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.

215 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5
votes
1answer
4k views

Redis Multi-Master Replication

Scenario: We have two datacentres which run concurrently (both serve traffic). Each has it's own entire stack of infrastructure, so it can operate without the other being up. That said, we would ...
4
votes
0answers
275 views

Copy nginx cache between two servers

I have a nginx caching server with at least 2tb of cache files at any moment, i need to migrate this server to another hosting provider but none of my clients can handle that traffic without cache. ...
4
votes
0answers
987 views

IIS Content and Configuration Sync

We have a Web Farm with IIS 7.5 that has a 3rd party application that syncs IIS Content and Configuration. We used this back in IIS 6 days, when there were no tools in the OS that handled this easily....
4
votes
0answers
461 views

all dfs replication groups failing at the same time

We have 2 pairs of fileshare servers. All servers are virtual Windows 2008 R2. Each pair is replicating over a WAN. Occasionally all DFS replication groups fail at the same time. I could not find any ...
3
votes
0answers
166 views

On-prem Hyper-V VM replicate to Azure

So I have a question. I'm used to replicating my VMs to azure using site recovery. Im now facing an issue with one of our clients having a very slow upload speed and needing to send the initial copy ...
3
votes
1answer
902 views

remote Powershell script Scheduled task

I am having trouble running a Powershell script as a scheduled task. The script remotely logs into two Hyper-V hosts, queries the replication status and emails the result back to me. The script works ...
3
votes
0answers
428 views

combine two mysql replication log files

So I use a master-master replication of a mysql database and load balance traffic between the two. This results in server A with a binlog of all it's transactions and Server B with a binlog of only ...
3
votes
0answers
478 views

Solution for file data backup, versioning and replication

We have a growing set of data files (.wav files, image files etc) which are data, i.e not part of the application code - uploaded and modified by users. The number of files is in the 1000s and the ...
3
votes
1answer
2k views

mongodb keep looping while trying to sync data

I'm converting my my standalone mongodb into a replica set. I've added one more member (and I want to add two more members later, and to shutdown the primary server). My primary mongodb is running 2....
3
votes
1answer
4k views

Large lag on mysql replication (Relay_Log_Pos and Exec_Master_Log_Pos does not increase)

Today my two slave's (one mysql 5.1 and second MariaDB 5.5, master is mysql 5.1) started lagging. Similar situation are quite often with lags rises to even 10000 seconds, because slaves have worse ...
3
votes
1answer
5k views

Read Only Domain Controller not replicating after writable domain controller outage

I have a RO domain controller that replicates with a writable DC which is at another site. The other week the writable DC was out for about 2 days because of maintenance at that site. After this ...
2
votes
0answers
132 views

AD Replication error: lingering objects in DomainDnsZones

I manage a small environment (single forest, single domain) with only two Ws2008 R2 DCs. Recently I started having replicationg issues from DC01 to DC02 due to lingering objects in naming context DC=...
2
votes
1answer
49 views

Hyper-V Replica from windows 2012 to windows 2008

My Customer has two hyper-v foc with san storage. one is built on windows 2008 datacenter and the new one is built on windows 2012 datacenter. can I make a hyper-v replica from a windows 2012 hyper-v ...
2
votes
1answer
756 views

Why are GlusterFS replicated volumes not recommended for Hosts in different datacenters?

Any tutorial I can find about GlusterFS replicated volumes assumes that both (all) bricks are on the same private network which then also leads to the conclusion they must be in the same datacenter. ...
2
votes
0answers
517 views

Dovecot dsync replication setup

I'm using dovecot with master/master replication using dsync, and I did the setup as described on https://wiki.dovecot.org/Replication What is total unclear to me, and I could not figure it out ...
2
votes
0answers
698 views

Postgres-Repmgr node is marked as inactive after reboot

I'm using using a cluster with 2 psql servers. I'm using repmgr to manage replication and failover. Replication works fine, and when my master fail, the standby takes the lead. My problem is when I ...
2
votes
0answers
2k views

GPO says Version Mismatch on Domain Controller when Versions appear to Match

On my primary domain controller, the AD and Syslog version of each of my GPO policies appears to match correctly: However, when I run a Group Policy Results report, it says that their is an "AD / ...
2
votes
0answers
108 views

