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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2answers
198 views

With 3 production nodes, why Mongodb complains about even voting nodes?

I run a mongodb sharded cluster with 1 shard, 1 replica set (2 secondaries, 1 primary, 1 delayed slave). Frequently, the following message appears in the logs: [rsMgr] replSet total number of votes ...
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1answer
573 views

Error while setting up ldap replication

I'm trying to set up LDAP replication according to the directions on Ubuntu's site. I went through all the directions for setting up the provider without any trouble. But when I try to set up the ...
1
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1answer
219 views

Failover server for SQL Server mirror errors after reboot

I have two Windows Server 2008 servers set up, both running SQL Server 2008 R2. One is used as a primary DB, the other as a mirror failover (two website DBs + ASPState for sessions). Everything works ...
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1answer
71 views

How to arrange a replication in mysql?

Here is my problem. I have a busy Drupal site struggling under high load. After applying all caches I see that, no surprisingly, database is the bottleneck. I have two servers to handle the site: A ...
6
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2answers
997 views

What does zfs receive -F do?

When I read man zfs for zfs receive I see -F Force a rollback of the file system to the most recent snap- shot before performing the receive operation. If receiving an ...
2
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0answers
538 views

Openldap Mirror Mode replication failover

We have currently one master ldap server and around 400 slave servers which are partially replicated through that master.All openldap versions are same and 2.4.31 What we want is actually if master ...
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1answer
111 views

How does AD decided when to enable SyncOnStartup for inbound replication partners

I have been playing with the MSAD_ReplNeighbor wmi class for monitoring AD replication. I have a hub and spoke, single domain topology where three DCs are in the spoke site. One holds all the master ...
2
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0answers
3k views

AD Replication Errors / KCC - Between two Domain Controllers

I'm having quite an issue that began a few days ago. Let me just lay out exactly what happened - also I've inherited this environment, please keep that in mind. 1st Domain Controller - Windows ...
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0answers
94 views

Identical tables, different sizes?

I have transactional replication with updatable subscriptions going between a few SQL 2008 R2 servers (publisher is Enterprise, subscribers are Express). I need to add another subscriber, and come to ...
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1answer
135 views

Syncrepl support in Mac OSx 10.8 OpenDirectory

From Ryan Faas's article Apple's OpenDirectory does support overlays but I can't seem to enable the syncprov or accesslog overlays. Adding following block to slapd_macosxserver.conf turns the server ...
0
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1answer
108 views

Restore backup from SQL 2008 to 2008R2 with standby

We are looking to replicate our production database to another instance so that when reports are run, it doesn't slow down the application to the point of being barely usable. I had limited success ...
2
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2answers
7k views

What is the correct way to configure AD replication in a hub-spoke design

Our AD is a basic hub/spoke design. We have a headquarters in London, and remote offices. The remote offices are connected via VPN to HQ. We have 3 domain controllers at HQ, and one in each remote ...
2
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1answer
156 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
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1answer
111 views

Percona xtradb cluster with asynch slaves

I have a Percona xtradb cluster set up with 3 nodes. Node 1 is also set up as a master with an asynchronous slave. When I make an update to Node 1, it is replicated to the cluster as well as the ...
0
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1answer
74 views

Migrating MySQL from one server to another via master-master replication

OS is Linux. I imagine that the process is something like the following: Set up master-master replication between old and new servers. Cut over the db ip on my app server from the source db to the ...
1
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1answer
2k views

Active Directory Replication Bandwidth Consumption

There are lots of articles out there describing how to architect your replication toplogy, and all the reasons why, and they all boil down to conserving bandwidth, and achieving a convergence time ...
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2answers
55 views

Slave with more databases than master

I have two servers. Lets called ServerA and ServerB each has their own database server and web server. Those two servers are used to run different website. ServerA data is more important because it ...
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1answer
2k views

Exchange 2010 Mailbox Replication Service Error

We are repetitively getting: The Microsoft Exchange Mailbox Replication service was unable to process jobs in a mailbox database. Database: DB24 Error: Couldn't find system mailbox ...
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3answers
857 views

MongoDB: two nodes & primary election

According to Mongo documentation in order to safely deploy a replication set, you need at least two active and one arbiter because election of the a primary needs the majorities of the votes. Let's ...
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0answers
120 views

Mutli-master file system replication with acceptable read performance

I am trying to configure replicated storage over three sites - each site having a full replica of a file system, using either GlusterFS, or XtreemeFS. This replica must be readable - very fast - ...
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2answers
434 views

SQL 2005 replication not working

I am in the process of creating replication between 2 remote servers, server 1 is the distributor and publisher and server 2 is the subscription Server 1 windows 2003 server 192.168.10.1 connected ...
0
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1answer
1k views

Path to gpt.ini missing

I am seeing the 1030 and 1058 errors for a remote Windows Server 2003 domain controller. Specifically the 1058 error says: > Event Type: Error Event Source: Userenv Event Category: None Event ...
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0answers
729 views

Viewing the “Replication” tab for a replicated folder target in the DFS “Namespaces” node in the 2008 DFS console says replication “not configured”

On a server 2008 R2 box I setup a DFS folder folder in a namespace and then manually setup it up for replication in the "replication" node of the DFS console. Now when I go to the "Replication" tab ...
0
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1answer
2k views

