For questions about database mirroring - a technology used to create and maintain an exact copy of a database, synchronously or asynchronously.

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Mirroring failed over - created 2 principal database and will not allow me to drop one of them

For some reason my mirrored servers triggered an automatic failover. I have 2 databases that both think they are the principal server, one is "Principal, Synchronized/In Recovery" and the other is "...
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3answers
425 views

Make a Copy of a Microsoft SQL Server 2005 database from a Mirror Copy

I have a SQL mirror database in Microsoft SQL Server 2005. I would like to get a copy of it as a new database so I have the ability to read, write, and backup the database. I cannot break the ...
2
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0answers
132 views

Change Data Capture not running when Mirror is Suspended

We have 2 SQL 2012 SP2 Enterprise servers that have some mirrored databases. One of these databases also has CDC enabled on a number of tables so that we can run some business logic when there are ...
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3answers
2k views

Standard Edition High Availability without Shared Storage

I'm a software dev with little experience managing SQL Server so please bear with me. We are developing a piece of software that needs to be highly available, with a significant degree of resilience. ...
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2answers
1k views

Mirroring Database tables and views on SQL Server Express

I need some idea on how to mirror all table and views in my development server to my demo server. Both servers are running SQL Server Express. I have tried it manually but it's very time consuming. ...
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1answer
1k views

SQL Server database Mirroring on different servers

I tried to perform SQL Server database Mirroring(with SQL Server 2008R2). And I got success to perform mirroring with "High Safety" mode. And for that I have used three instances of SQL Server ...
2
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1answer
1k views

Replication of a remote MySQL database to local MySQL database

I'm the developer of my employers corporate private website, a HTML5/PHP/CSS powered site for company reports etc. The site, hosted on a shared hosting package, connects to a remote read-only MySQL DB ...
4
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2answers
272 views

Impact of deleting 100GB table on Mirroring

I'm about to delete a large table which is approximately 100GB in size. I'd like to understand the impact on the mirroring that's in place on this db. Can anyone confirm?
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1answer
547 views

Why Are My Mirrored Databases Changing States on Their Own?

Setup: SQL Server 2005 w/SP4 64-bit Standard for all three servers Windows Server 2008 R2 Enterprise w/SP1 64-bit for all three servers 01 is designated as the Principal 02 is designated as the ...
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1answer
802 views

Mirror failure after windows updates - possible cause?

Over a dozen SQL Server mirrors had windows updates installed this morning - 2 of which developed serious faults afterwards. The windows updates installed where: KB2939576 KB2957189 KB2957509 ...
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1answer
126 views

Database slowdown at random times using mirroing

Our web application suffers DB query timeouts a few times a day at random times. Can you help to work out the cause, e.g. deadlocks, mirroring (disk or network), etc? We have two identical database ...
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1answer
605 views

Database Mirroring and Replication in SQL Server 2008 R2

I have configured the mirroring and replication between 4 servers (A,B,C,D).i.e, Mirroring between A to B and C to D, Replication between A and C. The configuration was a success and I am able test ...
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0answers
56 views

What happens if SQL Server mirroring fails over and during synchronisation?

I have two sql boxes, one primary and one mirror. The mirror stopped synchronising last night for about 12 hours and so now the primary is transferring about 25GB of logs that built up. However it'...
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27 views

Any way of checking mirroring monitoring whilst the primary is unavailable?

I have two sql boxes, one primary and one mirror. The mirror stopped synchronising last night for about 12 hours and so now the primary is transferring about 25GB of logs that built up. It's now ...
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1answer
151 views

SQL Server USE ignores IF block

I want to shrink the transaction log file of several databases using a maintenance plan. Those databases are mirrored, therefore the shrink task cannot be executed on the MIRROR databases, but the ...
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0answers
430 views

Mirror database on same server instance for better read performance?