Server 2012 replication error

I have 2 Windows 2012 DCs (DC1 and DC2). From DC2 replication works while from DC1 I keep getting the error "replication error rpc server is unavailable. I'm attempting to do this from Active ...
2
votes
0answers
624 views

Postgres streaming replication over Internet

all: I want to set up two PostgreSQL servers, one as master server and the other one as a hot standy, using streaming replication. I have done this before in LAN environments, but I would like to ...
2
votes
0answers
362 views

glusterfs unable to read gsyncd status file

Goal I wanted to try glusterfs geo-replication in some virtualboxes on my computer for later use distributed on multiple sites. Configuration I installed glusterfs 3.6 on ubuntu 32bit servers like ...
2
votes
1answer
6k views

Server with multiple replicate=do-db entries

I have a server that someone has setup which are acting as a master-master on both servers. Since they have been configured as both master on the same database, changes in one end has caused all sorts ...
2
votes
0answers
195 views

Hyper-V Replica Capacity Planner stuck getting VM information

I'm trying to use the Capacity Planner for Hyper-V Replica tool to estimate requirements for a replica site. It keeps getting stuck "Getting the VM and VHD from primary site, this can take upto ...
2
votes
0answers
490 views

What can be done to prevent “failed to flush master info” in MySQL replication?

I have two MySQL 5.1 servers setup with master/slave replication. I was previously using 5.1.41 for several years without issue. However, since I've upgraded to 5.1.72 (and did some other tweaks ...
2
votes
1answer
1k views

glusterfs mounts get unmounted when 1 of the 2 bricks goes offline

I have an odd case where 1 of the 2 replicated glusterfs bricks will go offline and take all of the client mounts down with it. As I understand it, this should not be happening. It should fail over ...
2
votes
0answers
1k views

Openldap Mirror Mode replication failover

We have currently one master ldap server and around 400 slave servers which are partially replicated through that master.All openldap versions are same and 2.4.31 What we want is actually if master ...
2
votes
0answers
9k views

AD Replication Errors / KCC - Between two Domain Controllers

I'm having quite an issue that began a few days ago. Let me just lay out exactly what happened - also I've inherited this environment, please keep that in mind. 1st Domain Controller - Windows ...
2
votes
1answer
188 views

Using TrueCrypt with File Replication on Windows Server

We have a few folders that are set to replicate to a DR file server off-site. One of these folders contains a file that is a TrueCrypt volume container. When this file is mounted in TrueCrypt, the ...
2
votes
2answers
227 views

System Requirements of a write-heavy applications serving hundreds of requests per second

NOTE: I am a self-taught PHP developer who has little to none experience managing web and database servers. I am about to write a web-based attendance system for a very large userbase. I expect ...
2
votes
1answer
149 views

For a simple replication over 2 server computers, should I use glassfish replication or ubuntu replication, or something else?

I want to set up a simple replication or exact mirroring, using 2 server computers I just bought, for the following purpose: I want to set up some websites, which, by design, may eventually need to ...
2
votes
1answer
108 views

What options for Windows Server 2008/SQL Server 2008 replication/mirroring across data centres?

Our Microsoft web-application processes around 2000 orders per day. I need to support failover to a secondary data centre. What are the options and experience of implementing a replication/mirroring ...
2
votes
1answer
185 views

Replicate the same source folder to multiple end points, with a different schedule for each end point

I'm trying to make a set of folders (about 8 gig) that get updated monthly to replicate out to nine branch locations. They are connected via VPN back to head office with 1.5Mbit aDSL links. I've got ...
2
votes
1answer
104 views

data replication from a production web server back to the staging web server

Have two web servers, development/staging and production. Code and some documentation is moved from the staging area to production either through on-demand jobs or nightly via a global replication ...
1
vote
1answer
80 views

Backup & Restore OpenLDAP 2.4 with multi-master replication enabled

We have an openLDAP cluster running with two Master(producers) and one consumer. I read the below guides and got a good enough idea about using slapcat/ldapsearch with slapadd/ldapadd to backup & ...
1
vote
0answers
26 views

