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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Why is it not possible to mount a replicated gluster volume with one Gluster server?

I am running 2 glusterd on individual machines connected by private network. It apears that I can only mount the bricks if both deamons are up, otherwise it failes. As I am pretty new to glusterfs, ...
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14 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 ...
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1answer
35 views

repmgr - after a failover switch, both nodes act as a master

I have a two node PostgreSQL cluster configured through repmgr. The database topology looks like this: db1 - 10.10.10.50 ( master ) db2 - 10.10.10.60 ( standby ) wit - 10.10.10.70 ( witness ) The ...
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10 views

GluserFS - data out of sync

I have a glusterFS master - slave geo-replication. The data is out of sync and I would like to do a full sync (without having to do the full copy again -> 6.4 TB over network). The glusterFS version ...
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1answer
22 views

Set up keepalived for MySQL Master-Master replication [closed]

I managed 2 mysqld processes that listen for connections on different ports- 3306 and 3307 on localhost. I set up MySQL Master-Master replication. And now I want to set up keepalived for MySQL ...
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1answer
15 views

CouchDB replicate ALL databases?

I have a CouchDB I'd like to replicate to another server in order to do backup dumps without taxing the production server. The production CouchDB has a varying number of databases and I'd like to sync ...
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1answer
43 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 ...
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1answer
24 views

Skip failing statement in galera multi-master: Duplicate Column, wsrep_local_state: 2

After a Schema-Change on which I have missed out to take care about replication, I now have one Server not synching anymore, as it tries to alter the table which already has been taken care of (Server ...
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5 views

MongoDB with ReplicaSet perform updates / compact

I have a MongoDB in ReplicaSet with 1 primary, 1 secondary and 1 arbitrer. I'm doing an heavy update operation on a huge collection (more than 2.5M records), this operation will decrease the ...
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1answer
40 views

Authentication in a Mongo Sharded Cluster

I have a mongo shared cluster and replica sets: The ShardA Replica set: A1. 10.77.14.241 A2. 10.77.14.242 AA. 10.77.14.243 Arbiter Some parameters of /etc/mongod.conf: #bind_ip=127.0.0.1 ...
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2answers
49 views

Is there a difference in bandwidth consumption between a RODC and RWDC?

My organization has deployed 2008 RODCs on multiple seagoing platforms. The idea was to extend our shore-based domain onto our ships to better control security policies. RODCs were selected with the ...
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3answers
51 views

Is it possible to move MySQL to different hosting using replication?

I am considering switching to a new hosting provider and I would like to know if it is possible to achieve database (MySQL 5.6) migration without a huge downtime (= time to copy tens of GB of DB ...
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1answer
19 views

How do you sync ipset sets across two machines?

I would like to replicate IPSet sets from one machine (server01) to another machine (server02) using rsync or btsync or something similar. Is that possible? If so how do I do it? This is a redundancy ...
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1answer
180 views

Can't config replica set using MongoDB 3

I'm trying to create a replica set in MongoDB version 3.04. I followed this tutorial and getting the next error while trying to add nodes using the primary server: vacrep:PRIMARY> rs.add('server ...
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1answer
64 views

MySQL table only replication (Master->Slave)

I've set up two servers (one master and one slave db). I want to synchronize one single table of a whole database live (or with a delay of up to 5 minutes) in only one direction. I wanted to try the ...
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2answers
43 views

How to replicate application in load balanced infrastructure

AWS use AMI (Amazon Machine Image) to copy the application server whenever new node (server) is deployed. How that work ? What sort of image is that ? What are other ways to do replication of ...
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42 views

mysql replication stops without errors

I have this issue with master to master replication setup. Replication stops without errors, but when I make: slave stop; slave start; it is working again. mysql --version mysql Ver 14.14 Distrib ...
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32 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 ...
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2answers
62 views

OpenLDAP proxy : caching credentials in case Active Directory master unreachable

I'm setting up a Debian server in my company where users are managed in an Active Directory. I'd like to authenticate users with AD but I'm thinking it would be better, if feasible, to have a local ...
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2answers
42 views

How to open Hyper-V Manager in Hyper-V Server 2012?

In Windows Server 2012, to open Hyper-V Manager, in Server Manager I would just go Tools >> Hyper-V Manager. How do I open Hyper-V Manager in Hyper-V Server 2012? I want to allow replication to this ...
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1answer
40 views

dfs replication verification

Was wondering if there is a way to verify every single file from the source server is replicated over to the secondary server. I understand there's a command get-dfsrfilehash that can verify the files ...
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1answer
239 views

Server returned 'request expired' less than 0 seconds after request was issued, but it shouldn't have expired for at least 600 seconds

When I click save & restart VMWare Replication Appliance VRM service: Getting this error Error applying startup configuration: Server returned 'request expired' less than 0 seconds after request ...
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1answer
33 views

Cassandra NetworkTopologyStrategy

I would like to configure the following multi-datacenter Cassandra cluster: DC-EUROPE has 3 Cassandra nodes (1.1.1.1, 1.1.1.2, 1.1.1.3) DC-ASIA has 3 Cassandra nodes (2.2.2.1, 2.2.2.2, 2.2.2.3) Each ...
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1answer
40 views