I am developing a somewhat big web application, which uses data which is aggregated using a crawler. The crawler is constantly writing to the database and updates many tables at the same time. For the ...
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0answers
562 views

SQL Server: mirroring several tables in different databases

I want to keep several tables in two different databases mirrored. Both databases are within the same server, and both are SQL Server dbs. This mirroring only affects the data they contain, not the ...
3
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1answer
71 views

Safe to start Mirroring on Production Server?

We have a 350 Gig DB on SQL Server 2008. We intend to backup and restore it then immediately start mirroring. Is starting a mirror a dangerous operation to do on a production database ? Can I expect ...
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2answers
1k views

Mirroring between two Ms-sql servers for Migrating server from one Datacenter to other Datacenter

I have a query about microsoft sql server. I'm looking for migrating ms sql server from one vendor to another vendor(Datacenter). I'm looking to have a mirror configuration between servers since my ...
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1answer
48 views

Failover Mirror

My name is Jackson and I'm from Brazil, sorry about my English. My question is about the failover process in SQL Server Mirror. Question: If just the database, not a instance or a server, goes ...
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2answers
5k views

SQL Server Database Mirroring is going to die. How can I guarantee high availability now?

The Database Mirroring feature of SQL Server is going to die: This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan ...
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1answer
81 views

Can't set up mirroring for a specific database

We have several databases. All of them are mirrored. Until now, we never had issues with this. One database had some problems, and now when we try to enable mirror again, it just stops. Message in ...
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2answers
527 views

Ola Hallengren with database mirroring

I am about to setup Ola Hallengrens database maintenance plan. We have our database mirrored and I was just wanting to know if I need to run the script on both my Sql Server instances or only the ...
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2answers
189 views

Having DB Mirroring and Replication together

Can anybody help me understand why do one go combination of Database Mirroring + Replication. Why can't I just have Database mirroring for high availability of my database. What is the need of ...
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0answers
52 views

TempDB causing high IO writes - dependent on server's max memory setting [duplicate]

I have a mirrored SQL Server 2012 database. The first server has a hugh tempdb write IO load when the maximum memory limit is set above 8192 mb. These 8192 where the original setting for both the ...
3
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1answer
318 views

Can you restore log file backups to a mirror database after failure?

Purely a theoretical question as I've been considering possible DR scenarios... In this scenario: The link between a principle and a mirror server becomes unavailable for a period of time (e.g. ...
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2answers
4k views

Should I pause Mirroring and stop SQL Server services before running windows updates?

I am running Windows update on my SQL Servers (which are in a Principal-Mirror partnership, in High Safety mode). I am starting with updating the mirror and I was wondering, to increase safety, ...
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0answers
342 views

SQL Server Mirroring send/receive ack time not normal

I have a problem that arises during the performance test by microsoft team in my client. The report that is given to us provide information about whether or not a parameter is good based on the Object ...
0
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1answer
296 views

ERP (Oracle) real time backup [closed]

I work in a small company, that runs an ERP that holds about 600MB of data. My task at hand is, to find a way to always have real time backup of the erp (Oracle 11g) that can be retrieved easily (so ...
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0answers
42 views

Data mirroring suggestions

On my test environment, I have a SQL 2012 2-node physical cluster that accesses a common iSCSI storage on a separate Windows Server 2012 box. What options are there if I want to backup this storage to ...
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0answers
752 views

SQL Server: Principal DB becomes unavailable after problem with mirror DB, even with Set Partner Safety Off?

We've got a very simple mirroring setup here: just a principal DB and mirror DB, no witness, running in high-performance mode with SET PARTNER SAFETY OFF. This problem has happened to us twice now: ...
6
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2answers
3k views

Mirroring in SQL Server 2012

I've got newly installed Win 2008 R2 machines, in a workgroup, in the same subnet, and of course SQL Server 2012. I allowed login with SQL Server authentication, thinking it may help with each ...
2
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0answers
347 views

database mirror problem with Network Service account

I have two SQL Server 2008 R2 instances installed on same Server and the engine log on as Network Service account which is set by installation. there is a database TestDB on both instances. I try to ...
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2answers
824 views

Snapshotting Database Tables

I have a reporting database (in SQL Server) that takes nightly snapshots of the production data (Oracle) for users to query against for the next day, but now the requirement is getting to be that they ...
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1answer
921 views

Database failover/failback history

I am a SQL DBA newbie, and I am trying to get the failover/failback history for one of our mirrored servers. I am able to get the the failover history from event viewer but do not know how to the get ...
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2answers
9k views

Best Possible Solution for Reporting Mirroring or Replication?