Force replication of Netlogon

I have added a batchfile to the the NETLOGON directory for some start-up scripts. The script is tiny in size. I have waited hours for the files to be replicated to the other Domain Controllers but ...
3
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1answer
7k views

Repadmin gives operational error 58

While testing some remote DC's, "repadmin /replsummary" ended with an error of Experienced the following operational errors trying to retrieve replication information: 58 - ...
0
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1answer
2k views

SQL Server replication pending transactions

I'm having a problem with a transactional replication. I have the publisher in my server and there is a subscriber in another server. In my server, if I go to the details of the subscription I can ...
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2answers
390 views

Is it possible to create a mysql slave from start of masters binlog without copying data first?

info: my tables are all innodb. i know i can create a mysql slave by copying the data from master to slave and noting the position in the binlog and set that on the slave. thus the slave should be ...
0
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1answer
350 views

“Unable to get term attr: Invalid argument” while trying to SCP

I have to set up two LDAP servers for replication. My problem is that when i want to copy the master-slapd's database files with scp command i get the next message after typing in the account's ...
2
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2answers
133 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 ...
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1answer
280 views

Copy Exchange Database from Passive to Active

I have a CCR running with a total of 6 servers 2 MB, 2HT, 2 CAS. I had a failure on active node this morning and everything failed to my passive server, i had some issues with the logs, as the werent ...
2
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2answers
777 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 ...
0
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2answers
641 views

Synchronisation between MySQL databases on different hosts

I want to solve a data replication/data sync problem between two MySQL server instances. Both of them have the same database structure (databases, tables, columns, everyting ...) but each of them has ...
0
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1answer
1k views

Change DFS Replication scheduled time?

Is it possible to change the scheduled time for DFS replication between replication partners on Windows Server 2008? We have a backup that runs hourly and interferes with the replication. I then get ...
0
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1answer
72 views

AWS ElasticCache - Cross Site - Disaster Recovery

I'm using AWS ElasticCache (MemCached) and can see how instances can be created at different data centers/sites. (eg: singapore A or B) There is no AWS Automatic Replication of ElasticCache from ...
0
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1answer
242 views

Easiest way to replicate users between two (or more) servers?

I've got two webservers which takes part in a load balanced setup. The two webservers are in other words mirrors of each other. As it is right now I'm synchronizing data between these two servers ...
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1answer
93 views

Is failover with only two servers possible?

I'm trying to set up a basic high-availability solution with HAproxy and mysql. Currently it looks like this In case of host1 failing, the host2 is supposed to get it's IP and traffic (using feature ...
0
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1answer
476 views

MySQL replication re-sync

I'd like to set up a zero-maintenance hands-off MySQL replication regimen for backup purposes. It's been my experience, though, that these things inevitably eventually get out of sync. Perhaps it's ...
1
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1answer
769 views

MySQL error 2003 over ssh tunnel when replicating, not when using client

I am trying to set up replication on a MySQL server over an SSH tunnel. I've set up a port forward on the slave from port 7777 at localhost to port 3306 on the master, and I can connect to my ...
2
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1answer
170 views

Why is MySQL writing hundreds of 125 byte binary log files?

My MySQL Master (with no connected slaves right now) writes out a 125 byte file every minute or so: -rw-rw---- 1 mysql mysql 125 2012-12-28 16:46 snapshot-mysql-v2-bin.004876 -rw-rw---- 1 ...
4
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1answer
295 views

MySQL Master - Master Broken

I've Inherited a Mysql master master system, I've noticed the second master (lets call it slave from now on as it's running on a 'slave' machine) stopped getting its db's updated. I saw that Master: ...
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2answers
344 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 ...
2
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3answers
118 views

MySQL Replication A->B->C

I was setting the MySQL Replication for master -> slave/master -> slave and Replication for master -> slave its works fine but when i have enable this option in my.cnf log-slave-updates=1 for ...
4
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1answer
506 views

MongoDB Replica-Set with Replication Lag on one node only

we experience a strange behaviour in our MongoDB Replica-Set, setup of 3 Nodes (all Xeon Quad-Core-Class CPUs, 16GB of RAM for one, 24GB for the other two nodes) The one node with less RAM is normal ...
2
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5answers
371 views

Master - Slave MySQL setup on a VMWare Cloud — Is it needed?

We currently are in the research phase of building a "Master" database for our e-commerce business that will centralize all data, including product information, vendor information, Magento ...
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1answer
550 views

MongoDB Replica Set, initiate() need to login error

I am trying to setup a replica set, but when I issue: rs.initiate() On the first server, I get the following error: { "errmsg" : "need to login", "ok" : 0 } That is strange though, because in my ...
5
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1answer
643 views

Replication of lockoutTime attribute is not urgent on AD-LDS

I have two LDS servers on the same subnet. They replicate well. If I change an attribute, it gets replicated after 15 seconds. LDS is configured to honor password policies. When a user makes too ...
2
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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 ...
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2answers
1k views

Server 2012 Data Deduplication Skipping Replica VHDs

I'm currently trying to use data deduplication on two seperate Windows Server 2012 Datacenter edition hyper-v hosts. On one, I am trying to dedupe replicas that are still being resync'd every 5 ...
2
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3answers
4k views

What can I really do with percona toolkit's pt-table-sync?

I have been looking for a tool to synchronize tables from 2 different databases and found pt-table-sync. I read the documentation and got confused: they mostly use examples referring to a replicated ...
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1answer
602 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 ...