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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Is it a good idea to store Docker volumes in glusterfs?

I am currently thinking about migrating some of our servers and apps to a coreos enviroment. One of the problems I see here is the management of persistent data as coreos does not handle Docker ...
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95 views

AD Replica DC Promotion Stall

I recently inherited infrastructure duties for a small startup I am working with. My traditional role has been development, so bear with me... I was hoping to start off on the right foot, and get ...
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12 views

When and how should we shard MongoDB?

We maintain a search service that serves data from MongoDB. Our Mongo production instance is arranged in a 4 node replica set across four physical servers. The database is comprised of several small ...
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26 views

combine two mysql replication log files

So I use a master-master replication of a mysql database and load balance traffic between the two. This results in server A with a binlog of all it's transactions and Server B with a binlog of only ...
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58 views

Solution for file data backup, versioning and replication

We have a growing set of data files (.wav files, image files etc) which are data, i.e not part of the application code - uploaded and modified by users. The number of files is in the 1000s and the ...
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85 views

Hyper-V Replica Capacity Planner stuck getting VM information

I'm trying to use the Capacity Planner for Hyper-V Replica tool to estimate requirements for a replica site. It keeps getting stuck "Getting the VM and VHD from primary site, this can take upto ...
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488 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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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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32 views

Postgres streaming replication over Internet

all: I want to set up two PostgreSQL servers, one as master server and the other one as a hot standy, using streaming replication. I have done this before in LAN environments, but I would like to ...
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31 views

LDAP syncrepl with kerberos authentication

I'm trying to set up a replication server for LDAP using syncrepl. I would like to use Kerberos to authenticate the consumer, because we have it set up, and it seems more secure. The database ...
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35 views

SQL 2008 over the internet replication

Please excuse me for the (probably) stupid question, but SQL Server is not my main proficiency here... I have 2 SQL Server 2008 R2 servers, one in an AzureVM and another one in my local datacenter. ...
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83 views

MSSQL Server 2008R2 Replication stall, no latency, no errors, missing data on subscriber

This morning after performing a routine database deployment of two new tables I noticed that transactional replication had stopped for more than 3 hours. When replication resumed it picked up 3+ hours ...
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123 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 ...
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35 views

Does having an extremely high number replication partners in Active Directory pose an issue in 2014?

I'm consulting a network where they have 5 domain controllers in central location and a lot of Read Only controllers in additional locations. SCOM is shouting that there are extremely high number ...
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169 views

Hyper-V Replication of VMs with Symantec Endpoint Protection Manager and Symantec Mail Security

I'm hoping for some advice on replicating Hyper-V VMs which are running Symantec Endpoint Protection Manager (SEPM) and Symantec Mail Security for Microsoft Exchange (SMSMSE). The problem is the large ...
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89 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 ...
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166 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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307 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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67 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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359 views

Server 2012 DFS New Member Issue

I am trying to add a new member to our DFS topology. We have 3 DCs (VMs - VMware) running Windows server 2012, two servers are located in or Primary site and the third at our DR site. Currently the ...
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269 views

mysql cluster node lost connection shutdown

I'm testing a mysql cluster with VirtualBox using several virtual machines: Each virtual machine (2 in total) has a mysqld and ndbd node. Plus there's a vm for the ndb_mgmd to manage the cluster. I ...
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332 views

MYSQL master master replication show master status show empty record

Environment: Windows 2008 R2, MySQL 5.051b Two servers: server1: 192.168.2.8 server2: 192.168.2.9 server1 > my.ini [mysqld] server-id = 1 auto-increment-increment = 2 auto-increment-offset = 1 ...
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115 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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677 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 ...
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310 views

SQL Server 2005 Mirror table between databases on same server

I've been using transactional replication to mirror a table from one database to another and lately it's been a pain to keep running. My goal is to simply keep an exact copy of a table in another ...
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367 views

Ways to speed up MogileFS rebalance?

I am in the process of upgrading storage for our MogileFS cluster and am using the rebalance and device drain features to migrate data from one set of devices to another. We have about 55 TB on one ...
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232 views

PostgreSQL 1 master, multiple slave replication over slow links

I have a current use case in which remote computers query a central PostgreSQL database over a internet connection (read-only). We would like to implement a "stand-alone" system for these terminals so ...
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188 views

DFSR: Break large replication group into multiple smaller replication groups?

