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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When I implement database mirroring in SQL server it shows an error

When I click the start mirroring button it shows the below error message. When I try to connect the mirror and witness server through management studio it's connecting and working fine. The user I am ...
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0answers
49 views

How To Roll Back DR Transactions Without Breaking Mirror

We have a full data center DR test coming up and will need to fail over all of our SQL Server databases to the DR site. The majority (>80%) of our databases are SQL Server 2008 R2 using Database ...
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1answer
58 views

SQL Server 2008 commit overhead warnings

I have four mirrored user DB's on a pair of Server 2008 R2 machines. My Db engine is SQL Server 2008. Of the four Db's one is warning me of overhead commit latencies ( > 20ms). From some research on ...
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1answer
191 views

SQL Server Mirroring (with Witness) and Client Timeouts

Can you explain what happens in this situation. Imagine I have a Sql Server Mirroring set-up with 2 databases and 1 witness. Database clients have in their ConnectionStrings the Principal= and ...
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1answer
88 views

DR option for SharePoint databases? ideas and experiences

First let me clarify that I am not looking for thoughts in terms what is the best or the bad options for a DR for SQL Server. I am just looking for for inputs from experienced people. We are running ...
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2answers
278 views

migrate db's - best way to mirror or replicate a full database

I would like to mirror/replicate my databases to the cloud. The cloud is setup using VPN to my actual machine. I am a bit confused by the options I have and would like to get some light into it. My ...
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1answer
69 views

SQL Server 2008 R2 - Moving nodes in mirrored environment

Was hoping that I would find this documented somewhere, but I've searched and searched. Finally asking the question myself: I have SQL Server 2008 R2 in a HA setup (primary/mirror/witness) I want to ...
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150 views

Backup Mirror database

I have database mirroring setup between two SQL 2012 servers in two different datacenters. For testing purposes in the "mirrored" datacenter I would like to create a working copy of the database. ...
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315 views

How to clean DBMIRROR_EVENTS_QUEUE process on broken mirror?

We setup mirror (on SQL Server 2008 R2), but it fails during the setup. After that the mirror was moved on another server. My problem is that it left some process, because on that server I see active ...
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1answer
129 views

SQL Server : Restoring database mirroring once its turned off

I was running security updates on the sql server mirror setup and I encountered split brain scenario as mentioned here Should I pause Mirroring and stop SQL Server services before running windows ...
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1answer
200 views

Microsoft SQL Server 2012 Mirrors Go Into Disconnected

I have some Microsoft SQL server 2012 mirrors, without a witness in asynchronous mode, that are sporadically going into disconnected. I am running SQL Server 2012 11.0.5058. Looking at the logs on ...
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1answer
481 views

SQL Server Mirroring can't connect to mirror database

I am at my wits end with this. I am trying to set up mirroring between a development server and my local machine. The error that keeps coming up is: Msg 1418, Level 16, State 1, Line 1 The ...
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2answers
52 views

Does a mirroring configuration requires the database do stop receiving requests?

I want to configure a SQL Server 2012 Mirroring. I know that I have to create a full backup of the Principal server and restore it at the Mirror server. After that, I will backup the transaction log ...
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1answer
121 views

How to safely resume a SQL Server Mirroring scheme that had a expired certificate?

We have a production database with a SQL Server 2012 Mirroring scheme with three machines: Principal, Mirror, Witness. The mirroring was configured with a certificate that had only one year of expiry ...
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1answer
304 views

AlwaysOn AG - CPU limitations

I’ve been trying to find out if the same CPU limitations database mirroring has apply to Availability Groups. My guess is that the same limitations exists, given that Availability Groups was built on ...
2
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1answer
196 views

Replication throw an error after failover mirror partner is down in SQL Server

Received an error mentioned below after failover when mirror partner is down. Error : to fail over to a database which is not configured for database mirroring. code: 22037, text: 'Invalid ...
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1answer
380 views

Should I use Database Mirroring?

So I have the following scenario on my hands: I have a product database that runs for a specific app, all inserts into the database come in through three separate connections. Recently I have ...
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1answer
1k views

SQL Server 2008 R2 Readable Mirror

I know that SQL Server 2012 and 2014 offer AlwaysOn Availability Groups which provide this functionality, but I'm still stuck on SQL Server 2008 R2 for a while. I recently came across this AWS ...
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2answers
453 views

Best DR strategy for MS SQL Failover Cluster [closed]

I have... 2 database servers 1 shared SAN storage 2 MSSQL 2012R2 (Standard) server instances (2 SQL Failover Cluster) Server A is the primary node for SQL Instance A Server B is the primary node for ...
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2answers
1k views

Detecting and fixing database corruption on SQL Server mirrored database

I’m new to my current company and we have a System Administrator but no DBA. In the past I’ve taken care of DBA related issues at other companies. I’ve run into and corrected database corruption in ...
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2answers
3k views

Best way to migrate a huge SQL Server database with low downtime over network

Problem definition Our database server needs to be transferred to an other datacenter. It runs on Microsoft SQL Server 2012 Enterprise (64-bit) and contains two databases of about 2TB and 1TB. ...
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1answer
81 views

What precautions to take when moving a mirrored server

I have a SQL Server 2008 R2 mirror setup running in high safety with automatic failover (synchronous, witness). Over two different nights, the mirror and the primary will be shut down and re-racked. ...
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48 views

SQL Server Mirroring with Certificates

I'm struggling with setting up mirroring with the following configuration: Server 1 running SQL Server Standard 2008 R2, Principal Server 2 running SQL Server Standard 2008 R2, Mirror Server 3 ...
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0answers
256 views

Set up sql server db mirror specifying IP address for mirroring_partner_instance

Ok. I run: ALTER DATABASE DbName SET PARTNER = 'tcp://10.0.0.0:5022' Command completed succesfully Then run SELECT DB_NAME(database_id) AS 'DatabaseName', mirroring_partner_instance FROM ...
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119 views

Why database replication fails when database mirroring is broken?