Proxmox: How to replicate runnable VMs

I am quite new to Proxmox 6.0 and just started to learn clustering. I am running a test environment with an HP Proliant and an IBM rackserver (both have just one fat partition and the dataformat is ...
1
vote
0answers
52 views

Setup Local Persistent Volume on physical machines with Kubernetes

Let me make a statement first: I'm new to Kubernetes, please take it easy if I'm asking wrong questions. Ok, here is what I'm gonna do. I'm planning to build a Kubernetes for my project using some ...
1
vote
0answers
151 views

Converting a file server and Windows File Share to CIFS based share using Netapp Filer

My customer wants to decommission their old Windows Server 2008 file servers. The file shares contain lots of user home folders, group drive and data, application data etc. I would like to implement ...
1
vote
2answers
217 views

MongoDB/ElasticSearch in Kubernetes

I am exploring the Kubernetes toolset and have now my dedicated 3 nodes cluster up and running. Next steps are migrating our company projects to the cluster. As we use MongoDB and ElasticSearch and ...
1
vote
1answer
752 views

Master-Master File Sync between DataCenters

My problem is regarding a master-master (3 master nodes) file synchronization setup, where each node is in a different DataCenter. I have three application servers where users can create/modify/delete ...
1
vote
0answers
292 views

DRBD - Protocol A slower than B and C

I have a simple, not quite so simple question: why the heck is protocol A slower than B and C in my setup? I mean, I've been stuck on this for over a week now, tried "all" the configurations, played ...
1
vote
0answers
76 views

SQL Merge Replication Triggers Missing

In MS SQL Server 2008R2 SP3 Standard, I'm seeing an issue where reinitializing a merge publication with a new snapshot deletes all of the merge triggers from all of the tables, and then when snapshot ...
1
vote
1answer
381 views

Replicate On-Premises Hyper-V VM to Microsoft Azure (ASR)

Below is the diagram of my on-premises site connected to Azure site via S2S IPsec VPN. On-premises and Azure Diagram I got several questions and woul highly appreciate if someone could clarify them ...
1
vote
0answers
31 views

Metadata Replication Process for Active Directory

I'm currently studying Active Directory, hoping to get up to speed on it to help with securing some clusters we are working with. While reading through how AD does replication, I came across something ...
1
vote
1answer
2k views

MongoDB Active-Active Multiple Datacenters

I am looking for a method to configure MongoDB servers across 2 different datacenters where they remain in an active-active configuration. Site A is the normal Production environment that customers ...
1
vote
0answers
488 views

ZFS over LUKS over (NBD or NFS)? Need encrypted replication solution

I am using ZFS(ZoL) over LUKS on home and on remote server. All is working perfectly and fast. I do snapshots by cron, but now I want to replicate them to some backup storage. I have a small 2-HDD ...
1
vote
0answers
774 views

dovecot replication duplicates

I got mailbox on both servers which are connected with eachother for dovecot replication. When mail comes to mailbox only on one server replication works ok, but when there is new mail on second ...
1
vote
0answers
122 views

Delayed synchronization between two AWS ElasticSearch Service instances

I need to synchronize the indexes of two AWS ElasticSearch Service instances once a day. It's really important that the synchronization is NOT real time. The first index (let's call it ES-A) is ...
1
vote
0answers
425 views

Unable to create index on solr, when using Zookeeper

Evening, I've created a what I believe to be a simple SOLR cluster, with Zookeeper (external binaries instead of the embeded). For simplicity, this cluster is: Master: SOLR1 Slave: SOLR2 Both ...
1
vote
1answer
785 views

DNS Active Directory Zone Replication Scope (Forest vs Domain)

When I create a new Domain Controller with dcpromo then the wizard will also add a DNS Role to the server because the first domain controller must be the global catalog server for the forest. After ...
1
vote
0answers
469 views

DFS-style Replication for Samba?

I've been snooping around here for a while, and it looks as if glusterfs might be the answer to my question. However, I am fairly new to this, so a sanity check would be much appreciated! My setup is ...
1
vote
1answer
92 views

Filtered master-master replication-is it possible?

I got task to configure I think some sort of monster. My boss want to have two mysql servers. Let's say serverA and serverB have databases db1,db2,db3,db4. He wanted that serverA will be master for ...

1 2 3 4 5