SQL Server Mirroring
Mar 21, 2007
Hi,
We have 2 servers each having a domain (i.e. 2 domains) running
Windows Server 2003
Standard Edition
Service Pack 1
We would like to have one of the servers replicate/mirror the data on to the other but we are getting this error
The error produced from the mirroring part is:
TITLE: Database Properties
------------------------------
An error occurred while starting mirroring.
------------------------------
ADDITIONAL INFORMATION:
Alter failed for Database 'CTSM'. (Microsoft.SqlServer.Smo)
------------------------------
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The server network address "TCP://UM_db_live.UMlive.local:5022" cannot be reached or does not exist. Check the network address name and that the ports for the local and remote endpoints are operational. (Microsoft SQL Server, Error: 1418)
Thank you.
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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?
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Oct 12, 2015
Using 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....
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Sep 15, 2015
I need to set up asyncronous data replication across two clustered instances of SQL 2012 across 2 Datacenters. Both the datacenters have a common domain however the vlans are different. There are only 3 small databases on the primary instance.
any issue in setting up mirroring in this case as vlans are different.
Operating system is Windows 2012.
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Sep 28, 1998
Do you know if the following excerpt from technet is still true? I want to mirror a device over the net to another server. Has anyone tried this with sql server 6.5 or is it still not a feature?
----------------------
PSS ID Number: Q115043
Article last modified on 04-29-1997
4.2 | 4.2
OS/2 WINDOWS
================================================== ====================
----------------------------------------------------------------------
The information in this article applies to:
- Microsoft SQL Server version 4.2 for OS/2
- Microsoft SQL Server version 4.2
----------------------------------------------------------------------
The use of database devices accessed over the network is not a supported
configuration for either the OS/2 or Windows NT versions of Microsoft SQL
Server. All database devices, including mirrors, should be configured to
use local drives. Database dump devices are an exception to this
restriction.
----------------
Thanks.
Gail Wade
Raymond James and Associates
Clearwater, FL
gwade@is.rjf.com
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Sep 24, 2015
I'm looking at a setup where they have server1 and server2 in a mirroring relationship with automatic failover.Â
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
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Jan 28, 2008
Can 1 witness server work for 4 Principal and mirror servers?
Needs expert advise.
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Mar 16, 2008
I have setup database mirroring for one big database.But now Transaction log is full and server is down. What should i do? We do bulk-insert in that database.
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Jul 20, 2007
I am working on a proof of concept to take to our Technical Board.
This POC is concearned with SQL server 2005 Mirroring for High Availability and Failover in a Highly Critical business sector.
The problem is that we use custom web pages to give the Operations Center an overview of the status of the system and that there are so many metrics available (not may are well documented). I have looked at the following
sys.database_mirroring_witnesses
is_suspended to show the state of the Sync
database_name to return the name of the mirrored database
safety_level_desc to show that the Safety level is at Full
Principal_server_name to show the name of the Principal server
Mirror_server_name to Show the Name of the Mirror Server.
I am at a loss as to what is the best approach as I do not want to display too much Information and confuse.
The Servers are locked down to remove any permissions not required so I have to create a SQL account with only acces to the required sys views. one issue is that the following SQL only works on the Principal
Code SnippetSelect * from sys.database_mirroring where mirroring_guid is not null
The Principal returns
Code Snippet
7 267CF8D3-8066-44EA-84BD-B7EA25C3F779 4 SYNCHRONIZED 2 MIRROR 20 2 FULL 1 TCP://DNGLHRSQL051.XX.XX.XXX:5022 DNGLHRSQL051 TCP://LHRSQL029.XX.XXX.XXX:5023 1 CONNECTED 40000000010300001 10 NULL UNLIMITED
where the Mirror will return nothing..
The configuration of the User is identical on both Principal and Mirror and is as follows
Master Public
MSDB Public, dbm_monitor
I have read that the User also requires "view any Database" but on the Mirror this database is not available on the Mirror as it is in Sync.
Is this an undocumented Feature?
Any help greatly appreciated
Regards
Andy
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Aug 28, 2006
i have two computers with Sql server 2000 std edition(SP4) and windows 2003 std edition(SP1).
how should i do to balance the loading of sql server and sync these two servers?
The sql server mirroring means that if one server is down, then the other one will replace it?
