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.

learn more… | top users | synonyms

2
votes
1answer
857 views

pg_basebackup: could not get WAL end position from server

I want to create a Base Backup with the pg_basebackup tool of postgres 9.1. After some seconds I receive: `pg_basebackup: could not get WAL end position from server What can be the reason for this ...
1
vote
2answers
299 views

replicate an existing chef node

I have a VM (hosted "in the cloud") that has been provisioned with chef using my organisation's own chef server. I would like to replicate that VM locally (using a vagrant managed VM), in order to do ...
6
votes
4answers
819 views

Is GlusterFS a good pick for keeping webservers in sync?

I've got 2 webservers, with the chance of having to add more servers along the way. Right now I keep these servers in synch using lsyncd + csync2. It works well performance wise because all files are ...
1
vote
0answers
114 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 ...
-2
votes
1answer
111 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 ...
3
votes
6answers
6k views

Oracle real time database mirroring

Does Oracle have any built-in features to support a master-slave mirroring mechanism ? I am looking to mirror/replicate the production server on to a read-only database. The read-only database would ...
1
vote
1answer
45 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 ...
2
votes
2answers
1k views

Can I replicate data between mySQL and SQL Server/SQL Azure?

I have a replicated mySQL setup running happily on Amazon AWS, making user data available locally in various regions. Now I'm faced with an app that needs to go up on Microsoft Azure and I need to ...
2
votes
1answer
136 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 ...
1
vote
1answer
580 views

MariaDB replication not auto reconnecting

I've got a simple master-slave replication setup amongst two MariaDB 5.5 servers. The connection between the servers is somewhat flaky, causing disconnections every now and then. However ...
1
vote
1answer
1k 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 ...
2
votes
1answer
75 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; -> ...
1
vote
1answer
72 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
votes
1answer
340 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 ...
0
votes
1answer
177 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 ...
2
votes
1answer
188 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 ...
0
votes
0answers
222 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 : ...
1
vote
0answers
85 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 ...
5
votes
2answers
15k views

Why is GPO Tool reporting a GPO version mismatch when the GPO version #'s do match?

Any ideas why the group policy diagnostic utility GPOTool would report a GPO version mismatch between two domain controllers if the version numbers are a match? Policy {GUID} Error: Version mismatch ...
0
votes
1answer
150 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 ...
1
vote
1answer
287 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 ...
1
vote
1answer
343 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 ...
1
vote
2answers
3k views

SQL 2008 R2 replication error: The process could not connect to Distributor

I have two servers running SQL 2008 R2 Standard, each with an instance named "MAIN". I have a small test database on my primary server (one table, 13 rows) that I want to replicate to a second server ...
1
vote
2answers
353 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 ...
1
vote
1answer
784 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 ...
0
votes
2answers
7k views

Exchange 2010 don't see its PDC (same machine)

I have two 2008 R2 servers which should replicate AD. One si production server, second backup. On primary server is also Exchange 2010. There were plans about a year ago to install exchange to backup ...
0
votes
1answer
131 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 ...
2
votes
2answers
4k views

How do I configure DFS replication using the command line?

I'm in the process of making a script to automate DFS creation and replication for an exam I have next week. So, assuming I have a namespace: dfsutil root adddom \\Foo\bar 'My namespace' And I ...
2
votes
1answer
129 views

Remove a secondary from a mongo replica set without triggering re-election?

I had to add a new secondary node to my replica set yesterday so that I could do maintenance on another secondary node. Now that the maintenance is complete, I'd like to remove one of the secondaries ...
1
vote
2answers
487 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 ...
4
votes
2answers
4k 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, ...
0
votes
1answer
325 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 ...
2
votes
1answer
114 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 ...
0
votes
1answer
158 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, ...
1
vote
2answers
100 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 ...
1
vote
1answer
172 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 ...
0
votes
3answers
116 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 ...
-3
votes
1answer
327 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 ...
0
votes
1answer
49 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 ...
-1
votes
1answer
51 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 ...
0
votes
1answer
280 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 ...
2
votes
1answer
315 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 ...
3
votes
1answer
1k 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 ...
1
vote
0answers
150 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 ...
1
vote
1answer
357 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 ...
0
votes
3answers
177 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 ...
2
votes
2answers
123 views

What's the most convenient method to ensure that PostgreSQL 9.x hot standy replication is still functioning properly

Assuming that I've got it hot server replication all set up nicely, what's the easiest or most convenient steps I can take periodically to ensure that the hot server replication is still working fine ...
7
votes
1answer
334 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 ...
0
votes
1answer
65 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)
0
votes
3answers
871 views

Group Policy not replicating - Server 2012

I have 2 DCs. Both are Server 2012. For some reason Group Policy does not replicate between them and the client keeps getting : The processing of Group Policy failed. Windows attempted to read the ...