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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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Can I replicate an Azure VM while the said VM is still running? or Will the VM stop while replicating?

I have and Azure VM which is quite critical as it is running services. I wanted to replicate that VM. My question is, Can I replicate an Azure VM while the said VM is still running? or Will the VM ...
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1answer
16 views

How to configure clients with two ldap servers : master and slave?

I 've successfully managed to set up OPENLDAP replication : ldap1.mydomain.com ldap2.mydomain.com (ldap2 initiates connection every 10min to ldap1.mydomain.com to synchronize) What I want is that ...
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How ntds.dit domain partition is replicated in Win 2003 server if FRS can replicate only Sysvol folder?

How ntds.dit domain partition is replicated in Win 2003 server if FRS can replicate only Sysvol folder? What replication service takes care of that? Not asking about the protocol (I believe it's RPC/...
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18 views

Lsyncd triple-master setup

I do use lsyncd in order to sync three nodes with two sync sections in the config of each node. If a node1 fails (unreachable) and new files are being added to node2 or node3, when node1 comes back ...
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23 views

SQL Transactional Replication Overwriting Full-text Indexes

Very basic question: I am running SQL 2016 transactional replication to an Azure SQL db. It copies over everything but in doing so, it deletes the full-text indexes which then leads to more issues ...
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2answers
21 views

Replication of Postgresql vice cersa

I have two Linux servers having Postgresql-10 on each of them. On both of them, there is a database, say dbexample, having same schema, table, everything. Both of them are capturing data from an ...
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1answer
19 views

How to synchronize 2 GCE VM instances in an Instance Group on Google Compute Engine?

I plan to setup an environment on Google Compute Engine using Managed Instance Groups. I will be running Linux on the VMs. I am new to Google cloud and am unable to find a method to keep all copies ...
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1answer
21 views

Why is my Syno NAS creating a snapshot each hour instead of one per day?

[Background information] I am running a Synology DS916+ consisting of 4 disks forming 2 storage pools. Storage pool 1 is made up of 3 disks holding all my data on a SHR (Syno Hybrid RAID). Storage ...
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46 views

How to recover from split brain after emergency failover with Hyper-V Replica

I am setting up Hyper-V Replica between two sites for a sorta-high availability setup. I've got everything is working as designed; my only problem is that when I do an emergency failover (force a ...
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1answer
23 views

How do I ensuring cache consistency between two Nginx edges

I have a website with nearly 99% of the content served from a Nginx cache (which is also the web server). To give you an idea around how simple the caching mechanism is, this is my cache key ...
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1answer
80 views

Hyper-v 2016 VM replication between domain and workgroup - no longer working

I have three hyper-v servers on an AD domain, which replicate between themselves nicely. I have two other hyper-v servers which are separate, in their own workgroup, they are being built in my ...
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136 views

Sync of SYSVOL content between Windows 2016 Domain Controllers

I have the following setup: Two Domain Controllers in different sites (both Windows Server 2016) -The sites are permanently connected via a VPN (so the servers can directly reach each other) The ...
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1answer
86 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 ...
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0answers
19 views

aws config with one domain but two instances to read from possible?

This just came into my mind and I wonder if the below is possible? I have a domain www.example.com but the client is all across Canada, would it be a good idea to have a server(including db) in both ...
4
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1answer
22 views

Design Replication between 2 Always On Groups in SQL Server 2012

I am using MS SQL Server 2012 version. I have 2 Always on groups, 1 in DC and another in DR. How can set up replication between a database with in DC and DR. I studied that the Distributed Always on ...
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1answer
110 views

How to Change Replica Set Protocol Version in MongoDB.

I'm trying to change Replica Set Protocol to pv1. I have 5 replica set servers Mongo 3.6. I'm using the documentation from here https://docs.mongodb.com/manual/reference/replica-set-protocol-versions/ ...
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1answer
152 views

lsyncd taking time to sync files

lsyncd sometimes takes more than 15 minutes to sync file from remote server to local server. Latency is fine, probably process to. What could be the further reasons for late syncing ? My lsyncd ...
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0answers
15 views

Gluster: how to setup distributed replicated volume with different size

Say I have 4 servers, each with ZFS volumes. Two servers with 36GB each. And two servers with 60GB each. I want to use glusterfs to setup two replicated volumes between the similar sized ZFS volumes. ...
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1answer
39 views

Retry MySQL replication error instead of skip

I have replication error like Last_Error: Error 'Unknown column .. on my slave, because for some reasons the schema are not the same (we are using statement bases replication). Now, I've fixed the ...
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0answers
69 views

How to create a failover for PostgreSQL logical replication slots?

I want to hook a business-critical part of our application architecture to PostgreSQL replication slots. They work great, but one of my fears is failover. Currently we have a active/readonly failover ...
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0answers
52 views

SQL Server 2016 replication monitor from the slave ( subscriber ) without admin access to the publisher

Question: Is it possible to check the replication status of SQL Server 2016 from the slave ( subscriber ) without admin access to the publisher? We have an SQL Server 2016 which is a slave ( ...
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1answer
38 views

MongoDB - Killed when database disk is full

I'm using MongoDB 3.6.5 (already tested on 3.2 / 3.4) and i have enabled "directoryPerDB" in /etc/mongo.conf. #mongod.conf storage: dbPath: /var/lib/mongodb journal: enabled: true ...
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1answer
44 views

Hyper-V fail-over network replication ports (do i need HTTPS inbound to source server?)