Hi I have SQL SERVER 2008R2 Data Centre Edition and I use SSRS and a Vendor application for reporting. I have a Reporting Server where we backup and restore everyday from Live Server to have Data ...
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1answer
420 views

Database Mirroring and Snapshots

As part of a SQL Server deployment, it was proposed to use Database mirroring as a redundancy option as well as allowing for Reporting and MI to be detached from the Operational DB. The proposal is ...
5
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1answer
2k views

Failover scenario with principal “hard down”

My company has a failover pair of SQL Server 2005 instances, which provide database availability for a UL-licensed alarm/call center, where uptime and availability are critical for life safety. Here'...
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1answer
2k views

Troubleshooting Mirroring Configuration

I am configuring database mirroring on SQL Server 2012. After configuration I am getting the following error when attempting to start the mirroring session: tcp server cannot be reached or does ...
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2answers
336 views

sql server-mirroring 3 sql server

we are developing an application for a company and this company has 3 branches, we design a SQL server for our application we can put this server in one of the branches but as the connection between ...
4
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1answer
529 views

SQL Server DR, mirroring or virtualise and mirror

I have a client with a small business server 2008 Premium installation. This obviously includes SQL Server 2008 standard on a separate 2008 server. On the SQL we run several line of business ...
5
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1answer
593 views

Changing autogrow settings with database mirroring

Recently I changed the Autogrow settings for some of the databases on our SQL Server 2008 R2 server. These are involved in a database mirroring configuration, with the principal on SERVER1 and the ...
0
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2answers
381 views

Update primary SQL Server in mirrored environment using transaction logs from old environment

I'm currently migrating a large (~40gb) database to a new environment. The new environment is a HA/mirrored set up with primary, mirror and witness nodes. I'm backing up the database in the old ...
0
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1answer
186 views

Configure SQL Server Database for High Availability & Warehousing

I have 3 DB servers (DB1, DB2 & DB3 - all on Win 2008 R2 with SQL Standard 2008 R2 in the same datacenter). Let's assume AdventureWorks as an example database. My goal: - Setup DB mirroring with ...
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0answers
21 views

SQL Server 2008 log file growing and wont shrink. Hard Drive Space running out [duplicate]

I have a SQL Server 2008 database which has a log file (.ldf) with a size of 360GB and growing every day. The .mdf file is only 25GB. The hard drive is 950 GB and has 150GB free space. I want to ...
2
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1answer
424 views

SQL Server full safety mirror commit overhead less then Time to send?

How is it possible that the time to send value is greater then the mirror commit overhead? The mirror operates under full safety so this means that the commit is only done @ principal when the commit ...
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2answers
653 views

Replicating schema changes between production and development databases [duplicate]

Not too sure if this would be a good and proper way to go about things, so I apologize if I'm kind of far off. Currently running Microsoft SQL Server 2005, and in this we have a database for a ...
2
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0answers
1k views

Failover only working for Classic ASP, not ASP.net [closed]

Setup: All machines run Windows Server 2008 Enterprise SQL Server 2012 Standard (Primary) SQL Server 2012 Standard (Mirror) SQL Server 2012 Express (Witness) Root issue: Our ASP.NET application is ...
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3answers
434 views

Should we periodically 'refresh' the mirrored copy of a SQL Server database?

When you have SQL Server mirroring set up, do you trust that your mirror database will stay the same as the primary, even after months and months of mirroring?  I know we all check the status, ...
5
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3answers
2k views

How to reduce network latency during mirroring?

We are using SQL Server 2008 R2 Standard edition for mirroring. But we found out that network latency is too high. It takes nearly four times time to complete a transaction while mirroring is active. ...