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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SAN Synchronous Replication and SQL Server - Is RPO of 0 possible?

I am working on a solution that is using SQL Server 2012 SP2, but without the use of AlwaysOn availability groups. This is due to cross-database transactions, that does not work for this scenario. ...
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33 views

MySql Replication Stored to Central Database

Hi I maybe looking with the wrong terminology. But i have a situation where i need to replicate / copy data to a centralized database. Shop1.dbshop - > Central.dbshop1 Shop2.dbshop - > ...
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1answer
26 views

New NTDS connections on a site: Need order of operations for local and remote sites

I have two AD sites: Hub and Spoke. ISTG is turned off for both of them, and a new DC is being placed in to the site with no ISTG enabled. What is the correct order of operations to set up manual ...
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23 views

How to create simple file replication on Windows Server 2012 [closed]

I would like to create a file replication between two servers. Both servers are connected to a router which bonds them. That means they have the same IP address. If a client accesses the IP address ...
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2answers
41 views

what distributed file system for a two-node failover setup?

I'm trying to set up a redundant setup consisting of two servers that have everything redundant: the database (MySQL master-master in active/passive mode) the file system (distributed/replicated) ...
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22 views

What database am I seeding from in a stretched DAG?

I have a stretched DAG across 2 sites, with 4 copies. One of the remote copies failed, and I issued a re-seed operation with the remote&working copy as a source. Knowing this, I tried to work ...
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1answer
15 views

Factors and approaches for migrating AD across disconnected Data Centres?

I need to specify an approach for migrating a Windows 2008 Active Directory environment to a new data centre. There is not currently connectivity between the two data centres though that could be an ...
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1answer
55 views

What's the best way to sync folders across 03 or more webservers? [closed]

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but ...
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16 views

Does having an extreamly high number replication partners in Active Directory pose an issue in 2014?

I'm consulting a network where they have 5 domain controllers in central location and a lot of Read Only controllers in additional locations. SCOM is shouting that there are extremely high number ...
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29 views

Hyper-V Replication of VMs with Symantec Endpoint Protection Manager and Symantec Mail Security

I'm hoping for some advice on replicating Hyper-V VMs which are running Symantec Endpoint Protection Manager (SEPM) and Symantec Mail Security for Microsoft Exchange (SMSMSE). The problem is the large ...
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1answer
17 views

Do I need to run db.repairDatabase() on every mongod?

I'm handling a MongoDB (2.4.10) sharded cluster that has only 1 replica set till now. I ran db.repairDatabase() on a mongos. With that, I could reclaim free space on the primary node. But not on the ...
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38 views

OpenLDAP syncrepl probblem with password policies

Recently I have been working to get slapd syncrepl working using an LDAP backend (push based replication). While I have had fantastic results with syncrepl doing pull based, the push based is killing ...
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1answer
118 views

How can I set up an Amazon RDS for PostgreSQL database to act as a replica to a non-RDS PostgreSQL database?

I'm trying to set up an PostgreSQL database on Amazon RDS as a replica to another PostgreSQL database that lives on a regular server. Most of the instructions I've found online require shell access so ...
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1answer
33 views

Testing for Active Directory Schema modification (not upgrade)

I am trying to test a schema modification. That is i need to add one of the attributes to global catalog by modifying schema , initially in a lab which is exact replica.My questions are below; -> ...
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1answer
56 views

Replicate data across loadbalanced apache nodes

I am using haproxy that is pointing on 5 apache nodes, the problem is that I want to replicate apache data between those nodes. I have installed DRBD and it worked but on 2 nodes only The rsync is not ...
2
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1answer
65 views

DFS-R broken after renamed upgraded member server

I had an existing 2-way DFS-R replication topology set up, consisting of two servers, one was Windows 2003 R2 and the other Windows 2008 R2. This was working fine. Last week I upgraded the Win 2003 ...
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1answer
68 views

How to replicate web site files to web servers over WAN for LB sites?

