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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Are Database duplication and Mirroring one and the same? [closed]

I am going over the concepts of Distributed database management system. I read about duplication and replication. Then there is also something called Mirroring. I googled to find if duplication is the ...
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1answer
73 views

Microsoft SQL Server AG Synchronous Mirroring is not synchronous

We were upgrading to SQL Server 2012 and decided we wanted to divorce ourselves from replication we were using for Reporting services on Node 2. AG and mirroring looked like a good solution -- and we ...
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2answers
27 views

DB Mirroring setup?

I have done a SQL database mirroring setup. There is a Sql job which takes continues full database backup daily. Should I stop this job ?
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1answer
56 views

SQL Server Always ON

We have a SQL Server 2008 R2 cluster with 2 node and total data is about 2 TB now that cluster is log ship to 4000 Miles another data center. I know about a 2 years back we have mirroring setup ...
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26 views

Manual sync between 2 SQL server databases [duplicate]

I will not go in details and explain everything. For some (not good) reason I need to maintain 2 databases synchronized together. The full database schema may be different but not on table I want to ...
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1answer
43 views

Can mirror and witness have same port number? [closed]

When configuring database mirroring, the mirror and the witness have generated the same port number. When I hit next, it errors out with: End points for instances for the same server must use ...
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2answers
64 views

Strange Database Mirroring Problem

I am noticing a strange problem with DB mirroring on SQL Server 2012 (standard edition). The mirroring is set up, and successfully established, and working. There is no witness. Once principal is ...
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1answer
19 views

SQL Server MIRRORING - FAIL ON SECONDARY

I have a problem in the SQL Server Mirroring. Current system: Server: S1 (Principal) & S2 (Secondary) Databases: D1 (2.5TB) & D2 (20GB) Situation 1: without witness 1. D1 & D2 were ...
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2answers
65 views

Quickest way to migrate mirroring to AG

Scenario is this, prod is two two node FCI with mirroring (primary/disaster DC). This is working just fine. New hardware is coming and a version upgrade to SQL Server 2012 (from 2008 R2) in the form ...
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0answers
67 views

Trouble setting up mirroring on SQL Server 2016

I've setup a test SQL Server 2016 server. I've installed 2 instances, restored a backup on the primary. Then restored a backup on the secondary with NO RECOVERY, then restored the transactional log ...
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2answers
104 views

What is the cheapest way to mirror/replicate data to multiple servers on SQL Server?

I have an SQL Server 2014 Enterprise Edition with a lot of data. I would like to mirror the data from that to at least 3-4 servers. The mirrors are all SQL Server 2014 Standard Edition (no more ...
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1answer
53 views

False-failures when mirrored in high-safety mode without a witness

A number of DBs are mirrored in high-safety mode without a witness. I'm trying to understand what might happen in the case that a DB (or DBs) experiences a false-failure while the primary server ...
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1answer
40 views

Error when trying to start Mirroring

Thanks for looking at this, and thank you in advance for any answers! I am attempting to start a mirroring session, but I am getting an Error 1418, which basically states that the TCP port doesn't ...
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1answer
50 views

Is it good idea to use RAID 1 mirroring to back up database content

I'm working on web hosting project. The planned system structure is going to be like this: one main hard-drive will contain the binary of mysql. A second hard-drive will contain the datadir the ...
2
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1answer
108 views

High Availibility Solution to send data to multiple locations

I inherited a very interesting environment and I'm tasked with finding and implementing High Availability/Disaster Recovery solution as soon as possible. Simply speaking our environment looks like ...
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1answer
27 views

Scenarios in which you might need to restore large number of databases at once?

