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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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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68 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
163 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 ...
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1answer
444 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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93 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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99 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 ...
7
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1answer
162 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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21 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)
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3answers
225 views

GPO Replication SysVol Inaccessible on Windows Server 2003

In our current AD setup, we have the following Domain Controllers: DC1: Server 2012 R2, Operations Master (All roles) DC2: Server 2012 R2 Mailserver1: Server 2003, Also hosts Exchange 2007 The ...
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2answers
107 views

Is it possible to do mysql replication with one server in internet and another in a intranet?

I have a server in internet that must have all data synced (dont need to be in realtime) from a server from a intranet (obviously has internet connection). Is it possible? How about sync both sides, ...
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3answers
354 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 ...
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118 views

Active Directory replication over VPN - DNS resolution

I have looked around whether anyone had the same issue but so far have not seen anything that would help me. I have a homelab and two VMs (Windows 2k8r2) with public IP addresses hosted in remote ...
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36 views

LDAP Replication

I'm trying to use LDAP Sync Replication. I must grant rights to my account replicador. This is my ldif: dn: olcDatabase={1}hdb,cn=config replace: olcAccess olcAccess: {0}to attrs = ...
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2answers
122 views

Can you sync two different domains on MS DNS server?

Lets say you are running a domain X, but want your internal DNS server to handle requests for both domain X and domain Y such that if machine1.X resolves to a.b.c.d, that machine1.Y would resolve to ...
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2answers
657 views

No SYSVOL\NETLOGON on 2012 STD DC Server

I have 2 2012 servers. I found out there's no share of neither SYSVOL nor NETLOGON on the BDC. I'm getting many 5002: The DFS Replication service encountered an error communicating with partner ...
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2answers
161 views

Issues with LDAP backend in OpenLDAP

Good Morning; After working on setting up an LDAP proxy server to replicate LDAP data, I keep getting the following message: 52a0b5ca send_ldap_result: conn=-1 op=0 p=3 52a0b5ca ...
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2answers
177 views

Unable to Delete User Object in AD windows server 2008

OS - Window Server 2008 ( Domain Controller ) One User Object in AD is Creating Problem as well as i am unable to delete it manually also. Please see the below Error. In Event viewer i am getting ...
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2answers
236 views

Static master in Redis replication

I'm running replicated Redis that includes a master and just one slave. My goal is to implement a replication (using Redis sentinels) in which the slave becomes master when the master goes down, but ...
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2answers
82 views

Secure communication between two hosted dedicated servers? [closed]

I'm planning to host a site on a pair of dedicated servers (both running IIS/SQL Server with SQL replication). Since the hoster only provides a public IP on each machine, how would I secure ...
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2answers
277 views

pg_archivecleanup not found Postgres 9.1, even though it is installed?

I have streaming replication setup on 2 Postgres 9.1 servers. Everything is ok apart from the archivecleanup. In the logs it says: sh: 1: pg_archivecleanup: not found 2013-11-19 09:17:37 GMT WARNING: ...
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154 views

Replication issue caused by bad DNS entry in _msdcs

We have 3 DCs in our domain. One of the DCs died (wouldn't boot) two weeks ago. We performed metadata cleanup to remove the old DC from AD. Then we built a new DC with a new name (we used the same IP ...
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1answer
75 views

replica between dc failed

I have 2 dc windows 2003: one is the master and it is called dc, the other is called fs and it is not synchronized with the master. On the fs server I stopped the service netlogon because I have had ...
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2answers
248 views

postgresql slave to master table replication

I currently have a few dozen sites pushing data to a central database over VPN with rsyslog. All these records are going into one table (there are roughly 20 - 30 per second being inserted per site). ...
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3answers
494 views

Sync directory across two servers using rsync (or alternative for syncing directories)

I have two VMs that should have identical files in this directory: /var/www/owncloud/data/admin/files/ I initially thought that I could use rsync with cron to copy the files every two minutes: On ...
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1answer
34 views

MySQL Replication fix after server shutdown/start

Server1 is Master Server2 is Slave Both are in our AWS testing env and we stop them once done with our work. When start again, Master rotates/creates new binary log file but slave keep looking for ...
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114 views

Changing MongoDB Oplog size

while loading data to mongodb, I keep getting "error RS102 too stale to catch up"... After research I found that my default oplog size for a 32 bit linux machine is too small. I would like it to be ...
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1answer
121 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 ...
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55 views

Setting up MongoDB sharding

Would anyone know how to setup MongoDb with 2 sharding clusters? So it must include shard keys, config servers etc.. All using configuration management tool saltstack
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19 views

Logging Apparently Not Working - Can't Set Configure Replication

I'm using a tutorial to set up a master (single) slave setup. When I run the command show master status; I get Empty set (0.00 sec). I have done a lot of research and believe that the log file I have ...
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1answer
50 views