I am working on a new setup for a a handful of websites of mine. My side business is growing (web hosting and light webdev) and I am working on a new infrastructure design using commodity hardware ...
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1answer
43 views

Exchange Local Continuous Replication - Seeding Fails

When setting up Local Continous Replication on an Exchange 2007 server's larger database, the wizard consistently fails with a message along the lines of: The log file xxxx for SERVERNAME\Your ...
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1answer
48 views

What type of AD replication is needed for a non-mesh Hub and Spoke network?

I'm having AD replication issues (OUs not replicating, FRS, etc) and suspect the issue is that the network admins have modified AD Sites And Services in ways that disabled the ISTG and other aspects. ...
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60 views

mongodb replication with admin authentication

I have three nodes of mongodb replication set 2 servers have the data and the third is an arbiter 54.83.20.44 : 27017 (primary) 54.197.243.55 : 40000 (secondary) 23.21.148.73 : ...
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33 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 ...
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44 views

DFS Replication Manager on Failover Cluster Nodes

I currently have a VM architecture setup for high availability / manageability. The one point of failure is that I have a single windows 2008 machine that runs DFS replication across the servers in my ...
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1answer
42 views

Using Replication for Migration on MongoDB

I'm interesting in using replica set feature on Mongo as a method for smoothly migrating between machines. My Mongo database is currently a standalone instance. I realize the recommended practice is ...
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1answer
84 views

Postgresql replicas stuck in recovery (archive_command won't run on replicas)

We're currently running a master -> slave, slave, slave, slave set up using postgresql 9.2.8 with streaming and WAL-E/S3 for handling wal segments. Should all of the replicas currently be "in ...
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0answers
65 views

DFSr detected that a file was changed on multiple servers, but “winning” file and that moved to conflicts folder have same hash

We've just deployed a new DFS replication system between two Windows 2012 R2 servers. We cloned the DFSr database using MS's recommendations ...
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2answers
78 views

Check if MySQL Replication is in sync

The MySQL documentation about CHECKSUM TABLE is very minimalistic. My question: Is CHECKSUM TABLE a good way of checking if a MySQL Slave Table is in sync with the master? In other words: Can i use ...
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1answer
197 views

PostgreSQL master constantly demoted by pacemaker with repmgr

I'm in the process of setting up a PostgreSQL 9.2.8 cluster made of 2 nodes, one master, and one slave. I use streaming replication and repmgr 2.0. My platform is RHEL 6.3. Master and slave can be ...
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1answer
35 views

Do I need to manually promote a replication node to Primary after a Primary node failure?

I have a basic 3 member MongoDB replication set. 1 x Primary 2 x Secondary A = Primary B = Secondary C = Secondary The Mongod service on the Primary stopped, and as expected, one of the Secondaries ...
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241 views

How to setup Dovecot Replication via TCP with PAM user/passdb?

When setting up dovecot to do replication, not usins the "args = setcred=yes" line causes replication to fail with "dovecot: doveadm(lzane): Error: sync: /var/run/dovecot/auth-userdb: Configured ...
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2answers
114 views

Can't get AD inter-site replication to work over VPN

Background: We have a single-forest single-domain AD for our little company. We have two geographically separated sites with different subnets. Both sites have been added as sites with appropriate ...
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2answers
304 views

How to force active directory replication from one DC to another

I am having issues replicating AD from one DC to another. Both servers are Windows Server 2008 R2 SP1. I have used the GUI option in sites and service to force replication. I have also tried repadmin, ...
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1answer
52 views

MySQL: Does sync_binlog 0 delay replication?

