Hi all,
With C# or VC++ we can use ADO.NET that support the system work smothly when failover occur. I would like to handle failover in t-sql enviroment and it seam to be hard for me when swiching ":connect <servername> code
Do you have any idea to handle it with T-SQL. I need to make a demo on it. Please help!
I am running SQL 2014 2-node AlwaysON Availability groups, Enterprise Edition in our environment and 5 databases are part of AG.
Question is, sometimes AG is getting failed over to node2 but always our preferred node is node1 due to some business needs otherwise some of our jobs will fail.
So, what I looking for is, a sql script which can handle a situation wherein, for some reason, AG is failed over to node2, it should be able to detect if node1 is back online or not and if so, it should fail back to node1. How to do this using tsql query or stored proc or sql agent job ?
1. Once fail over to secondary replica, what will happen to connected session in primary node? can the session fail over to secondary seamlessly or need to re-login. what happen committed transactions which has not write to disk.
2. Assume I have always on cluster with three nodes, if primary fails, how second node make write/ read mode.
3. after fail over done to 2nd secondary node what mode in production(readonly or read write).
4. how to rollback to production primary ,will change data in secondary will get updated in primary.
We have set up Mirroring with a witness server and everything works fine when we failover from the SQL Management console.
However, if we failover when our Maccola client is connected, the client blows up - clearly because it can no longer connect to the database.
The ODBC DSN used by the Maccola client shows a checkbox for the 'select a failover server' but the checkbox is grayed out.
Also the summary of settings for the DSN at the end of the wizard reveals that the failover to server (y/N) option is set to N.
The default setting for this DSN is 'populate the remaining values by querying the server' but it doesn't appear to be getting the settings for failover from the server or any other interactive DSN settings either. The server is clearly set for mirroring.
Another suspicious item is that the DSN cannot connect to the server with SA permissions, even though the server is set to mixed security and we use the correct authentication.
Is it possible that the client MACHINE is not authenticating with the domain or sql server properly. We are logged into the client with the domain account that is the SQL admin account on the sql server box.
We should be able to interact with the sql server settings through the ODBC DSN on the client shoulnd't we?
Are we missing a service pack on the client?
Thanks,
Kimball
1. In alwaysON fail over cluster, Once fail over to secondary replica, what will happen to connected session in primary node? can the session fail over to secondary seamlessly or need to re-login. what happen committed transactions which has not write to disk.
2. Assume I have always on cluster with three nodes, if primary fails, how second node make write/ read mode.
3. After fail over done to 2nd secondary node what mode in production(readonly or read write).
4. How to rollback to production primary ,will change data in secondary will get updated in primary.
Hi I am a newbie to SQL.I have a historical list of digatal points listed by time.ie: 3 fieldsPointName;Date/Time;State.I need to return a list of When a specific point chsnges state.For example a list everytime Point A transitions to State 1.Any help is appreciated.--Posted via http://dbforums.com
View 1 Replies View RelatedHello all. I have a table with two coulmns CODE and DESCRITPION. Can anyone suggest how i can go about deleteing the entire record where two or more codes are the same?
Thanks.
Hi,
I was hoping a sharp eye may be able to pick up on what I am doing wrong here, I am i must be making a comon mistake. If necessary I am happy to create and post a sample if necessary.
Problem:
The publication parent table has a filter (defined below) and also has a join filter(defined below) to a child table. When changes are made to the parent and child table and synchronised a conflict is raised. For the child table for some reason the merge agent is saying an explicit update occured at the publisher but the values at the publisher have not changed at all and no sql has been executed to update the publisher rows. This in effect is stopping the changes to the child table being applied until i manually apply them in the conflict resolver. The strange thing is the conflict should not occur in the first place.
Perhaps my SQL server 2005 version? 9.00.2050.00 SP1 Standard Edition
Environment:
SQL Server 2005 - 9.00.2050.00 SP1 Standard Edition
SQL Server Mobile
Detail:
FKs are
FK: Job.JobScheduleID --> JobSchedule.ID
FK: JobDetail.JobID --> Job.ID
All three tables have int based IDs that are auto increment.
Publication Articles:
JobSchedule is download only
Job is Bidirectional, identity range management is MANUAL (only updates occur on this table)
JobDetail is Bidirectional, identity range management is MANUAL (only updates occur on this table)
Filters are of the following form:
Filter Job:
SELECT <published_columns> FROM [dbo].[Job] WHERE convert(nchar,[companyID])=Host_Name() AND [JobCompletedDate] IS NULL AND
( [JobScheduleID] in (SELECT distinct ID from JobSchedule where GETDATE() BETWEEN [JobSchedule].[start] AND [JobSchedule].[end]) )
Join Filter Job --> JobDetail
SELECT <published_columns> FROM [dbo].[Job] INNER JOIN [dbo].[JobDetail] ON [Job].[ID] = [JobDetail].[JobID]
Now the first thing to note with respect to using GetDate() i have read http://msdn2.microsoft.com/en-us/library/ms365153.aspx so i thought that i would remove that portion of the Filter on the Job table just to see what happens.
