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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1answer
728 views
Looking for advice on Hyper-v storage replication [closed]
I am designing a 2-host Hyper-V R2 cluster with 6-10 guests stored on a SMB iSCSI SAN device (probably Promise VessRAID). I will be getting at least two of the SAN devices and
need to eliminate the ...
0
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2answers
2k views
Exchange 2010 don't see its PDC (same machine)
I have two 2008 R2 servers which should replicate AD. One si production server, second backup. On primary server is also Exchange 2010. There were plans about a year ago to install exchange to backup ...
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3answers
241 views
MySQL per-database replication?
So, my problem is interesting: we want to migrate from one server to another. We made a master-slave replication, but my boss came with the idea to make migration one database at a time.
So he asked ...
0
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1answer
142 views
hosted failover(proxy?) service - does it exist?
We're in the planning phase to make our web application services redundant. Right now we've got our own physical servers at a colo, running a VMWare cluster connected to an EqualLogic SAN. It's a LAMP ...
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0answers
159 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 ...
2
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1answer
874 views
How can I check that DFS is replicating correctly? [duplicate]
Possible Duplicate:
compare the contents of two folders that are replicating by dfs
We use DFS to replicate files to a Disaster Recovery server.
We have a task where we check the DR ...
7
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4answers
1k views
Is DRBD the only viable block replication solution for Linux?
I've found myself needing redundant storage at a block level. File-level replication (Gluster, GFS, etc) does not work for my use case.
It looks like DRBD is the go-to solution for block ...
1
vote
2answers
161 views
mysql replication 1x master, 1x slave
I have just setup one master and one slave server, but its not working..
On my website I connect to the slave server and I insert some rows, but they do not appear on the master and vice versa.. What ...
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0answers
153 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 ...
1
vote
1answer
56 views
mongod: automatically initiate replica-set
Currently I manually execute the rs.initiate() in the shell after starting a mongo primary or secondary machine to join the replica-set "farm". Doesn't the /etc/mongodb.conf allow me to define the ...
2
votes
1answer
293 views
What the best way to achieve RPO of zero and lowest possible RTO (less than 15 minutes) with SQL 2008 R2?
We are running a payments (EFT transaction processing) application which is processing high volumes of transactions 24/7 and are currently investigating a better way of doing DB replication to our ...
3
votes
1answer
653 views
HAproxy with MySQL Master-Master Replication incredibly slow
I have two MySQL servers in multi-master mode, with an HAproxy machine for simple load balancing/redundancy. When I am connected to one of the servers directly and try to update about 100,000 entries, ...
1
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4answers
232 views
Data replication between two web nodes
I have Wordpress installation running on two web servers (Nginx). There is unidirectional synchronization from server A to server B and I'm using lsyncd for this purpose.
with his configuration I ...
0
votes
2answers
136 views
Scaling web application with SQL Server 2008 database
I have a database which has 90% of read only tables. 10% of the tables has writable data. We need to scale the ASP.NET application.We need to add more users who will not be writing to the database. We ...
2
votes
3answers
142 views
Create a full replica of web server using different hosting company, is it logical?
Is it logical to create a full replica of our webserver, just on a less powerful machine, using other hosting provider ( just because its cheaper ). The idea is to have a plan B, in case main server ...
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0answers
81 views
OpenLDAP + samba replication [closed]
I am working in a multi branch University and I was just wondering if it would be possible to build a multi site (replication) OpenLDAP server + samba replication. After some research on the web I ...
1
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0answers
93 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 ...
0
votes
1answer
202 views
OpenLDAP replication fails, “syncrepl_entry: rid=666 be_modify failed (20)”
I've configured a second host to replicate the main LDAP server via syncrepl in the slapd.conf:
syncrepl rid=666
provider=ldaps://my-main-server.com
type=refreshAndPersist
...
1
vote
1answer
95 views
SQL Server 2008 Snapshot Replication Trigger Start
I have setup a production server and a staging server. Whenever we are at the point in our release cycle where we want to begin testing on staging I want to copy the production DB over to our staging ...
1
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3answers
94 views
How do I data warehouse a set of tables and delete the source?
I have a large table in MS SQL that I am having issues reading from while a third party application writes to it. My plan to resolve the problem is to move all of the data from one database and delete ...
3
votes
1answer
278 views
MongoDB -what's the safest and most efficient way to change from Master-Slave to ReplicaSet?
I now have two mongo servers with a Master-Slave configuration (all read-writes are done with the Master, the Slave is just a cold backup) serving a pretty demanding web app.
I want to switch to ...
0
votes
1answer
816 views
Update RDS db via mysqlbinlog: “you need (at least one of) the SUPER privilege(s)”
We are moving a production site to EC2/RDS
Followed these instructions:
http://geehwan.posterous.com/moving-a-production-mysql-database-to-amazon
I have set up row-based binary logging on the ...
1
vote
2answers
1k views
MySQL Binary Log activated = high-end server damn slow
On MySQL 5.1(.57-1.dotdeb), I have a ~2.0Gb database, and an average of ~350 requests per second.
All is running fine if I don't activate the binary log. The CPU usage is decent (~15% of 1 CPU ...
2
votes
2answers
165 views
How many mongod instances should I run with a 2 server replicaset setup?
Currently I've got server A and server B running with the following mongod instances:
Server A
mongod server (usually PRIMARY)
mongod arbiter
Server B
mongod server (usually SECONDARY)
When ...
