Replication/database Mirroring
Dec 28, 2006After reading about it, i'm still confused. Is replication and database mirroring the same? they seem to accomplish the same thing.
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Database Mirroring && Replication Considerations
Jun 21, 2007Hi all,
Can a publisher be mirrored? What are the implications, issues, gotchas? Transactional, Merge or Transactional w/ Updating Subscribers is what I'm considering.
Bottom line is I would like to use mirroring, but only one mirror will not suffice.
Thank you in advance.
Ray Nichols
Mirroring :: Database Replication For A Table?
May 8, 2015We are doing Reporting for a transaction system. since we do not want to hamper the live database we are planning to do the transactional replication.
Few questions for transactional system.
1. If we replicate a database , then what ever changes happened for the source db will be transferred automatically?
for ex: If i change a column name of a table in source system, then will it transferred automatically to the replicated db?
2. If we do any change to any of the tables in source system, do we need to recreate the replication and reload the entire data?
3. Also we are planning to enable cdc on this replicated db to enable incremental load to my warehouse. So if we disable the cdc and do a full load into the replicated db, then do we need to perform full refresh on warehouse?
4. Can we replicate on a table level? so that if we reload only the changed table and then reload then there wont be any impact on the over all flow of other tables.
DR: Replication Vs. Log Shipping Vs. Clustering Vs. Database Mirroring........
Aug 8, 2006Up to now we have gotten by without having any local DR copies of servers (if a sql server goes down we are usually able to get it back in less than 3 hours). But I want more now. I want to trim the "down" window to no more than 5 or 10 minutes. (Immedate failover would be nice but is not an essential requirement. The essential requirement is to loose no data!)
I have a spec of knowledge in these areas:
SQL 2005 Clustering (requires approved hardware, quorum disk, etc. involved)
SQL 2005 Replicaiton
SQL 2005 Log Shipping.
SQL 2005 Database mirroring. ( needs three servers)
Which approach do you think is the most straightforward, sparing of hardware, yet reliable way to get us back up and running after a sql server failure.
TIA,
barkingdog
Database Mirroring | Can Witness Live On Mirroring Server?
May 3, 2008
Server A = primary SQL DBs (mirroring origination)
Server B = failover SQL DBs (mirroring destination)
For database mirroring a witness is required.
Can the witness live in another instance of SQL on server B?
Mirroring :: Database Mirroring Changes In Application
Oct 12, 2015Using SQL Server 2008, we would like propose mirroring between two servers of a critical database. Since we initiate, may require to clarify on its purpose and also required changes from application end.Any changes required from OS Level? (I believe both servers IP or Host name should be added in host entries. Mirroring ports should be allowed/open including Principal and mirror server IP Addresses): Windows Team.Any changes required from Application? (Instance name, authentication: user name and its password should be added in web config files): Application Team.Any changes required from Network Team?Also for mirroring both the principal and mirror servers should be with same version, does it only mean SQL Server 2008 versions are enough or does it also mean to say build numbers 10.00.4000 should also be same.URL....
View 5 Replies View RelatedReplication Or Mirroring
Oct 2, 2007We have a sql server 2000 sp3 server on a win2k3 server standardedition. This is on dell hardware with a dell scsi dasd enclosuredirectly attached. We want to duplicate the hardware and replicate ormirror the database to the backup server and do a manual or automaticfailover in case of outage(more than likely manual). Wondering rightnow if replication - with say software like doubletake - is preferredover sql database mirroring or vice versa. Thanks
View 1 Replies View RelatedReplication And Mirroring
May 22, 2007I am setting up transactional replication on a database A with read only subscriber database B (for reporting purpose). I have also setup mirror on database A. I tried to manually failover to mirror...mirroring works fine but transactional replication is interrupted.
I have followed the steps as in article
http://msdn2.microsoft.com/en-us/library/ms151799.aspx
I have also used PublisherFailoverPartner parameter...but replication still complains that it cannot connect to publishing database.
Any ideas or direction is greatly appreciated.
Mirroring And Replication
Nov 24, 2006Hi MSSQL friend,
We have a SQL2005 server which contains some replicated databases. We use merge replication and the publications are all local.