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Mar 31, 2008
Hi,
1.) We have a sql server 2000 enterprise edition. Can we implement mirroing on that
2.) If the answer to the above is yes, Can I have mirror and witness as sql server 2005
Regards
skrcmr
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Aug 16, 2006
I am trying to set up a SQL mirroring senario - I have some questions
Do I need to purchase an extra SQL Server license for the SQL server instance on the Mirror? what about the Witness does that also need a separate license/
Can the witness be a virtual server on the Mirror box itself? Do I still require a license if the witness is on a virtual server?
Thanks
jawahar
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Jul 10, 2013
I need to start mirroring the databases without witness server.
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Mar 16, 2007
Hi, im trying to mirror a database with SQL server 2005. I have completed all the setup for this, including attacthing a copy of the principal database and all the other settings. When I completed the Mirroring wizard, it prompted me to start mirroring and when I accepted, it gave to me the following error:
TITLE: Database Properties
------------------------------
An error occurred while starting mirroring.
------------------------------
ADDITIONAL INFORMATION:
Alter failed for Database 'CTM'. (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.3042.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Alter+Database&LinkId=20476
------------------------------
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The server network address "TCP://DBNAME.domain1.local:5022" can not be reached or does not exist. Check the network address name and that the ports for the local and remote endpoints are operational. (Microsoft SQL Server, Error: 1418)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.3042&EvtSrc=MSSQLServer&EvtID=1418&LinkId=20476
Can anyone help me withthe problem.
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Sep 14, 2015
I am unable to add witness server to my mirror configuration. my error log is throwing error'Connection handshake failed. The certificate used by the peer is invalid due to the following reason: Certificate not found. State 89'.
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Mar 9, 2007
Hello,
Is SQL Server 2005 mirroring production ready yet. We have two servers and plan to set up mirroring between them. We have the Standard Editon installed on them.
Is Standard Edition sufficient or does it need Enterprise Edition?
Thanks in Advance,
Sarath R
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Apr 10, 2008
Some how SQL Server 2005 database mirroring was partialy set up on one of my servers. I know this because there is traffic from the server to port 5022 for IP addresses 1.1.1.[234] (which means the last octect is either 2, 3, or 4).
I'm getting complaints from the network manager about the traffic and I want to turn this off, but I can't find any documentation on this topic. I've checked the database configuration and I can't find any configuration for mirroring, just the traffic on the TCP port.
Does this mean a background processes (service) is running that needs to be killed or is it more complex than that...
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May 10, 2006
Hi....
I have sql server 2005 evaluation edition. And This version doesn't provides Mirroring option.Even after installation of service Pack1. Is there any other edition (Freeware or Evaluation) which provides the Database Mirroring.
waiting for the prompt reply.
Thanks
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Sep 21, 2007
Hi
Can anyone please tell me what happens if I have Asynchronous mirroring setup and my Primary server physically dies and not available then what happens?. Does
1. Automatic failover occur to Secondary server?
2. What does the Database state show as. Primary, disconnected?.
3. what happens to my transactions. Are they lost?
4. Does any data loss occur?
If I rebuild a new server how do I sync back my current primary to the new one? In that case is it going to be just a fail back?
Any information is appreciated,
Thank you
AK
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Sep 8, 2015
I develop a website. When I work in local machine for login/logout, The connectionstring works well.
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)v11.0;AttachDbFilename=|DataDirectory|xxxxx.mdf;Initial Catalog=Restaurants;Integrated Security=True" providerName="System.Data.SqlClient" />
But When I deploy the web to IIS server. The I always can't work normally. The system cannot find the file specified..An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ComponentModel.Win32Exception: The system cannot find the file specified
Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
[Win32Exception (0x80004005): The system cannot find the file specified].[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.)]
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Mar 8, 2007
Hello, My question is simply: according to BOL, a DB snapshot taken from a Mirror is read-only. Say I wanted a temporary (disposable) read-write DB created from the snapshot. Is there a way to generate a writable temp DB (that's not tempdb) from the snapshot? Thanks,AK
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Apr 14, 2015
I need to migrate my SQL server Mirror Database to a new server. my current setup is as below
1. server A principal (192.168.1.100)
2. server B Mirror   (192.168.1.200)
Now i have a new server (Server C) to replace server B as below
1. server A principal (192.168.1.100)
2. server C Mirror   (192.168.1.300)
My question is how to migrate mirror db to new server without any affect or downtime on principal server.
note: SQL SERVER 2008R2 EE(64BIT), Win2008R2 EE 64bit.
