternative to the safekit software which handle high availability using active/passive redundant servers with real-time replication and failover. Actually we have 2 distant servers,...
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How to debug Hyper-V replication issues

We are hosting some VMs that are virtualized with Hyper-V. For these we have set up replication which works fine in the beginning but starts to fail pretty soon. The error it shows when looking at the ...
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Master DB latency with AWS RDS cross region replication

I have my app setup in 3 regions (EU, AP, US) and the master MySQL RDS resides in eu-west-1, with read replicas in the other regions. This works great for read queries, with the region specific app ...
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AWS EC2 MySQL Replication: Config To Query Slave From Master

I have successfully set up a MySQL master-slave situation on separate AWS EC2 instances. The slave is running and is successfully replicating the master. So far so good. Now I want to be able to query ...
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Having problems demoting DC

I need to cut loose some 2008R2 DC but Active Directory Domain Services Installation Wizard fails because "Active Directory Domain Services could not transfer the remaining data in directory ...
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hyperv replica multiple sites

I wanted to know if that is possible with a hyper-v replica before I start with the implementation. I have 3 sites hosting 3 stand-alone hyper-v servers (acting as primary) and I wanted to set up a ...
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ApacheDS: Multi-Producer Replication example config?

The Apache Directory replication documentation gives an example of Producer-Consumer replication. The same page also indicates that Multi-Producer replication is supported, but I've failed to find any ...
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AD LDS (ADAM) replication error 5 - Access is denied

We have two domains - Prod & QA, we have one way sync between the two forests. Requirement is to setup a AD LDS instance between Prod (Master) & QA(Replica), the RPC & AD LDS ports are ...
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OpenLDAP replication error

I have 2 OpenLDAP servers with replication activated and everything used to work fine. A few days ago, the "replica" account's password expired. And since then I was unable to make ...
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2nd lvl slave can't conect to 1st lvl slave mysql replication

Simple exercise but not working. Help me plase. Context: Lptp1, Lptp2 -> Ubuntu20.4 both Lptp1 dbmaster, Lptp2 dbslavetwo, Lptp1 dvsubslave -> all Ver 8.0.24 for Linux on x86_64 (MySQL Community ...
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How to Mirror MariaDB schema into Mysql? [closed]

We are using MariaDB for our main service and Mysql on another for our ATM machines, I trying to fetch all the data and to have all the transactions available. I don't know if this is possible because ...
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Data missing after ZFS replication on FreeNAS/TrueNAS

In order to use the new encryption method in TrueNAS 12 I copied all data from a legacy encrypted FreeNAS pool to a newly formatted pool via a replication task. After replication there seems to be ...
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Upon running repadmin /replsummary more than 15 servers are showing "8606" error

We are having an issue with Error ID "8606" ( Insufficient attributes were given to create an object. This object may not exist because it may have been deleted and already garbage collected)...
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keepalived delay before bringing ip up

Is it possible to configure a delay before bringing the virtual IP up in keepalived? Background: I have multiple Master/Master MySQL Setups. Only one Master is used at time. Keepalived is used for VIP ...
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Storage Virtualization/Replication for KVM Live Migration on 2 Nodes

at the moment I'm doing some researching on Virtualization on Linux. My target scenarion would be a 2 Node "Cluster" with replicated storage over IP. (a little Like Windows HCI) I already ...
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How to setup a master-slave connection with an invisible master? [closed]

I know, the question may sound weird at first but let me explain some things, I'm sure you will understand my problem after that: I have a raspberry pi recording all data from my weather station at ...
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Prevention of replication in Azure blob storage

I have a ton of Azure storage accounts. I would like to prevent any of my users from replicating data to a storage account outside the subscription e.g. they can replicate to another region for the ...
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VMware to Azure Site Recovery; disable replication failed:

I have a VM that I am replicating to Azure from a VMWare host. I needed to change the hard drive type to SSD Premium, and so started a disable replication, so that I could re-replicate. The disable ...
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Replication Working in AD

I recently studied the concept of replication in Active directory. My doubt is, which one initiates the replication? For example, I had DC-1 and DC-2 server. I update the user object's name attribute ...
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How can I transfer a dedicated bare metal server into a VM?

I have the following problem: We have a dedicated (bare metal) hardware server (Debian 10) on which we have no direct physical access. Now I want to transfer all data and applications that are on this ...
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How does one go about using master to master replication along with something like rsync to keep two identical copies of an application identical?

I have servers that do things for me at home, for instance they keep copies of my bookmarks in the way that del.icio.us used to (nextCloud) and keep copies of my code (gitea). Initially I thought that ...
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Numbers of bricks is not a multiple of replica count - glusterfs

I have 10 servers and want to use all as storage so tried to create volume with following command but its throwing error gluster volume create gv0 replica 3 server1:/data/brick1/gv0 server2:/data/...
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Mixing Galera and MariaDB/MySQL replication

reading about it online, it appears we can use both Galera replication and native MariaDB/MySQL replication together. Can anyone confirm that this is correct? I'm thinking of a scenario where Data ...
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What are the steps to re-enable replication if replica-server lost the replicated vms?

We just lost our logical drive for a few replicated VMs and couldn't restore them. Now we ran into the issue that we can't re-enable the replication process on the primary Hyper-V Host. We get the ...
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OpenLDAP syncrepl does not recover after network interruption

We have an issue we have discovered where syncrepl does not recover after a network interruption. Environment: Centos 7 replicas OpenLDAP 2.4.44(-21.el7_6) Loglevel set to comm sync (produces nothing ...
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Problems with MySQL replication. Why binlogs grows so fast?

I have 2 MySQL servers: Master server: mysql version 5.7.14 Slave server: mysql version 5.7.14 in Docker container (from official docker hub). GTID-replication. I have two problems: Binlogs growth ...
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MariaDB/MySQL DB tracking another database

If I want to have two servers with one active and one hot standby (and each has it's own database on them), how do I get the secondary to track the primary and be quick/easy to deploy if the main ...
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7 votes
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Replicating storage efficiently

I want to replicate in the region of 10Tb of data (lots of smallish files, low level of churn) across a WAN with minimal impact on the available infrastructure. While I could simply use rsync, this ...
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Hyper-V Replication without Domain

I have a hyper-V host in a different DC that I want TWO source servers to replicate to. I have followed guides such as https://michaelfirsov.wordpress.com/hyper-v-replica-in-windows-server-2016-...
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ActiveMQ Artemis: Message draining without HA policy "scale-down"

In an ActiveMQ Artemis HA cluster (v2.13.0), the HA policy’s <scale-down/> property causes the backup broker to move all pending messages to one of the remaining live instances if the master ...
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Impossibile to replicate MongoDB

we are trying to move a MongoDB from an AWS VM to an on premise machine. The MongoDB data directory size is over 2.5TB. The idea is to put the on premise VM in replica with the AWS VM. The problem is ...
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How to use real time file replication on linux

So, we are in 2020 and many of the answers from similair questions might be outdated. What is the best way for real time file syncronization between linux servers. It's serveral million small json ...
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DC's storming me with issues

Hi I have 2 DC's (server 2019) (1 physical, 1 Virtual) was working good, but last month I did notice some issues like I couldn't connect from dc2 to dc1. so I opened Event Viewer to find muliple ...
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