Server 2012 DFS Replication throttling values

Is there any way, via registry edit or something, to throttle the replication throughput by values other than what is listed in the drop-down menu? I would particularly like a 10Mbps or 12Mbps option. ...
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16 views

LDAP replication breaking referrals

We have an issue that we believe is caused by ldap replication changing the port of the referal from 686 (secure) to 389 (unsecure). If we setup a new referral everything works, but then as soon as ...
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1answer
706 views

Redis sentinel + HAProxy failover

I am looking to implement a HA redis implementation using Master-Slave redis servers. The web servers will connect to these through an HAProxy instance installed on each box. The situation is easy ...
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1answer
25 views

re-enabling a table for mysql replication

We were able to setup mysql master-slave replication with the following version on both master/slave: mysqld Ver 5.5.28-29.1-log for Linux on x86_64 (Percona Server (GPL), Release 29.1) One day, ...
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1answer
52 views

How to run a safe, responsible, fast MySQL backup

I've been tasked with assorted maintenance of a DB. I have very little experience with MySQL, so pardon any ignorance :) Two (well, four) related questions: The DB is supposed to be replicated to a ...
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1answer
35 views

Mysql Db replication

I have the following setup: 3 servers, B1, B2, B3. A database from B1 is being replicated to B2. B1 is master and B2 is slave. Now, I want an another database from B2 to be replicated to B3. I need ...
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1answer
132 views

Is there a way to synchronize my distributed storage infrastructure with file changes possible on each location? [closed]

I need a storage device in 3 different location. Each device will have 4TB of storage. At least 2TB should be a 'shared folder' working like Dropbox: when a user change a file in one location, the ...
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94 views

Is it okay to take ownership of dfsrprivate folder?

New Windows 2012 file server using DFS-R: which is working fine. The diagnositics report shows pre-existing files exist which I'd like to delete as they are wasting a bit of space. Previously on ...
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1answer
211 views

Why would a domain controller encouter a USN rollback after an unclean shutdown?

I have this Windows Server 2008 R2 domain controller running on a physical Dell server, model PowerEdge R510. There are some electrical problems around here, thus a black-out is, unfortunately, quite ...
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1answer
839 views

how to install pg_archivecleanup for postgresql 9.3 on Ubuntu

I am trying to get streaming replication working with postgresql 9.3 on Ubuntu 13.04 (Raring Ringtail). I installed postgresql on master and slave by doing: apt-get install postgresql I believe ...
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104 views

Jboss lost connections to MongoDB “WARNING [com.mongodb] emptying DBPortPool to /x.x.x.x:27017 b/c of error”

I have a few Jboss 5.1 servers which uses MongoDB data set. Till yesterday I had 3 Mongo 2.0 nodes in this dataset. Yesterday I added 2 Mongo 2.4.6 secondaries to this dataset; and after that I see ...
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1answer
332 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 ...
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123 views

Replication of files between a windows server and a NAS

I am planning some improvements to my server infrastructure and I have encountered a potential problem. I currently use dfs replication to sync files between 3 windows servers at 3 different sites. ...
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1answer
111 views

Best PostgreSQL HA strategy for 99% read scenario?

I'm in the process of building out a new PostgreSQL (9.3) environment in which traffic hovers around 99% read. We'll have 2 very powerful machines, connected via 1Gb ethernet. With the multitude of ...
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93 views

postgresql streaming replication not replicating until it reaches archive_timeout

Working primarily from this blog post I have managed to get replication working between two test servers. The master/server are supposedly set up to do streaming replication, with WAL archiving as a ...
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1answer
144 views

OpenLDAP: recommended way to add a new server to a replicated multi-master setup

I have previously set up two servers with multi-master replication, using the cn=config configuration format (I think I've seen it referred to as 'OLC'?). It was a process similar to this (although ...
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28 views

Files changes sporadically visible in nginx - load balancer - varnish

First all of thanks in advance for taking time to read my issue, the thing is that I got a full 32 servers balanced with 4 load balancers, sometimes I got to do some direct changes to the site being ...
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225 views

sphinx real time index on two servers indexing same database - will it have same data al lthe time?

The problem I'm solving is balancing load and removing single failure point from the sphinx search engine server. So I'm looking to create a set of two sphinx servers, each of which is going to use ...
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1answer
3k views

How do I fix issue causing “incomplete startup packet” log message trying to implement replication in Postgresql?

I've got two cloud servers running Ubuntu 13.04 and PostgreSQL 9.2. I've primarily used this blog post to aid me in setting things up. However, to do the initial database dump to the slave I'm using ...
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1answer
187 views

High Availability on Windows Azure Websites

One of my main apps is hosted on Windows Azure's Websites platform. Given Friday's downtime, I realized that I need something that allows my app to stay online if Azure has an outage again. My ...