0
votes
2answers
150 views
File synchronization between the web nodes
I'm looking for some bidirectional data synchronization between the web nodes. I've got two web servers with DNS load balancing. I'm using "lsyncd" at the moment however because of load balancing ...
0
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1answer
93 views
Copy two remote folder into one local folder
I try to merge two folder (from remote Server) into one local directory. It is a deployment issue, on one Server there are two folders \server1\folder1 and \server1\folder2, now i try to merge both ...
1
vote
2answers
293 views
Possible to regularly export MS-SQL tables to another DB format on Linux without complete dumps?
We have a production server running SQL-Server, which holds our backend data, e.g., customer information, sales invoices etc. The nature of this data is that "old" data can change, e.g., a customer ...
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0answers
141 views
What does “DFSR Backlog Count” represent?
What does "DFSR Backlog Count" represent? Is it simply the version difference between two members of a replication group or is it the actual count of files that need to be updated? I haven't pinned ...
4
votes
1answer
3k views
How to monitor DFSR backlog more efficiently than dfsrdiag
Is there a way to monitor the DFSR backlog in a manner more efficient than using dfsrdiag.exe backlog?
I wrote a program that just slurps in the backlog count via dfsrdiag.exe backlog /smem:alpha ...
8
votes
2answers
2k views
Windows DFSR - Changed replicated directory permissions and now have a 350,000 backlog for more than a week
Question: Is there a way to make this 350,000 file backlog complete faster? For nearly every file the only change was a change to the ACL for each affected file. Some files have changed content, ...
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votes
4answers
432 views
Starting a branch office on the other side of the world
Going to cut right to the point on this question, as I'm after as diverse range of solutions as possible so don't want to effect any opinions with the question too much.
Client is a UK based ...
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0answers
127 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 ...
2
votes
1answer
97 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 ...
0
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0answers
251 views
ShadowProtect and Image Replication with ShadowStream
I'm not sure if anyone here has made any real use of ShadowProtect software, more specifically, the ShadowStream server that can be used to replicate images and incremental s over the web to your ...
3
votes
3answers
182 views
What backup method should I choose to backup database on high-load server
I have a mysql (MyISAM) database with size around 30Gb. It has single large table (and some smaller ones but it makes no difference). It performs around 2000 selects (single row by primary ...
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0answers
118 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 ...
2
votes
1answer
2k 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 ...
3
votes
1answer
155 views
MySQL slave server restart
What's the secure/proper way of restarting the MySQl slave server.
I need to reboot the machine in order to update the kernel and apply some configuration changes.
I've tested it on my lab and ...
0
votes
2answers
75 views
what is a good frequency for setting up snapshot replication in sql server 2008
My requirements:
I have a publisher database from which I intend to replicate to a subscriber.
Not all tables need to be replicated.
Amount of data could be ~20-30GB.
Given the above:
is ...
0
votes
1answer
370 views
dnslint and redadmin, why and when?
A pretty small query really - dnslint and repadmin - what really differentiates these tools in terms of troubleshooting replication? When and why would you use either one.
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votes
1answer
174 views
Repadmin and DNScmd
A little query really in terms of the usage of Repadmin and DNScmd when forcing replication of DNS zones. I'm currently studying for my 70-640 (Active Directory Exam) and was wondering what the ...
0
votes
1answer
287 views
Mysql: What to do if a disc full happens on master OR slave and ther is no space left to binary logs
Recently I configured master-slave replication for my production with out considering all the
user cases. I am started on all the possible use cases at hard ware level again to ensure we will be ...
1
vote
1answer
380 views
MongoDB: Fixing ReplicaSet Error on reconfig - “Server::doWork task:rs Manager exception:unauthorized db:local lock type:2 client”
Question: How do I fix my servers and get them back to the normal ReplicaSet with no error messages?
I'd offer a serious bounty, but all my points are on SO :(
Details of the Problem
I'm running a ...
0
votes
1answer
55 views
Is it possible that newer data is overwritten by old after MySQL replication slowdown?
I've set up master-master replication of 2 servers and in one of the tables I use REPLACE INTO to update the data in a table. Is it possible that a link between the 2 servers goes down, then server 1 ...
0
votes
1answer
129 views
Remote to remote block level replication
I have to sync 2 iSCSI LUNs together at block-level (mandatory), asynchronous, only in the night, I found some tools to do it when Remote to Local or Local to Remote, but I cannot install anything on ...
4
votes
18answers
4k views
How to Eliminate Tape Backup and Off-site Storage Service?
PLEASE READ UPDATE AT THE BOTTOM. THANKS! ;)
Environment Info (all Windows):
2 sites
30 servers site #1 (3TB of backup data)
5 servers site #2 (1TB of backup data)
MPLS backbone tunnel connecting ...
0
votes
2answers
293 views
How to move the files of a replicated database (SQL Server 2008 R2) to a different drive
I would appreciate if someone could help me with the following problem:
We use two SQL Server 2008 R2 databases under transactional replication: transactional publication with updatable ...
4
votes
2answers
214 views
Possible to make mysql server both master and slave?
I am getting ready to move a database from one server to another. In order to reduce downtime for the client, I am wondering if it would be possible for me to turn on replication and give it time to ...
0
votes
2answers
246 views
SQL Server Snapshot Replication Subscriber (Editable or Read-Only)
I need to create a copy of my SQL 2008 R2 Enterprise database and have it located on the same server as the original. I will be using this second copy of the database as the target of a mostly ...
2
votes
3answers
179 views
MySQL to PostgreSQL replication
Is there way to replicate in near-realtime MySQL changes to equal PostgreSQL database?
