I am using SQl Server 2012 Database Mirroring with around 40 gb as mdf and 1 gb as ldf. Now my ldf size increased . How to reduce ldf size while mirror enabled with mirror server and witness server. Can shrink the ldf with mirror enables.
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After adding the Witness Server to the Mirror session, the Witness Connection state between the Mirror and Witness Connection is Disconnected and the state between Principal and Witness Connection is Connected.
The procedures defined in Books Online was used to setup Database Mirroring...when the Witness server was added to the Mirror session, only the alter database T-SQL statement was executed on the Principal server.
ALTER DATABASE <db_name> SET WITNESS = 'TCP://<servername>:<port>'
After executing the above statement, a few seconds later the state between Principal and Witness Connection changed to Connected and the state between Mirror and Witness Connection remains Disconnected.
The Mirror session is not using Certificates, every server is on the same domain, using the same domain login account, and all servers have SP2 installed running Enterprise Edition.
Any idea's why the state between Mirror and Witness Connection remains Disconnected?
Thanks,
missing witness server information and the fail-over is broken suddenly? 4:00am no maintenance job. I have one sql job on 10pm for backup on database transaction log only.
I can see the primary have problem then perform fail-over to mirror database, the auto fail-over was broken.
I re-build the sql mirror is OK , but i want to find the root cause.
Windows application event was full when there have many failed event, i have increase log size for application event.
Hi guys , I would like to know what's the exactly results able to get in this following scenario.
Server A : Principal
Server M : Mirror
Server W : Witness
1) Firstly, disable server M, following by server W. So probably i will unable to connect to Server A eventhough it acts as a principal.
2) Next, if I enable either server M or server W , what will I able to get actually ? Is it the mirroring works like the article which written in Microsoft page ?(http://www.microsoft.com/technet/prodtechnol/sql/2005/dbmirror.mspx#ETPAE)
At here, I get an error message and unable to continue the mirroring section. ( "Database EMS is enabled for Database Mirroring, but neither the partner nor witness server instances are available: the database cannot be opened." or "Database 'EMS' is being recovered. Waiting until recovery is finished." )
3) If I enable both server M and server W, the mirroring continue to work again.
Can I have any assistance on (2) issue? Thx for the assistance.
Best Regards,
Hans
We have a SQL server 2012 database with size 200mb and Transaction Log has gone up to 34GB.
We have SQL server Mirror is enabled and principal database is running with Full Recovery Model.
How can I truncate/Shrink Log files? Will it impact on existing mirroring setup? I am very much new to SQL server.
Hello,
the Mirror Server is not connected to the Witness Server.
Mirror Server and Wtiness Server are instances on one server.
I get this error:
"
2007-06-28 17:08:12.77 spid23s The server instance Witness rejected configure request; read its error log file for more information. The reason 1451, and state 3, can be of use for diagnostics by Microsoft. This is a transient error hence retrying the request is likely to succeed. Correct the cause if any and retry."
In the SQL Profiler for the Witness Server I get "An error occurred while receiving data" Error 64.
In the witness server logs is nothing depending on this.
The connection between the witness and principal and the mirror and principal are all right. I have created User logins with certificates on the same way on all instances.
What can I do?
Greets
I can establish the mirror with the principal and mirror but cannot add the witness (error 1456) all machines are SQL Server 2005 standard edition service pack 2 principal and mirror are windows server 2003 and witness is windows xp
View 20 Replies View RelatedI 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.
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.
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.
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
Hi!
I have setup a database mirroring session without witness - ServerA is the principal, ServerB is the mirror,. Each SQL Server instance is hosted on its own machine on sql2005 EE SP2. The mirroring is working correctly. If I submit to server ServerA command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER
, ServerB becomes the principal, it means that mirroring works correctly.
My issue is with the SQL Native Client and a front-end ASP application (actually IIS 6.0 site) that needs to make use of this database. I have setup my front-end application to use SQL Native Client and specified the failover server in connection string. Here is the connection string that I am using :
PROVIDER=SQLNCLI.1;Server=ServerA,1433;Failover Partner=ServerB,1433;Database=MYDBNAME;Network=dbmssocn;Integrated Security=SSPI;
Everything works perfectly on my front-end application when ServerA is the principal. If I execute on server ServerA command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER
, ServerB becomes the principal, and the failover occurs correctly on the database side. The problem is that my front-end application is not able to query the database on ServerB. The error appears:
Microsoft SQL Native Client error '80004005'
Cannot open database "MYDBNAME" requested by the login. The login failed.
This behavior my appication till I unload IIS 6.0 pool application. After that my front-end application becomes work correctly with ServerB.
When I swap server, I execute on server ServerB command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER,
my IIS 6.0 application automaticly turn back to ServerA without any action on my side.
