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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2
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1answer
334 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
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0answers
168 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
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1answer
382 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
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3answers
184 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
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2answers
124 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
353 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
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1answer
70 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
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3answers
915 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 ...
3
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1answer
1k 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 ...
-2
votes
2answers
364 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, ...
0
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0answers
42 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 = ...
0
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2answers
1k 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 ...
5
votes
2answers
290 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 ...
0
votes
2answers
329 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 ...
2
votes
2answers
746 views

MongoDB replicaSet failover incurs 1000x query response time increase

I'm testing a production MongoDB replica set failover. When I manually fail one of the instances I see an approx. 1000x (one thousand x) decrease in response times of my PHP queries. I'm on the ...
3
votes
2answers
629 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: ...
1
vote
2answers
354 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 ...
1
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2answers
414 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 ...
-1
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2answers
116 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 ...
2
votes
1answer
1k views

vSphere Replication Guest OS Quiescing

I am using vSphere Replication 5.1 to send virtual machines to a separate datastore every 24 hours. One option in configuring each VMs replication is the Guest OS Quiescing option. Options are None ...
1
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0answers
309 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 ...
0
votes
1answer
95 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 ...
0
votes
3answers
1k 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 ...
3
votes
2answers
527 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). ...
1
vote
1answer
31 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, ...
0
votes
1answer
73 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 ...
1
vote
1answer
354 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 ...
1
vote
3answers
849 views

Could SQL Server 2008 replication be used with NLB to allow unlimited scaling of reporting servers?

We are currently using transactional replication in SQL Server 2008 to keep a secondary reporting server synchronized with a primary database server. This has been working weel and keeps some of the ...
0
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0answers
20 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 ...
1
vote
1answer
157 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. ...
0
votes
1answer
91 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 ...
0
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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 ...
0
votes
1answer
213 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 ...
8
votes
1answer
392 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 ...
1
vote
1answer
1k 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 ...
12
votes
7answers
10k views

USABLE multi-master replication for Postgres?

I tried Postgres-XC and it doesn't implement full SQL yet (like SERIAL) Postgres-R looks interesting but it's "not production ready" according to developers. So I used pgpool-II 3.0.1. Yes, it ...
4
votes
6answers
3k views

Need help with estimating required bandwidth for SAN array to SAN array replication over WAN

I have a long-term goal of setting up a DR site in a colo somewhere and part of that plan includes replicating some volumes of my EqualLogic SAN. I'm having a bit of a difficult time doing this ...
1
vote
1answer
715 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 ...
0
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0answers
199 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. ...
1
vote
1answer
115 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 ...
0
votes
1answer
424 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 ...
0
votes
0answers
32 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 ...
1
vote
6answers
2k views

Does anyone know of a free solution to perform failover for VMware ESXi? [closed]

I would like to setup a free/custom solution to perform failover for VMware ESXi. The setup is as follows: 2x Physical servers each with independent storage. For each physical server there are 2x ...
2
votes
2answers
462 views

<suffix> invalid DN 21 (Invalid syntax) on Converting slapd.conf OpenLdap

Actually i want to configure ldap as master-slave replication using syncrepl method, On any reference which i found,I'm running on Centos 6 machine and openldap v2.4.23. I following step by step on ...
0
votes
1answer
456 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 ...
0
votes
1answer
183 views

admin4.nsf set to future date after replicating with one of the server?

1) admin4.nsf set to future date after replicating with one of the server? 2) date is set to future now November 2013 3) tried clearing replication history, didnt help 4) tried to create a local ...
0
votes
1answer
48 views

replicate directory structre with 100k files to tens of windows machines

I have a directory structure with thousands of directories and around 100k files. (Actually it is a large java project's source tree). I have to replicate this to 10-20 windows machines. What I do ...
0
votes
2answers
259 views

MySQL geographic replication cloud

I currently have a standard local LAMP setup, (2 web servers, master/slave MySQL, load balancer). This is severing me well locally, but my global users experience slowness. I want to setup some ...
1
vote
1answer
560 views

postgreSQL replication and failover with repmgr on Ubuntu

I'm new to Linux and have been tasked with setting up a redundant Linux DB server with PostgreSQL. preferably the fail-over needs to be automatic, but a manual process will be fine for now. What I ...