In order to make the server failsafe we need some kind of mirroring. Is this possible with replication?
Any ideas how to accomplish a failsafe scenario with replication?
Sincerely Edward
Mirroring Vs Replication
Aug 28, 2007Does anyone have an opinion on which is more efficient?
Currently have a cluster setup and I'd like to setup mirroring or transactional replication on top of that to replicate/mirror the data to an offsite building that is still on the local LAN as a DR solution to a SAN failure.
Mirroring And Replication
Jan 14, 2007I'm using replication and want to mirror my publisher to get high availability. As I understand the documentation the principal and the mirror must both use the same distributor instance. So if the distributor fails the replication fails. This seem like a big weakness. Maybe I'm missing some thing. Is there a way to set it up so that replication continues if a distributor fails -- some mechanism that will switch in a "back-up" distributor? I'm looking for a configuration that will continue to run in the event of any single failure. This means that both the publisher and the distributor must be covered by mechanisms that keeps them going in the event of a failure. Mirroring covers the failure of the publisher but I don't see a mechanism that will conver the failure of the distributor.
My application is developed in .net / c#. Data is accessed through .net sql server data provider etc.
Difference Mirroring - Replication
May 14, 2008Hello y'all,
Can someone tell me what's the main difference between mirroring and replication?
Thanks! Kindest Regards
SQL 2K5 Replication With DB Mirroring - Any Experience?
Feb 14, 2008Looking for anyone that has had any experience with using SQL Merge replication while mirroring the publisher database. Thinking about doing this as a recovery plan in the event of a publisher failure.
Any advice would be appreciated.
Thank you!
Replication, Mirroring And Log Ship
Jul 3, 2006dear all,
I have a case.
I have 1 production server and wanto to add 1 more server.
my production server is using sql 2000 stnd edition.
I want to have an indentical database from my production server.
the problem is my second server is using sql 2005 stnd edition.
I have try to use replication but because the my production database didn't have relationship on the database so I can't use transaction replication, I can't use mirroring and log ship too because the sql use the different version.
any idea or suggestion will be great....
regards,
-dedys
HA (High Availability) With Mirroring And Replication
Jan 11, 2008
Here is the situation we are trying to resolve. The client has 2 locations, each has local appliations running on a database. db schema on both locations are the same, data is different and won't overlap.
The requirements are:
1. at each location the application can read and write
2. near zero down time for applications on each site
3. db on one site also has the data from the other site for DR purpose
The client is running on SQL 2005 STD SP2
We looked at the approach of setting up db mirroring on each location + 2-way transactional replication between both locations. The mirroring was fine, and I was able to set up transactional replication from mirrored publisher to a non-mirrored subscriber. But, from what I experienced and from reading, there is no way to have the subscriber db to be mirrored, since Distribution Agents simply doesn't have the option to specify Failover Partnr for mirroring, so I guess it is not supported. Any comments on that?
Assuming that's correct, then the only way of using SQL out-of-box technique seems to be using Clustering on each location instead of mirroring, then the 2-way transactional replication works on clustered subscribers I think (although I haven't tested it). Peer-2-Peer replication would have been a good candidate between sites in this case, but STD version of sql 2005 ruled that out.
Any suggestions and comments are welcome.
Thanks
Data Mirroring Vs. Log Shipping Vs. Replication
Sep 20, 2006Hi everyboby,
Can anybody tell me the differences, advantages and disadvantages between these three solutions? When do I may use one or another?
Could you recommend me any documentation?
Thanks a lot,
Radamante71.
SQL Server 2005 Clustering/Replication/Mirroring
Sep 28, 2007 I am developing an enterprise class solution using SQL Server 2005 and MS .NET v2 and am tying determine if SQL Server 2005 (which edition and if so how) would be adequate for my proposed solution. Any feedback, tips, comments would be greatly appreciated.
As a background the solution I am developing will be web services based and used by multiple offices around the globe by over 500 users. I have already developed a prototype using a single SQL Server 2005 instance but as this solution is going to be used by offices around the world I want to have an IIS Server and SQL Server 2005 server instance in each office with "links" back to the primary SQL Server 2005 cluster in Australia.