I am using SQL Native Client last version http://download.microsoft.com/download/2/7/c/27c60d49-6dbe-423e-9a9e-1c873f269484/sqlncli.msi (issued in February 2007). Has anyone experienced this issue? I'm thinking that it's a problem in the SQL Native client
I have two questions here.
Question 1:
If I am using Database Mirroring for my production database in SQL Serever 2005, can I do mirroring on the mirror database?
Principal Database -- Mirror -- Mirror A -- Mirror -- Mirror B
Can this be done?
Question 2:
Can I do 2 mirroring on a single principal database? If can, which mirror database it will goes when the failed over happen? can the other mirror switch to mirror the failed over database?
Principal Database -- Mirror -- Mirror A
-- Mirror -- Mirror B
Please advise. Thanks
I have three win2k8 r2 servers. 2 are running SQL 2008 r2 and are mirrored. The 3rd server is a witness server. Every so often we get errors and failovers of the mirror. The communication errors are between the witness server and sql servers. No errors between SQL servers. There seem to be no network issues and happen randomly.
Event id 1474 and 1479.
The mirroring connection to "TCP://witnesssrv:5022" has timed out for database "DB" after 30 seconds without a response. Check the service and network connections.
Database mirroring connection error 4 'An error occurred while receiving data: '64(The specified network name is no longer available.)'.' for 'TCP://witnesssrv:5022'.
Hi, all.
here is the situation.
we designated one server as a mirrored server. this server will host all mirrored databases from different principles in different server using certificate.
1) Server A (Principle) Server B(Mirrored)
2) Server C (Principle) Server B(Mirrored)
I was able to set up mirroring between A and B. But unable to set up mirroring between C and B.
My question is "Can I grant connect on endpoint to two different host logins?"
For example, on the server B
I created two different logins for Server A and C in order to assign different certificates to two principle servers.
For Server A.
create login server_A_login with password = 'djkkajnxks';
go
create user server_A_user for login server_A_login
go
create certificate server_A_cert
authorization Server_A_user
from file = 'c:certificateserver_a_cert.cer'
go
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [server_a_login];
GO
For Server C.
create login server_C_login with password = 'djkkajnxks';
go
create user server_C_user for login server_c_login
go
create certificate server_c_cert
authorization Server_c_user
from file = 'c:certificateserver_c_cert.cer'
go
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [server_c_login];
GO
when I set up like this and try to start mirroring, I am getting error from server c saying, "the network tcp:serverb.corp.com can not be reached or does not exist"
But mirroring between server a and b is OK. I set up them first, then between c and b.
any ideas?
thanks,
Hi,
I've a very basic doubt about database mirroring. I did setup a database mirroring session with the help of SQL Server Management Studio between the server A (db1) and B(db1). When is stop database mirroring by using the command button "Stop Mirroring" available in the mirroring page of SQL Server Management Studio , the mirror database{ B(db1) } goes to state "Restoring...". After stopping the mirroring i'm not able to access the mirror database.
Can you please tell me how to bring mirror database B(db1) to operation mode so that we can start working with that database?
Regards,
Gopi
I have configured active passive cluster in production environment. And we also have a dr which we have configured with asynchronous mirroring with no witness. Currently active node(node
a) is in sync with dr. When failover happens and the second node(node
b) becomes active, the mirror is broken and goes to disconnected mode.
But when we failback again to node a mirror is connected again and is in sync again. In our setup we have active passive cluster and a standalone server as dr.
When I try to setup mirror on a SQLserver dbase using windows Authenticated login I get error:-
Login failed for user 'SERVERBAdministrator'. (Microsoft SQL Server , Error: 4060).The login connect string however on selection of SERVERB from SERVERA has a greyed out option for using Windows Authenticated login which clearly shows Username: SERVERAAdministrator.It is odd that the error coming back is showing SERVERBAdministrator on the rejection. (somehow the machines got swapped over in the authentication) The strange thing is if you use the SQLserver studio on SERVERA to connect to SERVERB using the object browser and Windows authenticated login it all works fine without errors. clearly the Mirror software is using some other means/privs of login to establish the connection.
The two machines SERVERA and SERVERB are in the same Domain (DOM1) but they are not using a domain user account.They are using Administrator user on both independent machines. The SQLSERVER install specified both Windows and sqlserver logins. The mirror is to use Windows authenticated login.Is there some login priv we are missing The sqlserver security has allowed this type of login......
DB replication can set db recovery model to simple ,why db mirror can not db recovery model to simple.
DB mirror must be set to full recovery model.
As far as I know, whatever db mirror and db replication ,there is a log reader to read the log in the ldf file DB mirror and DB replication are almost the same principle to replicate the db to another db server.