I've seen several online sources mentioning that you should always have a restore script automated for the possible need to restore a large number of databases at once and quickly get back up and ...
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20 views

Mirror Suspended - can't detatch

We have a site where they have MS SQL 2005 and we are mirroring a database. At some point around Xmas it's stopped mirroring after an unscheduled reboot. Trying to resume just throws an error, and ...
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0answers
53 views

Shrinking a physical transaction log file on a mirrored database

I have 2 SQL Server 2008 Standard Edition instances that are mirrored. Both instances are running Service Pack 1. I run Full backups daily and transaction log backups every half hour (through ...
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2answers
108 views

SQL Server Backup transaction error

Hi I am attempting to backup the transaction log file to setup mirroring in SQL Server I execute BACKUP LOG CUSTOMER TO DISK ='K:\JonDB\CUSTOMER.trn' WITH INIT GO And I receive Processed 6587361 ...
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Database Mirroring: Cannot set witness in Microsoft SQL Server 2014 using Azure

I am using Azure. I am unable to connect to a witness server though Microsoft SQL Server 2014 for database mirroring. Everything I have researched seems to point to this article https://support....
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32 views

Why am I getting this network error when setting up database mirroring?

I have two servers, one in the Portsmouth, NH datacenter, one in the Kansas City datacenter, same domain. Trying to set up mirroring. First, does it matter that one server has Windows 2008R2 server ...
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1answer
38 views

turn off (synchronized) database

I just found a database, and I have no Idea what to do. I can't drop, update, or anything. The database is in this state: How can i turn it off? Because, it's already off ! I tried to restore ...
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1answer
83 views

Recommended mirroring alternative?

SETUP 2 Amazon EC2 SQL 2014 servers in different availability regions. Synchronous mirroring S3 for archiving full backups & logs at night Right now for simplicity, nightly full compressed ...
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2answers
39 views

Database mirroring with fixed set of tables without sql server replication

We have requirement of mirroring the database with some fixed set of tables. We do not want to use sql server replication for that purpose. Do we have any solution for that or any software for this ...
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0answers
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CPU utilization reached 100% after changing OS time on SQL Server with Mirroring configured for a database

We have configured mirroring on SQL database server. Suddenly principal database server reached 100% CPU, windows log events shows following 2 logs This event is generated when the system time ...
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1answer
269 views

Should I pause mirroring when I reboot the witness server?

So I know that when patching the two main database servers (SQL Server for the record) you do the mirror, failover and then when it's all caught up do the new mirror, but what about the witness box? ...
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1answer
112 views

Backing up to Nul on an SQL Mirror

I've seen and read a lot of questions about the transaction log and I know that backing it up to nul is usually frowned upon, however my understanding is that this is from a data recovery perspective. ...
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1answer
61 views

Can't mirror SQL Server 2012 database

I'm trying to set up database mirroring with SQL Server 2012 STD, but can't get it to work. Got this error: The server network address "TCP://sql2.fea-rp.local:5022" can not be reached or does not ...
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Split Mirror Backup in db2

In my database apart from storing the daily backup, the disks are getting used for other purposes also. So how can I do the disk mirroring for Split Mirror Backup if I don't use external storage?
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63 views

Application trying to connect to mirror DB randomly

We have a couple of SQL Server 2012 instances involved on mirroring without witness and operating mode is asynchronous in all cases and we do not use witness, so there is no automatic failover. JNDI ...
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1answer
31 views

Endpoint modification in SQL Server mirroring

I have three SQL Server 2008 R2 machines which are configure to be Principal, Mirror and Witness. I need to move them to another subnet, therefore their IP addresses will change; and i had configure ...
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1answer
45 views

Two SQL Servers cross-mirroring each other?

I'm looking to see if I can create a "Brother's Keeper" environment in SQL Server 2008 Standard Edition. I have a large number of databases across multiple servers. I'm not worried about scalability ...
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137 views

Unexpected server behavior with SQL Server

Production server inexplicably responds. Server runs on Windows Server 2012 Hyper-V. There is also identical to the DR server. On Server stores the production base, and is configured and Mirror ...
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SQL Server agent error on a the mirror database

I configured mirroring on one of my databases. The database is in a SQL Server cluster. The mirroring is working great, but all the jobs that set to run fail. The error is: Date 9/10/2015 8:...
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1answer
82 views

SQL Server 2012 Mirror in a Disconnected state - how do I fix it?