One of my thoughts was to set up replication between the offices that would happen at midnight remote office local time and then set up triggers to update the primary cluster when assoociated data was changed on the remote sites or on the primary cluster. Does anyone know or can anyone suggest alternatives to this strategy?
I effectively need some sort of inter site caching functionality with store and foreward capabilities ...
Thanks
Andrew
Mirroring OLTP DB With Transactional Replication To Staging DB
Mar 12, 2007I want to create a mirrored DB set for data entry in a extremely busy OLTP DB. I want to add transactional replication between the production server and a staging server outside my quorum that I will use to index the data and prepare it for reporting and warehousing purposes.
If/when fail-over takes place, what happens to my transactional replication between the former production sever (now presumably offline) and my staging DB? Does it switch to the new production server automatically or do I have to manually set the replication between the new production server and the staging DB?
Thanks in advance.
Mirroring, Snapshot Replication, Load Balancing And Other BIG Questions
Mar 22, 2006You will all have to excuse my ignorance. I'm a developer who also doubles up as a development DBA. I am however not particularly knowedgeable about all the really important DBA stuff.
We've built a small BI solution using SQL Server 2000. Our problem is that our server is getting on in years (5) and doesn't really have enough disk space or grunt. We havce a number of summary cubes that we've optimised quite successfully but our billing line level cubes run to 60 million rows and, well, they're about as quick as a dead ferret. Especially given the stupid queries our data analysts keep running.
We have however proved our point. That this can be done and indeed SQL Server can do it. So we're now looking at some infrastructure spend and some new copies of SQL2005.
But i need some advice. Our user base is climbing through the roof, we originally had 10, now we have closer to 50 and at this rate it'll be a couple of hundred by the end of the year. We're using a plugin called XLCubed to deliver that data into Excel from the Analysis Server.
The OLTP database that sits behind it is fairly robust but we have a number of web based apps (mostly lookup systems) that want to use the nice shiny new accurate tables of data we have created.
So I'm looking at a fairly big server to hold the OLTP DB, this will also serve up live data to our web apps. Its worth pointing out that the source data system is a batch system that processes overnight so we load data from yesterday at 6pm each evening and process our cubes and stuff overnight. Thus the data is a couple of days out of date. Don't laugh they used to use MS Access and got one mangy data set a month so this is a massive leap forward.
I wanted to mirror the DB to another machine but I also want to have a separate Cube Server. I wondered if the cube server could use the mirror to read its data from as opposed to loading the Main Server (the mirror would be an identical box) we would also have a separate box running some of our other systems acting as the witness.
I also wonderd about exporting the Cubes onto file shares for use locally as opposed to via the server which is how they connect now.
We have been using Reporting Services and some of the queries the devs write are not exactly efficient. So I was also planning on clustering a pair of smaller servers into a reporting farm. Could I use another SQL Server to serve data up to them? Could I use a DB snapshot to copy the data required to this server? What are the time / size implications of using a snapshot and replicating it over each night?
Any suggestions for places to read up on this? I've looked at the MS marketing blurb and while its big on buzzwords its light on specifics. Like how it actually works and how you would actually configure it to do some of this and what the implications would be.
Any advice?
many thanks
Steve
SQL 2012 :: Database Mirroring And NT Authority Account For Database Engine?
Dec 2, 2014I have just finished configuring my first test mirrored environment (High safety mode). I setup the database engine service accounts on each of the servers with domainuser. I inherited a production mirrored environment set up by someone else. On the production servers the database engine service account is NT Authorityuser a local account. I am trying to practice installing Windows updates within a mirrored environment and I not sure how to proceed when the service account is NT Authority user account. should I change the service account to a domainuser?
View 2 Replies View RelatedThe Database Is Being Closed Before Database Mirroring Is Fully Initialized
Jun 12, 2007When I issue this command:
ALTER DATABASE foo set PARTNER = 'TCP://10.3.3.1:1234'
I get this error message:
The database is being closed before database mirroring is fully initialized. The ALTER DATABASE command failed.
What does that mean, and how do I fix it?
