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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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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1answer
82 views

Strange issue with one CCR node exchange 2007

When I fail over to one of our exchange nodes, the store.exe has a very high CPU. It goes to about 50-60% even with no users connected. With users connected it stays up near 100%. On the other node ...
3
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1answer
2k views

Exchange 2003 to 2010 public folder replication

I've found several guides and tutorials on public folder replication from 2003 to 2010, but am still a little bit confused. What we have, is a 2003 exchange server obviously holding all of our public ...
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1answer
583 views

Very slow MongoDB replica set

I have set up two Mongo instances in EC2 having RAID10. I set up replica set using those two servers and found that this replica is very very slow over network. If I log in locally and issue query ...
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3answers
3k views

Ubuntu + ZFS: How to migrate entire system to new disks?

Here's my scenario: I have Ubuntu with native ZFS installed on a server with 2 x 500 GB SATA disks. I installed it following this guide: ...
0
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2answers
228 views

Fault tolerant DBMail with PostgreSQL Replication - what are my options here?

I'm currently planning a more fault tolerant setup for my organizations Mail setup. We currently have two machines available in different datacenters, that we're planning to use for this, one being a ...
1
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1answer
175 views

How hard is it to setup SQL Replication? Can it be done by a Semi SQL User? [closed]

I'm a semi SQL user, not a DBA, just a regular programmer. One of my upcoming jobs require a SQL replication configuration. I have never done such configuration before My colleagues have been ...
4
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1answer
283 views

Adding a new location through Active Directory. How should it be done?

Our entire Active Directory forest is currently on a single 10/8 private subnet. We're looking to migrate most of our servers to a cloud provider, but I'm not sure how to set up the first domain ...
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2answers
1k views

Amazon RDS to EC2 replication [duplicate]

Possible Duplicate: Is it possible to use an EC2 RDS MySQL instance as a slave to an external master? My read-intensive application needs to scale horizontally. It will be deployed by ...
2
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2answers
178 views

MSDE 2000 to MSSQL 2008 SQLExpress replication

I have an old database on MSDE which I need to replicate (one-time process) to a new MSSQL 2008 SQLExpress installation. What are my best options to replicate without involving messy sql scripting? ...
0
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1answer
1k views

Memcache Master and slaves

I'm using memcached-1.4.5-1.el5 & memcache-2.2.6 as php extension and memcached-1.2.8-repcached-2.2.1 for replication. The above packages are installed on 4 servers. How can I do the following? ...
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4answers
1k views

DRBD or similiar RAID over net on slow/limited networks

I am looking for ways to create some kind of file replication without losing too much performance on file operations. A real RAID is not an option due to non-technical constraints. As far as I ...
0
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1answer
337 views

MySQL init.d script with different configuration file

I have two instances of mysql running on a server. I need two different init.d scripts. The two instances have different configuration files /etc/my.cnf and /etc/my-slave.cnf. I copied the ...
2
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1answer
166 views

MySQL Replication: Move slave to be slave of another slave, without any (or least possible) downtime

I have the following setup: M1 = Master 1 S1 = Slave 1 S2 = Slave 2 S3 = Slave 3 Where all slaves are replicating directly from M1. I would like to move S2 and S3 to be slaves of S1. I'm not sure ...
3
votes
2answers
875 views

Safe initial sync for SQL Server OLEDB/ODBC Replication

I am trying to setup one-way, transactional replication from SQL Server 2008 R2 to PostgreSQL 9.1. I'm trying out the PGNP OLE DB provider. I can successfully create a subscription, and transactions ...
2
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1answer
4k views

Why does replication fail with error Duplicate entry for key?

We have been replicating for a year or two now with little problem. Sometimes we get an erroneous SQL query which stops replications, and we use the following commands to get it going again: STOP ...
1
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1answer
275 views

One Way Replication of Oracle 11g to MSSQL 2008R2

We're in the midst of a major LOB system change which will use Oracle 11g, but we need to maintain a LARGE number of existing reports in SSRS. What is a good method to automate a one-way, read-only ...
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2answers
1k views

Expected performance of e-SATA port multiplication?

For a certain read/write workload, I get 30 MiB/s from a 4-disk array using esata port multiplication. When I move the exact same array to four individual sata connections, I get 90 MiB/s for the same ...
4
votes
2answers
211 views

Is there a safe way to bypass a non-replicating DC?

We have a domain controller that was virtualized a while back; this caused issues with replication that we're now seeing fallout from. I've moved the PDC Emulator and other fsmo roles to a new DC and ...
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2answers
447 views

Distributing SQL Server on Internet regarding security issue

We are going to put our servers in two places to keep high level redundancy and to avoid bandwidth critics. The two servers are on different LANs but communicate over a WAN network (via Internet). One ...
0
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2answers
64 views

SQL server backups - backwards situation

Hi I'd like to know if it seems feasible to do things in this manner. We have several application servers (a web server for intranet applications, a couple of different app servers). Each server is ...
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1answer
1k views

How can I provide live replication of a Linux server?

I need to be able to do live replication of a running Ubuntu server, so if the main machine goes down I can automatically failover to the other machine. I found mklivecd, but that seems to only get ...
0
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1answer
75 views

Aggregating data from multiple MySQL servers

I have 10 MySQL servers and each one holds a database that needs to be replicated to a single, centralised MySQL server. The complexity is that each server must replicate its database to the same ...
3
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1answer
174 views

What are possible results/side effects if replication between DC's in a Windows domain is unable to occur?

There's plenty of administration literature out there how to properly manage Windows servers. But in dealing with real life, things don't always occur like you want them to. In Microsoft's Windows ...
5
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2answers
3k views

Way to avoid server downtime when creating Master - Slave relationship?

