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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all dfs replication groups failing at the same time

We have 2 pairs of fileshare servers. All servers are virtual Windows 2008 R2. Each pair is replicating over a WAN. Occasionally all DFS replication groups fail at the same time. I could not find any ...
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126 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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105 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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116 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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134 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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655 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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4k 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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34 views

Unable to create index on solr, when using Zookeeper

Evening, I've created a what I believe to be a simple SOLR cluster, with Zookeeper (external binaries instead of the embeded). For simplicity, this cluster is: Master: SOLR1 Slave: SOLR2 Both ...
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60 views

DFS-style Replication for Samba?

I've been snooping around here for a while, and it looks as if glusterfs might be the answer to my question. However, I am fairly new to this, so a sanity check would be much appreciated! My setup is ...
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152 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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51 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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138 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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201 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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45 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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246 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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230 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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430 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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83 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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437 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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363 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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460 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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123 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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890 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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439 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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476 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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284 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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203 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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604 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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165 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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744 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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59 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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596 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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7 views

SQL server is replicating to wrong subscriber

I have a publication which is intended to push data to a subscriber over the internet from a remote server to our onsite local subscriber but it ends up on a wrong subscriber.Here is the scenario: ...
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17 views

MySQL - Error Reading Packet From Server - Adding new slave to replication environment

I have a working application, currently using MySQL, 1 master, and 1 slave. Everything appears to work fine with replication. I am using WAMP Server 2.5 (Windows) MySQL v 5.6.17 I have followed a ...
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16 views

Gluster for replication/propagation

Say I have a bunch of servers that access a gluster mount to serve files via http. Files are sourced internally, and are copied from an internal server to the gluster mount on one of the download ...
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31 views

MySQL replication - invalidating query cache entries (table)

We lately mved to MySQL V5.5 on CentOS release 6.7 with master and 2 slaves. Since then the replication process lags a lot behind the master with the line in the process list of: invalidating query ...
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27 views

Adding network-fault tolerance to drbd or drbd alternatives

I've been working with drbd for about a year now, and at this point I'm tearing my hair out in frustration. Every time there is a network fault (something that is disappointingly common in the ...
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25 views

PG, Redis, and Elasticsearch replication for 2 distant metal servers

After years of running a web app on ~15 separate VPS, I'm switching to a single physical server*. App uses 3 DBs: Postgres, Redis, and Elasticsearch, and can update to latest version on all 3. ...
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25 views

Unable to connect to MASTER: Resource temporarily unavailable : Connecting to MASTER no:0

I'm currently working on simle active stand/by Redis clustering for query caching with Keepalived. The problem I'm facing is when I shutdown&start(restart) the host1 server for testing, it ...
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12 views

Merge and transactional SQL replication…database empty (SQL 2005)

Firstly, let me just say that I'm a novice at SQL in general and this might be an easy fix for someone reading, but I've been unable to find anything that would explain or help my issue online. If ...
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8 views

Planning For Growth with GlustreFS

I'm looking into GlusterFS and want to be able to add capacity one storage node at a time. I want to mirror data on two nodes at all times, and keep maintenance simple. I also want the cluster to keep ...
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13 views

Data is re-inserted when replication is done

I have a transactional publication done between two databases on different Virtual machines connected with a network. I noticed that for some reason Every time replication is happening (which is every ...
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18 views

Testing VMware replication on the same storage

We have two sites setup with VMware Site Recovery Manager (SRM) using VMware Replication to synchronize VMs. I need to validate the procedure for the site switch-over but I can use only one site. My ...
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117 views

Linux LVM replicated Volumes

I am migrating storage arrays, on two sites.The DR site has synchronous block replication from main site that will be cut during the migration, however once the volumes are migrated the replication ...
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126 views

Why is it not possible to mount a replicated gluster volume with one Gluster server?

I am running 2 glusterd on individual machines connected by private network. It apears that I can only mount the bricks if both deamons are up, otherwise it failes. As I am pretty new to glusterfs, ...
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209 views

Redis Multi-Master Replication

Scenario: We have two datacentres which run concurrently (both serve traffic). Each has it's own entire stack of infrastructure, so it can operate without the other being up. That said, we would ...
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26 views

GluserFS - data out of sync

I have a glusterFS master - slave geo-replication. The data is out of sync and I would like to do a full sync (without having to do the full copy again -> 6.4 TB over network). The glusterFS version ...
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11 views

MongoDB with ReplicaSet perform updates / compact

I have a MongoDB in ReplicaSet with 1 primary, 1 secondary and 1 arbitrer. I'm doing an heavy update operation on a huge collection (more than 2.5M records), this operation will decrease the ...