Is there a way to break a very large replication group into smaller replication groups while avoiding a huge backlog while it re-syncs or verifies the files in each smaller replication group? I have ...
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527 views

Offline Address Book Not Replicating Between Exchange 2010 and Exchange 2003

I have recently installed Exchange 2010 in our Exchange 2003 (SP2) environment. So far everything has been great, until we noticed creating new users does not populate the OAB for people still logging ...
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157 views

Identity Range Management problem

Recently upgraded from SQL Server 2000 to 2008. When we recreated the Merge Replication we decided to use Automatic Identity Range Management (since it is now the default in 2008). The problem is ...
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646 views

Web sync merge replication cannot connect to publisher

Before I start I would like to clarify that I am setting up a test environment to configure & test WebSync before carrying out a deployment at a client. My machines are all running SQL Server ...
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50 views

SQL - progmatically change refresh rate for ALL publishers in replication monitor

How can I change progmattically change the refresh rate of all the publishers in the repliation monitor ? Without going into each one to change it's publisher setttings. MS SQL SMS 2008 R2 AHIA, ...
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73 views

Which method of SQL Server 2005 or 2008 Replication is best for ease of field changes?

We need 15 minute warm updates from one SQL Server to another. Log Shipping looks good and appears easy to setup. We are also looking into Transactional Replication. The data only needs to copy one ...
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38 views

MSSQL server 2005 replication - article properties

When i replicate some db, my schemas, roles and user information (connected with that db) are not replicated. Moreover, if table in db is empty, replication don't create it on subscriber side. How to ...
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565 views

Setup MSSQL replication with peer to peer topology: problem setting up Conflict Detection

I'm setting up a SQL Replication strategy, using MSSQL2008 with peer-to-peer publications (2 servers, each one subscribes to the other). I followed this HOWTO from MSDN, and the setup seems to be ...
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9 views

Mongo secondaries stuck at startup state

I have a MongoDB replica set with secondaries that won't make it past the STARTUP state. The database is large but they should have moved to STARTUP2 by now. The correct ports are open as I can ...
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16 views

glusterfs unable to read gsyncd status file

Goal I wanted to try glusterfs geo-replication in some virtualboxes on my computer for later use distributed on multiple sites. Configuration I installed glusterfs 3.6 on ubuntu 32bit servers like ...
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27 views

Invalid method Parameter when calling DfsrConnectionInfo->ForceReplication() with WMIC

In our AD infrastructure the SYSVOL is replicated by DFSR. I want to force replication using WMI (ForceReplication method) via WMIC: wmic /namespace:\\root\microsoftdfs path DfsrConnectionInfo call ...
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17 views

How perform a offline defrag of the the DFS Database

I have read in some posts that an offline defrag of DFS database you should do in case of an error (Jet Errors for example) during replication. Unfortunately, nowhere do I find a guide on how I can ...
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49 views

Best practice of using MongoDB Replica Set on AWS EC2

MongoDB needs at least three replica set members on independent locations to work automatic failover correctly. However, some of AWS Regions (such as ap-northeast-1) have only two Availability Zones. ...
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33 views

OpenLDAP - syncrepl errors but replication is working

I have 2 openldap servers working in master-slave configuration. I am using simple bind for replication but on slave side I find log entries like this: ldap_sasl_bind_s failed (-1) ...
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86 views

Problems with OpenLDAP-Replication

we just set up a Ubuntu Server with OpenLDAP running. We also have a second server, running Ubuntu as well. Now i tried to set up the replication using this guide: ...
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45 views

Can I get a running list of executed queries from mysql to trace problems?

This question was formerly: "Mysql replication logs are filling disk and halting server". However, I'm asking the community if there is a command line trace or live log that I could tail -f and see ...
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27 views

hyper v replication destination on

I want to test out 2012R2's Hyper V replication feature but I don't want to have to fork out for a new dedicated Hyper V host until I'm sure that the built in replication is fit for my needs. We have ...
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52 views

Why does Hyper V differs in authentication methods for live-migration and replication

Hyper-V provides different authentication methods for replication and live migration (2012 R2 based). Live Migration is using CredSSP and Kerberos and replication Kerberos or PKI-based authentication. ...
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86 views

Replica for the free/busy folder is missing - Event 14029

Recently, we migrated an Exchange 2003 server to Exchange 2010. Everything is working fine, except that Event 14029 is logged very often. Event ID 14029: Couldn't find an Exchange 2010 or later ...
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66 views

Removing a replication group

I am trying to un-install DFS on Windows Server 2012, that way I can try to re-install it as my servers won't talk to each other when attempting to replicate. I keep getting an error message that says ...
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86 views

Add security/authentication to mongodb (2.6) without downtime?

We have a 3 node replica set (running 2.6.1) that's running mostly defaults. We'd like to add authentication, but do it without downtime. I'm fine with restarting the nodes one-by-one and even ...
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109 views

Why does freshly created MySQL slave keep throwing foreign key errors?

We are running Ubuntu-14.04 LTS with its stock mysql-5.5.40 and mysql-utilities-1.3.5 and we are setting up some master/slaves couples. Some of them get up without any issues just like usual, but some ...
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68 views

sql web replication ?diag errors

Trying to configure web replication, and running into a number of issues. When running replisapi.dll?Diag, I receive the following errors: CLSID_SQLReplErrors FAILED 0x80040154 replrec.dll classes ...