If we set sync_binlog to 0, which can delay the OS syncing the binary log to disk, does that introduce any lag into the time it takes for slaves to replicate those binary logs? In other words, are ...
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1answer
36 views

SQL 2008 R2 replication with Oracle DB Server Issue

I am configuring replication between SQL 2008 R2 & Oracle DB server. Getting below error "ORA-01830: date format picture ends before converting entire input string (Source: MSSQL_REPL_ORACLE, ...
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1answer
46 views

Windows 2012 BCD process to boot from replicated LUN for Boot from SAN

For our infrastructure we have a production site and a disaster site with SAN-based replication for the LUNs on the Windows servers. So for our proof of concept we have one server on the production ...
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2answers
67 views

MySQL Replication threeway

We have MySQL Multi-Master replication setup between two servers ( A & B ). It has been working for a few years now and life is good. The management tool in our office connects directly to ...
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89 views

Secondary domain controller not converting to primary Server 2012

I was running my AD DS and DNS on an evaluation copy of Windows (let's call it old server). It was getting restarted after every 1 hour. So I installed a new machine with licensed version and created ...
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1answer
58 views

assign an OU to a certain RODC

I have a RWDC(A) and two RODC(B and C).i create an OU for each branch in RWDC however the OU and it's content will be replicated to all DCs within the domain. So I want to know can we assign an OU to ...
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1answer
101 views

Building a Windows Server 2008 R2 (DNS, DHCP, AD, etc…) [closed]

I'm looking forward to build my own Windows Server 2008 R2 machine for a company that is in the process of establishment. I have some questions regarding the Windows Server. I'm pretty new to it .. I ...
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3answers
69 views

Setup replication from one local disk to another local disk ( Ubuntu )

Is there is are some way to setup local replication of the one disk to the another ( Ubuntu ) in the such way that all read operations will be involve only first disk ? Such configuration will be very ...
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57 views

Unison and Resolving Conflicts with diff3

I installed Unison because I wanted a two-way synchronization to my DRBD directory, my logic is a little bit complicated so I am stressing on the problem itself and ignoring unneeded information, ...
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1answer
45 views

MySQL Dual-Primary Replication

I have 2 identical up to date dedicated MySQL servers and I just configured dual-primary replication on both, everything works as expected but the problem is that I have a lot of BIN files with very ...
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1answer
38 views

Stopping both hyper-v replicas from booting

Consider the following hyper-v configuration: host1, running guest1 host2, running guest2 guest1 replicated using hyper-v replication to host2 guest2 replicated using hyper-v replication to host1 ...
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1answer
52 views

How to translate from statement-based to row-based replication in MySQL

I have a production system that uses MySQL statement based replication for hot failover should a master database die. Running version 5.5 Percona. I have to use statement based replication for reasons ...
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1answer
151 views

Postgresql WAL-E - Replication falling behind + can't catch up

Does anyone know how I can have my replications process the WAL segments faster while using WAL-E? https://github.com/wal-e/wal-e I have one master that leverages WAL-E to upload to S3, and I have 6 ...
2
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1answer
357 views

Postgres replication falling behind - master -> slave, slave, slave

I currently have 1 master server (a) and 3 replication servers (b, c, d) that come directly from the master, the archive_command I use is the following script: https://gist.github.com/Geesu/8640616 ...
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87 views

Does windows DFS (DFSR) resume a partial transfer if a WAN link is lost?

Q: Does windows DFS (DFSR) resume a partial transfer if a WAN link is lost? This seems like an obvious "yes" but, hoping someone here can provide a definitive answer. Background The environment ...
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1answer
93 views

Need to DUPLICATE HTTP requests to two servers

We're developing an new server to replace an old one, and want to put the side by side for before & after tests - so that we can compare the end result and find the discrepancies. The input to ...
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3answers
82 views

Remote access forbidden (HY000) to specific mysql client

A MySQL server is located at central.hwcharts.com; it is the master of a basic master-slave replication which replicates toward host0.hwcharts.com, located on a different physical machine which ...
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1answer
150 views

one of the single dc per domain DCs has suffered USN rollback

I've inherited an Active Directory forest that is laid out very badly. It has a single forest with a domain tree for each site, each with a single domain controller. No domain is a child of any ...
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1answer
16 views

Is it possible to replicate the _users database in CouchDB?

Is it possible to configure replication between the "_users" database on two instances of CouchDB? (currently using 1.4)