I have replicaton of a local server to a remote server and all is fine (the remote server is enabled as a replica server, with HTTPS inbound). In the event i perform a planned failover to the remote ...
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0answers
75 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 ...
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1answer
75 views

Can't SSH Into Cloud Endure Replicated VM on Google Cloud Compute

I'm having trouble SSHing into a VM I am trying to migrate to the cloud. I used the "Cloud Endure" option from google's migration doc's. I tried yesterday and realized in my LAN the only way to log ...
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30 views

MongoDB service in Mesos using marathon framework

We have MongoDB instances exposed as docker images in Mesos using marathon framework. Currently, the data is housed in a static way(pointing to a specific host mesos-instance-01). However, I wanted to ...
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1answer
45 views

Mongodb: secondary does not become primary

I have a replica set with 2 servers with a data and one arbiter. rs.status() shows that all three servers are connected. But when I stop my primary, secondary server remains secondary and does not ...
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0answers
16 views

Do I need to set up quorum in a 2x replicated glusterfs servers?

I am seeing a weird issue on a 2x replicated glusterfs servers. While all the status and volume info for glusterfs shows correctly set and running and up status; writing on one server is not ...
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1answer
113 views

Hyper-V Reverse Replication

I have a master hyper-v replicated on a secondary server. If the master fails and the secondary takes over, how do you replicate From the secondary to the master?
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1answer
96 views

Wordpress MySQL replication logins

I'm setting up a Wordpress site that is being load balanced across two servers, for various reasons the customer does not want a standalone database server. We've setup Master/Slave replication ...
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1answer
31 views

AD site replication issue

We currently have two sites. It appears that only one DC is being used to do replication between the sites. Is this normal? I would expect this if we had a bridgehead server set up, but we do not. ...
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1answer
54 views

mysql simple master-slave replication stops without any errors

mysql Ver 14.14 Distrib 5.7.21-20 (it's Percona fork, if it's matter). Trying to make simple M-S replication, only 2 servers, different id-s. Replications starts normally, but after a while (several ...
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74 views

Hyper-V Replication Size

We have 2 VM's running Windows 2012 (not R2) in a Windows 2012 R2 Hyper-V Environment. The servers are both on the same host and are both replicated to the same server at a remote site. Both servers ...
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143 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. ...
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1answer
44 views

AWS RDS Aurora (MySQL) Replication design

I hope someone can help clarify the replication of AWS RDS Aurora for me, it states "It has fault-tolerant and self-healing storage built for the cloud that replicates six copies of your data across ...
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0answers
45 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 ...
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1answer
118 views

MongoDB on AWS (EBS): 3 replicas vs. 2 replicas + Arbiter

We have a fairly large Mongo DB running in AWS. Currently, we are running with a replica set with 3 instances. Each instance has 5TB of attached EBS storage. This comes out to over $1000/month per ...
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2answers
245 views

Hyper-V replication between datacentres over WAN

I'm trying to enable Windows Hyper-V replication over WAN. I have (finally!) been able to achieve this in a test environment over LAN using the certificate-based authentication method (rather than ...
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0answers
16 views

asymetric time of AD replication

I'm newbie to MS and AD. I got two domain controllers. First I've created DC1 and then joined to domain DC2 and promoted is as domain controller. When I make some changes on DC1 (DNS entry or new user ...
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1answer
191 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 ...
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2answers
313 views

SQL Server Failover strategies

In my infrastructure I have a SQL Server 2014 Standard standalone server. As databases and applications which are using SQL Server are growing up, I want to upgrade to SQL Server 2016 Standard and ...
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0answers
42 views

cant use bucardo for postgres replication

i have remote PostgreSQL Database in cloud, and local PostgreSQL Database, i did install bucardo to make ASynchronization between the two Databases, and then added the local and remote database ...
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0answers
100 views

Hetzner Dedicated Server problems with ns1

I configured a dedicated server in Hetzner... everything seems to works fine, but I've notice that from time to time the ns1 is not visible anymore, and some dns won't resolve the domain!!. What Am ...
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0answers
52 views

Powershell script file not appearing in domain sysvol on all machines

I've run into a strange problem that I suspect may be related to DC replication. We have two DCs, let's called them domaincontroller1 and domaincontroller2 for the purpose of this question. We've ...
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2answers
38 views

Master-Master replication how to catch up sync if shutdown

for work I was supposed to set up a master-master replication of 2 servers ( raspberry pi 3 debian ), which I did and it works, but now I have come to the issue of why we set up the replicas in the ...
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1answer
92 views

Master/Master and Master/slave replication issues on raspberry pi 3

So for 2 weeks, I've been trying to set a Master/Master replication ( with apache2 web server and mariadb database ) on two Raspberry pi using different methods I've found all over the web ( french ...
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1answer
78 views

MySQL replication not working

I have been trying everything I could find and my servers are not replicating! Can someone look at my config files and offer some guidance? My,ini master on Windows: # Other default tuning values # ...
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1answer
23 views

Replicating folders in docker cluster

So I am quite new to docker, and in particular docker swarm. I've just installed jenkins and I want it to work on all nodes regardless of it running with only one instance on one machine or 10 ...
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1answer
86 views

Scheduled tasks when replicating servers

Currently we have a single server that is serving customers and we've planned to add a new server and setup load balancing and database active cluster, so in this case both servers would act the same. ...
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1answer
167 views

Azure Site Recovery issues with Hyper-V Integration tools

I am dealing with an issue for sometime now which is that Domain Controllers Virtual Machines that are replicated to Microsoft Azure using the Azure Site Recovery service, are failing to take ...