I was trying to test mirroring and now would like to delete the mirror database but it says I need to remove database mirroring first. I deleted the endpoint and cannot figure out how to remove the mirroring. Can someone please help.
View 1 Replies View RelatedTo configure database mirroring
After connecting to the principal server instance, in Object Explorer, click the server name to expand the server tree.
Expand Databases, and select the database to be mirrored.
Right-click the database, select Tasks, and then click Mirror. This opens the Mirroring page of the Database Properties dialog box.
To begin configuring mirroring, click the Configure Security button to launch the Configure Database Mirroring Security Wizard.
but i do not see any "Mirror" Option in the "Tasks" menu.
Why ?
I want my database to be mirrored . is it possible to mirror it on the same machine.
I have tried to create a named instance but while trying to configure its not visible.?
Am using SQL SERVER 2008
I have a 2 node cluster having 4 cores each wherein having 3 instances of SQL 2008 R2 enterprise comprising of 60 databases, 20 on each instance. I need to setup mirroring for each of the databases to a secondary server having 4 cores and 3 instances.
What i understand is that in this case the mirror server will be providing max of 512 worker threads and the 60 mirror databases would consume 240 threads.
What all needs to be checked for looking into the feasibility of going ahead with a async mirror setup as mentioned above.
When Create Mirror Database Server, Where need to store the Transaction Log backup file?I took FULL Backup of my Primary Database, and I restored at my Mirror Server also. When I try to create a Mirror Database."The remote copy of database "<db_name>" has not been rolled forward to a point in time that is encompassed in the local copy of the database log. (Microsoft SQL Server, Error:1412)".I am misplacing the Transaction Log backup file. Where I need to store that file?
View 10 Replies View RelatedHello everybody,
I'am currently testing a MSSQL 2005 mirroring implementation with automatically failover.
1 principal server ====> Server A
1 mirror server ====> Server B
1 witness server ====> Server C
When server A fails Server B becomes Principal. ( which is the general idea ) This is working perfectly.
The problem is when i try to connect to the mirror Server B ( actually the new principal )
I use the .NET connection string with the failover parameter ( even without the parameter ) the connection fails.
( the general error : unable to connect, or connection property has not been initialized )
Data Source=ServerA; Failover Partner=ServerB;Initial Catalog=DBMTest;uid=dbuser;pwd=dbpassword;
This connection property works fine when server A (original principal) is online.
When i run the SQL profiler with the mirror db as profile, i dont see the traffic.
So you think the mirror server has a network problem or was not connfigured for remote access.
i thought that also, but when i create a 'stand alone - non mirrored' database the same application with the same connetion string ( well.....different db) works fine.
The problem must be in the whole mirroring implementation....... ( my idea )
Does anyone had the same problem, or better, doed anyone know how to solve it?
Hope to hear from you soon!
Thank you in advance!
Regards,
W.schmitt
The netherlands
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?
Can 1 witness server work for 4 Principal and mirror servers?
Needs expert advise.
Hi all,
I feel happy to post my first thread at dbforums.com, and I think it's the community of DB professionals.
my question is:
I have two servers in my organization, one of them is running an SQL server database. Is there any way to make the second server a mirror of the first one and to make it runs automatically as the main server when the first server is down?
Thanks for replying soon.
Haytham
I need to start mirroring the databases without witness server.
View 3 Replies View RelatedI 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'.
View 5 Replies View RelatedI have an access database, I am new to the SQL SERVER scene. How do I mirror the database I have in Access with out it being interrupted from its functions?
--David
Hi folks. I'm trying to clear up some licensing confusion I"ve come across. First, if I use MIRROR on SS SE I am limited to a single REDO thread and Sycn mode. I see that on the Web. Will the singel REDO thread hurt the ability for the Secondary to keep up? Any one done any tests?
My confusion comes from a document that came across my desk a long time ago that showed that if you use MIRROR on SQL Server SE you are limited to 4 processors for the entire cluster. So if you wanted a balanced failover you would have to have two 2-ways in essence. Is this true? Is it not longer true? I can't seem to find any mention of this....did someone give me bad advice? Help! Thanks.
If your principal fails and your mirror assumes the main role and it is in Full recovery mode (which it has to be in Standard edition), then the log files will grow and grow until a transaction backup and shrink is executed.
I have maintenance plans running daily (and hourly for transaction log backup/shrink) on my principal, but nothing on my mirror.
Do I need to set up the same maintenance plans on my mirror server???
Thanks
Ed
Hi,
I have SQL 2005 database mirrror enviroment with MS jdbc driver 1.1. From code, I need to get server name that current connection connect to at run time (which server that the current connection connect to: Priciple server or mirror server). Any help for that?
Thanks a lot!
Li