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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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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504 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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70 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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178 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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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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54 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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60 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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2k 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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31 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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2k 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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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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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
293 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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1answer
82 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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64 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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876 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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1k 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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185 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 ...
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96 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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456 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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347 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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440 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 ...
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1answer
151 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 ...
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2k 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 - ...
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254 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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202 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 ...
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1answer
1k views

Very poor optimization: Riverbed-Test-Appliance and NetApp SnapMirror replication

We are actually testing Riverbed Steelheads in order to accelerate replication using SnapMirror between two sites. The distance ist 100km between the sites. Connection: 150Mbit MPLS Network Systems: ...
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167 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 ...
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2answers
222 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 ...
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1answer
387 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 ...
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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 ...
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789 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 ...
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511 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 ...
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1answer
61 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 ...
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147 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
77 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 ...
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1k views

Windows Domain replication monitoring tool

I am looking for web-based interface GUI, or some kind of monitoring tool that will show replication status for a domain. I know I can use repadmin with various options on the command line to query ...
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3k views

AD Replication Monitor

Is there something like Replication Monitor (in Windows 2000) available in Windows 2008 R2? What tool do you use to check replication health?
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300 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 ...
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1answer
476 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 ...
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1answer
148 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 ...
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1answer
158 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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580 views

Git push from post-receive

I have two servers, let's call them first and second. First one is where the real development is done, and second one should be the replica. What I would like to do is put "git push" in post-receive, ...
4
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1answer
286 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 ...
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3answers
943 views

multi-master replicated dynamic dns subdomains

For lack of a better title. Our environment requires having subdomains where we allow dynamic updates using bind as the DNS server and its nsupdate utility authenticating via keyfiles. We're looking ...
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345 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 ...
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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 ...