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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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
205 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 ...
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466 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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47 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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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
70 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 ...
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2answers
462 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 ...
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1answer
232 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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47 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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221 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 ...
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2answers
353 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
544 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 ...
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168 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 ...
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2answers
72 views

Switching SQL Server Replication Publication

I have a production database hosted on SQL Server 2008R2 Standard that is replicated to a second server running the same version of SQL server via a subscription to the production database. The ...
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1answer
2k views

Configuring openldap multimaster replication using cn=config

We currently have a single OpenLDAP server using the cn=config backend. We'd like to add a second OpenLDAP server and configure them for multimaster replication. What do we need to do to enable ...
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1answer
86 views

No replication between two DCs, tomestoned?

A site-to-site VPN has been down between two sites for around 120days, which means the DC at the peer site hasn't had any inbound replication from the main site DC. When does the DC object get ...
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1answer
163 views

Group policy central store replication

Should i care about replication traffic, generated by group policy templates central store? Do templates, stored there, replicate with client machines?
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1answer
123 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 ...
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1answer
458 views

Session replication in Tomcat

I have setup my cluster with one loadbalancer and 2 nodes with sticky session. I am using mod_jk for loadbalancing. I am having problem with proper session replication. I am using Tomcat 6. When I ...
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1answer
125 views

raid with replication

We are planning to buy two servers which will going to host an SQL database(PostgreSQL). The second server will work as a live replication of the first database server (hot standby). The question I'm ...
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2answers
3k views

DFS-R alternatives?

I was wondering what alternatives to DFS-R are out there on windows machines for real-time bidirectional file & folder replication? DFS-R requires active directory and a domain controller which I ...
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0answers
281 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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183 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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220 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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1answer
122 views

Disable OpenLDAP replication

I set up openldap replication so that if my primary LDAP server were to die, I would have another LDAP server ready to use just in case. I used the directions on Ubuntu's site to set up the ...
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1answer
400 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 ...
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1answer
50 views

MySQL replication as both master and slave (replication loop?)

I've got two MySQL servers, one as a master in the replication process and the other as the slave. I was wondering if anything bad would happen if I made the current master a slave to the current ...
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1answer
129 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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2answers
589 views

MySql server master-master seconds_behind_master jumps

I'm running a 4 servers master-master cluster of MySql. (2 servers version 5.1, and 2 version 5.5) While checking the slave status, i see the seconds_behind_master at 0, and half a second after i see ...
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2answers
153 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
122 views

For a simple replication over 2 server computers, should I use glassfish replication or ubuntu replication, or something else?

I want to set up a simple replication or exact mirroring, using 2 server computers I just bought, for the following purpose: I want to set up some websites, which, by design, may eventually need to ...
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1answer
68 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 ...
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2answers
665 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 ...
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82 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 ...
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325 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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4answers
3k views

is ROBOCOPY a good form of backup as a tool?

seeing how it does not do a write verify unless scripted (or is it needed?) is it a decent option to dump a few folders to another server? i am just worried about whether the data, after being copied, ...
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2k 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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60 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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4answers
4k views

DFS-R or WAFS for Syncing 1TB Files between remote sites

We have 1TB of files that we wish to keep in sync between three locations. This data consists of around 1.5 Million files which grows/changes at an average of 100MB/day. The first location is a ...
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1answer
74 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 ...
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2answers
4k 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 ...
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35 views

How to do replication of data on mysql?

i am trying to do mysql replication for my site database. i searched on internet but did not get proper solution for replication. i am looking to do replication on same server.
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1answer
3k views

Which binlog format to use for MySQL Replication?

Just about to start using MySQL replication and I'm wondering what kind of binlog format is the best to use? There's Row, Statement and Mixed. I'm going to be using 5.1.49. Row is winning at the ...
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5answers
1k views

Solaris to Linux conversion: Use VxFS or GFS?

We're a Solaris shop looking at RedHat Enterprise Linux and one of the things we're wondering is if we should keep Veritas Volume Manager + FileSystem or go with LVM+ext3 or RedHat's preferred cluster ...
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5answers
3k views

How can I rebuilt MySQL replication without dumping the master?

Our MySQL database has grown fairly large, and I am running with master replication. Replication is broken. I am trying to rebuild the second master without freezing up the first master in doing a ...
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3answers
485 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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2answers
54 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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94 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 ...
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68 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 ...
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1k 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 ...