Database Mirroring Hangs On ALTER DATABASE SET PARTNER
Jun 26, 2005Hi,
View 6 Replies View RelatedDatabase Mirroring Monitor Not Working For One Database
Apr 2, 2008I set up a new mirror server. Everything is good except that the Database Mirroring Monitor is not working for one of the databases. In the monitor the principal data is showing up as blank
If I look at dbm_monitor_data on the principal most of the data columns (e.g. Send_queue_size) are null where as they have data for the other databases.
Both servers are SQL Server 9.0.2047 Enterprise Edition.
Any idea what might be going on here?
Thanks in advance.
Replication :: Server 1 And Server 2 In Mirroring Relationship With Automatic Failover
Sep 24, 2015I'm looking at a setup where they have server1 and server2 in a mirroring relationship with automatic failover.
Server1 is the principalThey are using transactional replication to replicate asingle databse to server3 is AWS.Distribution database is on Server1All Agents (log reader, snapshot, distributor) run on Server1Server2 has not been set up for replication...My understanding is that in this set up you would normallly place the distribution database on a separate server and enable publication on the mirror, Server2.
What happens if they failover? Replication would stop, and presumably records added while the mirror is the active database would not be marked for replication?How would they recover? Failback and reinintialize
Database Mirroring
Oct 12, 2007Hi All,
Does anybody know the OS requirements for Database Mirroring? I checked BOL and Google but couldn't find any info on that.
Thanks.
Database Mirroring
Feb 27, 2008Hi All,
I have read on the web that high protection mode not recommended, except in the event of replacing the existing witness server. But I can't find the reason why anywhere. Can anybody explain? Thanks.
Database Mirroring
Mar 12, 2008Hi All,
Couple of questions about database mirroing.
1. Once the mirroring is setup is it possible to switch between high-protection and high-performance modes? If it is will I have to stop the mirroring, switch the modes and then restart it again?
2. Let's say the principal server went down and I manually failed over to the mirror server. Mirror server runs as a new principal server for a couple of days and then I bring the original principal server back up. What needs to be done in order to bring transactions on the principal server up to date?
Thanks.
Database Mirroring
Mar 15, 2007for a database mirroring , which stretergy is good.
Creating with witness server or without it.?
I am firsttime doing this , so i am posting it to the forum..
and also if we are creating the database mirroring with witness server for automatic failover , will the witness server need the same amount of harddisk space like the pricipal or mirror server.??
thanks
Database Mirroring
Jul 30, 2007we want to migrate our production server , without taking the database down.so what we did was , we mirrored the databases from production to one of our development servers and we took the prodcution server for uprgrade.
so today we are moving back (mirroring) all the databases from that development server to our new production server.
my question is , when i move
productionserver_old(principal server) - having the script for principal server
development server(mirror server---->principalserver)) - having the script for mirror server , which is now acting as principal server
new production server(mirror server) - having the script for mirror server. will become principal server , once i moved all the databases
now while mirroring between the developement server and the new production server, i have to run the scripts for the mirror server only.
so both the servers are havign the mirror script now...
is that a problem, or any other way i can handle this....
Database Mirroring
Mar 21, 2008Hi All,
Does anybody know any good Tutorials for Database Mirroring (Automatic Failover) or Manual Sync with Mirror Server. I tried some sites online, but doesn't have detailed steps..
pls.help as i need to sync data with One of my Mirror using Sql Server 2005.
thanks
Database Mirroring
Mar 14, 2008Hi,
I have some questions about database mirroring. we have almost 40 databases in one server. Can I set up the database mirroring for all the databases. Is it going to any affect on performance. we have already setup the mirroring on almost 30 databases, and I need to set up for the rest of 10. please some body could help on this. Thank you.
Mirroring Between Two Database
Jul 7, 2006Hi,
i'm a novice of sql server and I have a problem.
I have to reply a server in which there are database that are managed with sql server 2000 sp3; what I must make in order to set up the mirroring between the database of the two server so that the data are always aligned ?
thanks for the attention
best regards
alessandro
Database Mirroring
Apr 18, 2007I am new user of SQl and preparing the exam database mirroring....can you tell me how i start the mirroirng ..what is my first tep..and is there only one instance
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