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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191 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
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2answers
585 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
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2answers
335 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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2answers
214 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
282 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
90 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
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1answer
745 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 ...
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0answers
183 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
80 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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3answers
591 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
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2answers
300 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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1answer
26 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
36 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
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1answer
160 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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0answers
58 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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3answers
829 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 ...
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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
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1answer
62 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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0answers
17 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
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 ...
0
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1answer
143 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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0answers
100 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 ...
8
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1answer
233 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
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1answer
968 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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0answers
119 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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7answers
9k 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
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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 ...
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1answer
382 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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0answers
144 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
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1answer
113 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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1answer
209 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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0answers
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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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
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2answers
265 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 ...
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1answer
218 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 ...
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1answer
112 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 ...
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1answer
45 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 ...
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2answers
185 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
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1answer
414 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 ...
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0answers
41 views

When CopyQueueLength is high, how do I control which server is the source?

When I have a DAG with copies spread all over the world, and the initial seeding is already complete, how does Exchange control which server is used to fulfill the outstanding CopyQueueLength logs ...
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1answer
58 views

Replicate server to another enviroment

I am adopting a new enviroment for my application in production. My old env has a lot of configuration, like e-mail server, application server, database, java plataform, etc. I would like to replicate ...
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1answer
68 views

Backing up files on Debian

I need to backup a file on my file server to an external hdd. I want the folder to be replicated on the hdd every day. What kind of backup software do I need. I run Debian 7.1 and want to be able to ...
4
votes
2answers
399 views

How to change the master in a MongoDB cluster without restarting the process?

Reading the documentation of MongoDB about how to configure a master-slave configuration of a cluster (our cluster will have more than 12 nodes, so unfortunately we can't have a replica-set ...
1
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1answer
202 views

What are the options for any SQL Multi Master Master replication?

I am looking for a proper way to do Multi Master Master replication. I am currently using MySQL but open to switching to Postgres or Oracle if needed. So far the only solution I find is ...
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0answers
46 views

Can Active Directory notify my on changes?

We have a corporate Active Directory and a secondary service that contains user profiles from Active Directory. We have a regular Sync Operation that copies stuff from Active Directory to our profile ...
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0answers
212 views

Replication with Veeam causes timeouts on large VM's

I have been trying to replicate two of my larger VM's one being Exchange 2003 and once the snapshot begins to commit the server begins to time out. I have updates my ESX hosts from 4.0.0 to 4.1 and ...
7
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2answers
318 views

How can I save a domain controller after a USN rollback without rebuilding the whole server?

Today I had (again...) to lobotomize a domain controller which had suffered the dreaded USN rollback; the standard solution to this issue is to demote it and then promote it back again, but the main ...
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1answer
448 views

“Could not create IPv6 socket” postgresql standby error

I'm trying to create Postgresql 9.1 hot-standby using following steps: Configured 2 virtual linux machines. Master's ip: 10.10.10.1, Standby's ip: 10.10.10.2. Ping test passed. Restored the same db ...
0
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1answer
155 views

How can I synchronize users in a master-slave server setup on debian squeeze?

I'm currently setting up a 1:1 replication of a linux server. To simplify the process of updating users and groups I considered changing the uids and gids on the slave server to have them all like on ...