7-Mode snapmirror status post link change

In a Netapp with a snapmirror relationship to another Netapp in 7-mode, what are my options of checking replication performance through Data Ontap? We upgraded the link and want to know how snapmirror ...
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1answer
37 views

MYSQL replication - Security suggestions on replicate over the internet [closed]

I'm going to launch a new web service, but i have few funds to start this business. I was taking a look at OVH Dedicated Infrastructure servers, but such a service costs at least 250 $/month, too much ...
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109 views

Unable to edit Account Options with Delegate AD access (Access Denied)

We allow the IT services in other countries to manage certain parts of their AD/OU via Delegate Control. Under one Country OU, the delegate rights to edit Account Options are no longer working. This ...
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1answer
176 views

Can't connect to MySQL 5.5 with SSL

I am trying to get MySQL SSL replication setup for two brand new RHEL 6.6 x64 servers. I have replication working without SSL, but I can't get it set up with SSL, and can't connect directly using SSL ...
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1answer
212 views

Windows Server 2003 AD Replication error 1864

Quick question on Active Directory replication. The AD topology is simple: Hub site and 10 Branch sites. I have one connection object between Branch "A" DC and Hub DC in Active Directory Sites and ...
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2answers
87 views

Location dependant dns redirection

I have a corporate network with two sites. Each site has its own domain controller with dns service and both domain controllers are servicing the same company.net domain. We have an mpls network set ...
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28 views

Not received replication information orphaned domain controller win 2008 R2

All 3 our domain controllers in 3 different sites keep generating the same active directory error. This directory server has not recently received replication information from a number of ...
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1answer
115 views

When and how should we shard MongoDB when we are bound to physical machines?

We maintain a search service that serves data from MongoDB. Our Mongo production instance is arranged in a 4 node replica set across four physical servers. The database is comprised of several small ...
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1answer
79 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 ...
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1answer
103 views

Mongo secondaries stuck at startup state

I have a MongoDB replica set with secondaries that won't make it past the STARTUP state. The database is large but they should have moved to STARTUP2 by now. The correct ports are open as I can ...
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85 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 ...
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1answer
42 views

Does Hyper-V Replication support memory replication?

Does Hyper-V replication support the replication of memory, or is it just the deltas between disk writes? ie, in a fail over situation would a server with a memory fault have this same memory fault ...
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0answers
74 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 ...
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2answers
133 views

Replicated shared filesystem

I'm looking into setting up a shared filesystem/file server on AWS (EC2) infrastructure that offers replication and fairly painless failover. This filesystem would host potentially millions of files ...
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3answers
214 views

Replicating a linux web server

I'm planning on replicating a web server for high availability purposes. The server is running as a Ubuntu 15.04 virtual machine in Hyper-V and has MariaDB 10.0, Apache 2.4 and PHP-FPM 5.6 installed. ...
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2answers
114 views

LDAP syncrepl with kerberos authentication

I'm trying to set up a replication server for LDAP using syncrepl. I would like to use Kerberos to authenticate the consumer, because we have it set up, and it seems more secure. The database ...
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1answer
90 views

OpenLdap Replication

I have installed openldap on two machines and tried to setup multi-way replication.I am able to perform the multi-way replication (Add/Update/delete) when both the machines are up and ldap is running. ...
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1answer
107 views

Best way to copy file server 2008 r2 contents to a new 2012 r2 server [closed]

I am making a DR site over the cloud and want to upload all my file server contents in the fast and most suitable way. There are many options like; XCopy Robocopy DFS Replication Third party tools ...
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1answer
60 views

Changing tablespace on table with streaming replication

I've been searching for answers for a while know but can't find any reliable source. We have 2 postgres servers that replicates using streaming replication. I now need to move some tables to a ...
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1answer
91 views

Replication not working on DC

I am getting the following error (4612) on my secondary and tertiary DCs: The DFS Replication service initialized SYSVOL at local path C:\Windows\SYSVOL\domain and is waiting to perform initial ...
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40 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 ...
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1answer
275 views

Domain controllers won't replicate

I recently removed a secondary domain controller (forcefully) and created a new one as secondary for the same domain. The problem is, is that the new secondary can see the primary and itself, but the ...
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2answers
119 views

Invalid method Parameter when calling DfsrConnectionInfo->ForceReplication() with WMIC

In our AD infrastructure the SYSVOL is replicated by DFSR. I want to force replication using WMI (ForceReplication method) via WMIC: wmic /namespace:\\root\microsoftdfs path DfsrConnectionInfo call ...
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12 views

Postgres 9.3 maximal cluster size with streaming replication [duplicate]

First, I quote from https://wiki.postgresql.org/wiki/Binary_Replication_Tutorial: In Streaming Replication, the master and the standby have special processes called the walsender and walreceiver ...
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1answer
689 views

Missing SRV record at DNS server

Server 2008R2. 2003 functional level. One of my branch DCs, which we will call BranchDC1, is not registering SRV records in example.com/_msdcs/gc/_sites/_tcp. The DC is marked as a Global Catalog in ...
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1answer
90 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 ...
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2answers
1k views

Is it a good idea to store Docker volumes in glusterfs?

I am currently thinking about migrating some of our servers and apps to a coreos enviroment. One of the problems I see here is the management of persistent data as coreos does not handle Docker ...