We had a hardware failure last night and we got our servers up and running. After logging into SSMS I find all the mirrored databases in a disconnected state. I've done some searching with google-fu,...
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1answer
64 views

SQL Server 2012 - Can't detach database on mirror server

I'm running SQL Server 2012 in a mirror configuration and I need to move the mirror's transaction files. I deleted the mirror setup on the primary but I can't detach the databases on the mirror, the ...
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1answer
223 views

Sql Server Mirroring Failover and Failback

I have the following mirroring setup for DR. Principal (ServerA) Mirror (ServerB). When we do a DR test we do manual failover from Principal (ServerA) to Mirror(ServerB), so now: ServerB is ...
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148 views

SQL Server 2008 R2 - Two Files Stuck In Restoring Status

Background: SQL Server 2008 R2 mirrored and clustered. We recently failed over the databases via mirror and everything went smoothly. When it was time to do a differential backup, I got an error so I ...
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1answer
555 views

Propper way to monitor SQL Server mirror status from service or job?

We have a production DB which is in a mirror configuration. It is in synchronous high safety with automatic failover configuration. Right now we monitor it using windows service which pings it. Is ...
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0answers
73 views

Mirroring won't fail back

Got an interesting mirroring issue. I am using SQL Server 2008 R2. Server A mirrors 8 databases to Server B ideally. Right now the 8 databases are principal on Server B (otherwise healthy). When I ...
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1answer
52 views

Replace/upgrade mirrored server hardware

We are deploying new VMs for a mirrored database that is in high safety mode with automatic failover and also going from SQL Server 2008 to SQL Server 2008R2. Most of the documentation I've come ...
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SQL Server Mirroring Removed

Does anyone know how to tell when SQL Server mirroring was removed from a database? My log file is flooded with login failures but I can't find mention of removing of a mirror. Is there any DMV way ...
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2answers
789 views

SQL Server 2008 R2 Mirroring issues

I have this very frustrating problem that I've been trying to figure out for almost a week now. I have two SQL Server 2008 R2 STD w/SP3 box running on Windows 2012 R2 with two instances each, Server1 ...
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1answer
63 views

Safe delete Transaction Log in SQL Mirroring scenario

We are using SQL Server Mirroring with a witness (High Safety mode) and we see the transaction log on the Principal Server has grown around 20 GB in few weeks. I looked around on SO and google for ...
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296 views

Could not redo log record on mirror

One of my database mirrors is in the suspended state today and the error log on the mirror shows the following. Could not redo log record (338934:102862:477), for transaction ID (0:848150408), ...
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58 views

Mirroring DB failover, and found Schema different

I set two database mirroring with Safety OFF. Once I do failover to mirroring DB, I found there are some Stored Procedure Schema different. Does anyone have same problem before ? What is the root ...
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40 views

Endpoint acting as a mirror and witness?

Let's say I have 4 SQLServer 2012 R2 divided into two mirrors: SQL1-1 with its mirror SQL1-2. The Witness is SQL2-2. SQL2-1 with its mirror SQL2-2. The Witness is SQL1-2. The mirorring has been ...
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2answers
140 views

SQL Server 2012 and DBM

Why would MSFT would deprecate mirroring from 2012.. I understand alwaysON will replace it but then SE users are left with nothing..no alwaysON or dbm from future releases.. Just analyzing from end ...
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Transactional publication and database mirroring considerations

I've recently taken over a project, and with it comes 2 backends. 1st is the production services backend and the 2nd is a reporting service backend. Both of which are 2008r2 instances. The production ...
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1answer
180 views

Mirror db from production to test and acceptance nightly or weekly

I have read this Easy or Schedulable way to move data from Production to Test and it seems not automated. I would like to have a daily or weekly push of my production server data to one or two (remote)...