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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
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Oct 24, 2007
Dear,
Are possible build a solution with SQL Server 2005 Cluster and Database Mirroring? I have the following scenario:
1) Site A
SQL Server 2005 with 2 nodes and active/passive
2) Site B
SQL Server 2005 for Disater Recovery with Log Shipping.
Are possivel change Log Shipping by the Database Mirroring? If is possible, are better:
a) Synchronous(with or without witness)
b) Asynchronous
Thanks a lot! Sandro.
sgpcosta@hotmail.com
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Mar 15, 2006
Hi there.
I´m running some tests in a database with Mirroring and without Mirroring. As expected there is a performance hit using Database mirroring.
The tests i´m running are just simple functions inserting and updating the database, and then counting the number of sucedeed inserts and updates in a time interval.
My question here is: What if i use Sql Server failover mechanism?
I know that failover time will increase and management is more complex, but what can i expect in terms of performance ?
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Sep 27, 2006
Hi All,
I get a general question about the feacture "Database Mirroring". Is it support by SQL Server Standard. Edition without SP1?? Of i still need to upgrade the server from SQL Server 2005 to SQL Server 2005 with SP1?
Another question: are there any problem if the one machine(server) has installed SQL server 2005 Standard edition and the other with "Developer Editon".
I hope some one can answer my question. Thanks anyway!
Regards,
Pat
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Oct 20, 2011
I have setup database mirroring with witness server. To prevent unnecessary failover because of network slow or other issue, I changed the timeout setting as
ALTER DATABASE <Database Name>
SET PARTNER TIMEOUT 120
Which I understand if connection is broken between principal and mirror, principal database will wait for 120 second and after that only automatic failover will happen.
If this is true, it does not happen in my case. Failover happens before120 second.
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Jun 18, 2014
I was told that if I wanted to setup mirroring between multiple instance on the same server that each endpoint had to be different number. Is that true? Or can I use the default 5022 for each instance?
Ex.
Server1Instance1
Use endpoint 5022
Server1Instance2
Use endpoint 5022
VS
Server1Instance1
Use endpoint 5022
Server1Instance2
Use endpoint 5023
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Nov 22, 2014
I have multiple SQL 2008 severs with databases. Also, 1 mirroring server in place.
Since my database count is increasing can i have only 1 mirroring server. Is there any limit of db at mirroring server. I would have approx. 150 databases.
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Feb 4, 2015
We currently use Zabbix to monitor our SQL Servers, generally we use Perf_Counters to gather performance information (CPU Usage, Memory, Blocked process etc.), Zabbix also lets us monitor services as to whether they are up or down. I have searched google looking for any information regarding the monitoring of AlwaysOn/Mirroring within Zabbix and to date ave found nothing. What I am looking to alert on is an indication that Mirroring has stopped/ been interrupted with say something like "Not Synchronized"... Zabbix and monitoring SQL Server 2012 and specifically monitoring AlwaysOn...
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May 4, 2015
I have created mirroring... one of the column is encrypted on mirror database and I can see the decrypted result when I do query when I actually logged into server (through remote connection) but when I use the same query through using SSMS from my laptop the query result come as the column is not decrypted,
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Jul 16, 2015
I have created a Endpoint with "Mirroring Server" on the mirroring instance. Due to the keyword server i am not able to drop the endpoint now.
Also am not able to configure a mirror in a windows workgroup also( the two systems principal and mirror are under same network ). I have followed many ways as per msdn articles and other blogs.
I am not able to connect to the mirror server.Â
I have tried giving the ip addr and the port no, also the computer name:port no, computername.local:port no etc. Both the systems are running on sql server 2008 only
I always get the error as Connection cannot be established to the destination.
(I have also enabled the ports in firewall by creating inbound and outbound rules)
The issue probably lies in NAMING server address i guess.
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Jan 4, 2008
Hi everybody,
I have a mirroring set up for around 30 databases in a 64 bit - 2 powerfull servers scenario - wih latest sp2 + hotfix. Mirroring works perfectly most of the times but when the principal is getting busy during the busy period of the day all of a sudden the processor on the mirror jumps to 100% and stays there for a long time - there are no live databases on the mirror server - all the databases are in mirrored mode. The principal server processor is less than 5% all the time. The network load between the principal and the mirror is also in normal limits. The principal server is dedicated to SQL but the mirror has other things too but the other processes use up maximum 15-20% of the CPU and when I stop SQL Server in one of those moments when the CPU jumps to 100% everything comes back to normal so it's clear that the issue is SQL on the mirror.
Any ideas would be greatly appreciated.
Thanks,
Stefan
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