I am preparing for setting up a MySQL master-slave or master-master relationship. Right now I have a single MySQL production server, and of course I don't want a lot of downtime while I connect the ...
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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: ...
0
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1answer
245 views

How to use AppScale

There are some wiki which explain how to install and setup AppScale. But I didn't find anything related to the extensive use of AppScale. I mean, what to do in case of major outage ? If the node ...
1
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1answer
287 views

DFS Replication, Losing folders

We lost a lot of folders in one part of our AD. I tracked down that we get a lot of errormessages about this in this form: How do we solve this? Why does this happen? (Some information edited) ...
3
votes
3answers
6k views

Run a MongoDB configuration server without 3GB of journal files

For a production sharded MongoDB installation we need 3 configuration servers. According to the documentation "the config server mongod process is fairly lightweight and can be ran on machines ...
2
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3answers
1k 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 ...
2
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1answer
219 views

Secure Microsoft Active Directory DC to DC communications through firewall boundaries

We are currently looking to flatten our AD structure a bit to make things a bit more manageable, but we still want to keep our security posture as near as possible to where it is now. Currently, we ...
0
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1answer
23 views

2 databases locked, but only one can be successfully dumped (backed up do *.sql file) … fail

i have this situation 2 large databases on mysql server - srv1 I need to transfer both to new server - srv2 so I use sql command "FLUSH TABLES WITH READ LOCK;" to stop all modifications Then I ...
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1answer
312 views

Replacement for MySQL proxy

We have a standard MySQL Master/Slave replication for our database. In order to use the slave server we have set up MySQL Proxy. However we have been strongly discouraged to use it as it still alpha ...
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2answers
2k views

Server 2008 DC rejecting replication requests

Have a DC that has recently been part of a business continuity test. From what I understand the server (which is virtual) was snapshotted, test carried out while the link between the two sites was ...
4
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2answers
1k views

Multiple VPS with mirrored database and filesystem

I've developed interest in VPS clusters lately and it seemed like a great idea to try to set up a multi-VPS setup, which I will describe below. It isn't really meant for production use, but more as an ...
2
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1answer
2k views

Setup a mysql replication, but new data are not updated

I have setup a MySQL replication for an existing database server. The setup seems fine, but the database never update on slave server after I start the replication. Both servers are using CentOS 5.7 ...
3
votes
2answers
336 views

SAN replication

My company has only a single storage box (SuperMicro hardware + chassis with a LSI raid card and 12 SAS 7.2k drive) in its current setup. It runs on linux and we hook it up to our fileserver via ...
2
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3answers
760 views

Active Directory set up with replication — need a way to control login authentication host

I have two Active Directory servers set up with replication, ad2 and ad4. ad4 has a higher latency than ad2 as it is offsite. All clients are supposed to log in and authenticate to the ad2 server. The ...
2
votes
2answers
925 views

How to ensure that a MySQL slave server is using the SSH tunnel to replicate from the master?

I need to secure MySQL database replication between two CentOS 5.7 servers. Server 1 has the live database, and replication is already working fine to Server 2 which is located elsewhere on the ...
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1answer
133 views

MySQL replication - Query is replicated even if explicitely ignored

I have a MySQL Master 5.0.77 replicating on a slave 5.5.13. So I'm using STATEMENT based replication. I have a query 'CREATE TEMPORARY TABLE blah' that is replicated even if it's not in the ...
0
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1answer
128 views

switching master with minimal downtime

Currently have a MySQL replication setup in which Master A is replicated on another server db Slave B. I'm shutting down the server that hosts Master A and need to start a new server that houses ...
-1
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1answer
167 views

Domain controller replication and distribution

What is the proper way to distribute work from the pdc to a bdc for authentication. If the bdc handles authentication, when it increments the bad password count, how is that relayed to the pdc? Does ...
1
vote
1answer
337 views

mysql replication - slave seems up to date but data not synchronized

I have a master-slave setup with 2 servers over a network. Due to an error, the slave IO thread stopped, though I could get it started and running, the slave is way behind the master. Also, SHOW SLAVE ...
2
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2answers
336 views

MySQL multi level replication breaks constantly

I have replication setup as follows Master A ----> Slave B ------> Slave C \-------> Slave D \------> Slave E - H I use this setup because I need a local copy at the office ...
1
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1answer
170 views

MySQL inconsistent data when using mysqlbinlog utility

I am having a problem in mysql replication. I have a mysql raw data snapshot and my master host have 2 binary logs (binlog.01, binlog.02 - start to log after snapshot was created) What I want to do ...
0
votes
2answers
110 views

MYSQL master-slave fail if slave behind proxy?

I have two linux machines, A and B. A is master and B is slave. Besides, B is behind proxy. In B , I have set http_proxy and socks_proxy env variable. However, B cannot connect to A and report ERROR ...
0
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1answer
55 views

Bind slave creating domain without any records

i have the same version of Bind running on two different host. When a new domain is created it is also created on the slave but there are no records within the domain. I am not sure what i need to do ...
4
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6answers
3k views

Need help with estimating required bandwidth for SAN array to SAN array replication over WAN

I have a long-term goal of setting up a DR site in a colo somewhere and part of that plan includes replicating some volumes of my EqualLogic SAN. I'm having a bit of a difficult time doing this ...
2
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1answer
202 views

DFS Replication across WAN

I have setup both sites in ADSS, set the subnets properly (I think), and setup a DFS share with replication. How can I test that to see which physical machine I'm actually accessing when visiting ...
2
votes
4answers
540 views

Solution for two-way file-system transparent solution

I need to implement some sort of HA setup where 2 servers need to be able to always be in sync, no matter on which one you write on. The DB part can be covered by a master-master replication setup. ...