I'm trying to understand what effect database mirroring can have on replication in SQL Server 2008. Here is current environment: (don't ask me why it was done this way or to change it) Server A: SQL ...
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1answer
125 views

Effects of turning the transaction safety OFF

I am considering to turn off the transaction safety to maximize the performance. Before that i am interested in finding the current status of transaction safety. Is there any command that we can get ...
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1answer
485 views

Enabling TDE without breaking existing mirror

I've been trying to enable TDE in a mirrored SQL Server 2008 R2 configuration. Enabling TDE is not so difficult, though when I enable TDE on the principal, the mirror database goes in to a suspended ...
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1answer
4k views

Mirroring SQL error log - Error: 8474, State: 11

I'm getting these errors in SQL error logs: An error occurred in a Service Broker/Database Mirroring transport connection endpoint, Error: 8474, State: 11. (Near endpoint role: Target, far ...
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1answer
247 views

What data gets passed between mirroring principal and secondary?

We are trying to figure out which of the below statements is correct when talking about SQL Server mirroring: The master database server executes the query, and takes the resulting transactions and ...
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1answer
263 views

Multi Session Mirroring using 1 witness server, cannot find certificate

I am trying to use 1 witness server for 2 mirrored databases that reside on different servers. For example: db1 on server(A) mirrored to server(B) using witness server(1), and db2 on ...
2
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1answer
415 views

SQL Server Mirroring and automatic failover - why don't all DBs failover to the mirror?

On SQL Server 2008 R2, I'm mirroring 20 databases on my SharePoint SQL Server with a witness, high-safety. All mirrored DBs have the default mirroring_connection_timeout = 10. And, occasionally, a ...
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499 views

SQL Server spending a lot of time creating sp_dbmmonitorupdate

I have an SQL Server 2008 R2 Standard with around 80 databases, 18 of which are a synchronous mirror primary. I'm having a lot of complaints about database speed lately, so I've started digging with ...
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42 views

MySQL: migration huge tables between two databases

Hello guys (and sorry for my English). I have 2 DB's - DB1 (staging) and DB2 (production), each day some contend added/changed in some tables in DB1 and should be moved to DB2. Right now it works ...
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2answers
283 views

Deciding on a replication strategy

We have several dozen small-medium (<1Gb) databases on our SQL Server 2008R2 (Standard Edition) server, with one or two more being created every month. The server itself is a fairly well spec'd box ...
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1answer
174 views

user mapping is droped after swithing from principle server to mirror server

I have principal server:A and mirror server:B with DB Name: "DBTest" On the server A there is a username (SQL auth.) call: user1 and is mapped to "DBTest". the Same is on Server B, same username and ...
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78 views

mirroring on sql server 2012 on different windows server 2012

I have 2 servers *.203 and *.205 I have sql server 2012 on each of them I tried to make mirroring between them every thing goes successfuly but when I tried to start mirroring it gives me ...
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1answer
92 views

many Servers of SQL server 2012 needs mirroring

I have two SQL server 2012 instances and I want to configure mirroring between the 2 servers with database. My questions are: How can it automatically change host of one if the other one was dropped ...
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1answer
59 views

many Servers of SQL server 2012 needs mirroring [duplicate]

I have now simply 2 SQL Server 2012. I want to configure database mirroring between the 2 servers. My questions are: How can it automatically change host of one if the other one was dropped ? Is ...
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2answers
823 views

What happens in this strange SQL Server Mirroring situation?

Let's assume that two SQL Server instances (S1 and S2) are in synchronous mirroring or in a synchronous Availability Group. Now the following happens: A write happens on S1 and transaction commit is ...
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0answers
702 views

SQL Server mirroring causing issues

So we have a couple of SQL Server instances involved on mirroring without witness and operating mode is asynchronous in all cases. After we set put mirroring in place, we started facing connections ...
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577 views

SQL Mirroring synchronize logins and agent jobs

We have just started using SQL Server mirroring for several clients on SQL Server 2008 R2 Standard. We've got the SQL Server mirroring working fine however now we run into the issue of replicating ...
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2answers
299 views

How can I restart Database Mirroring after intentionally breaking it?

I have SQL server mirroring on two servers. I have Enterprise Edition on the primary server and Standard Edition on the secondary server. In order to verify the data on the secondary server I ...
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1answer
141 views

SQL Server Replication w/o network connection

Is there a way to use SQL Server Replication without a network connection? My would-be publisher is an SQL Server 2005. It is on the "outside" as it is connected to my company's primary LAN, which is ...
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1answer
484 views

What is the possibility that mirroring a database will damage, corrupt, or erase either the primary or target database? [closed]

The last time my company had tried to mirror some databases, everything worked great until one morning they came in and the primary database in one of the mirroring schemes was just blank. They had ...
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165 views

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
400 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 ...
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0answers
118 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 ...