SELECT <published_columns> FROM [dbo].[Job] WHERE convert(nchar,[companyID])=Host_Name() AND [JobCompletedDate] IS NULL
This still did not resolve the issue. I then Remove the AND [JobCompletedDate] IS NULL and it then started working fine (cool) but of course no longer satisfys the rule i want to create (seriously uncool ).
Any ideas out there ?
Much appreciated,
pdns
Hi,
I'm trying to export sql table as fixed length text file with format file but I got the following error message:
Error = [Microsoft][ODBC SQL Server Driver][SQL Server]
Warning: Server data (61 bytes) exceeds host-file field length (60 bytes) for field (4).
Use prefix length, termination string, or a larger host-file field size.
Truncation cannot occur for BCP output file
All fields in the SQL input table have char data type and I use the format file like this:
7.0
29
1 SQLCHAR 0 10 "" 1 SEQ
2 SQLCHAR 0 1 "" 2 NPARSED
3 SQLCHAR 0 115 "" 3 COMPANY
4 SQLCHAR 0 60 "" 4 ADDR1
....
27 SQLCHAR 0 1 "" 27 LACS
28 SQLCHAR 0 2 "" 28 DPV
29 SQLCHAR 0 2 "
" 29 ZIP4CODE
I've been researched about this error but I couldn't find the clear answer.
The strange thing is that all the records are char() fields, not varchar()
And I checked the max length record for the 4th column(ADDR1) and it was 60, not 61.
However I'm still getting the error.
The output file was exported but some of the records have short length.
Is this some kind of bcp bug?
I used SQL Server 2000 Standard w/ SP4
And the following is the command that I used:
declare @cmd varchar(2000)
SET @cmd = 'bcp "Input_table" out "D:AddressUpdateTmpxFixADDR.dat" -fD:AddressUpdateTmpxFixADDR.fmt -Usa -Psapass -SMyMachine''
print(@cmd)
EXEC master..xp_cmdshell @cmd
Please let me know if anyone solve the similar problem.
Thanks,
- Hyung -
Hi,
I am using following code to fill my dataset. when multiple user connect to the web-site it will give me following error:
Error Message: Transaction (Process ID 98) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
I am using stored procedure to select records from database.
DataSet ds = new DataSet();SqlConnection mc = OpenSqlConnection();
try
{SqlCommand cmd = new SqlCommand(strCmd, mc);cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandTimeout = 0;if (parameters != null)
{foreach (KeyValuePair<string, object> p in parameters)
{
cmd.Parameters.AddWithValue(p.Key, p.Value);
}
}SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
}catch (Exception ex)
{
}
finally
{
mc.Close();
}
return ds;
Appreciate your help,
prashant
I had write a ActiveX service to delete several tables and those records are more than 100000. When I test it by deleted 1000 records it is ok, but once the volum is increase until 100000, it will give me a error message said timeout operation fail.
how can i overcome this problem. please!!!!
We get this error when we add IP addresses to the Windows system when SQL 2005
database activity is on-going:
Database error: A transport-level error has occurred when receiving results
from the server. (provider: TCP Provider, error: 0 - The semaphore timeout
period has expired.)
.NET application can be running for weeks without error, but after adding a
new IP address, application gets 5-16 'transport-level errors' before
correcting itself.
Error occurs on Windows XP computer in our case. SQL Server, running on Windows server 2003, doesn't seem to pick up on the newly added IP address.
Hi, I work in a hosting company and one of the customer's has the following error listed in the event viewer, they have asked us to look into the problem as the web server is showing the error and they suspect it is a connection problem to the database. From a windows OS point of view I cannot find anything that could be causing this. Could someone confirm that this looks like and app/coding issue rather than an OS issue?? System.Data.SqlClient.SqlException: Timeout expired. The timeout periodelapsed prior to completion of the operation or the server is notresponding.--------------------------------------------------------------------DEBUG INFOUnable to connect to SQL Server session database. Timeout expired. The timeout period elapsed prior to completion ofthe operation or the server is not responding.--------------------------------------------------------------------BASE EXCEPTION TOSTRINGSystem.Data.SqlClient.SqlException: Timeout expired. The timeout periodelapsed prior to completion of the operation or the server is notresponding. at System.Data.SqlClient.SqlConnection.OnError(SqlExceptionexception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlExceptionexception, Boolean breakConnection) atSystem.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior,SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSetbulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReaderds, RunBehavior runBehavior, String resetOptionsString) atSystem.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Booleanasync) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Stringmethod, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Stringmethod) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehaviorbehavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader() at System.Web.SessionState.SqlSessionStateStore.DoGet(HttpContextcontext, String id, Boolean getExclusive, Boolean& locked, TimeSpan&lockAge, Object& lockId, SessionStateActions& actionFlags)--------------------------------------------------------------------STACKTRACE at System.Data.SqlClient.SqlConnection.OnError(SqlExceptionexception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlExceptionexception, Boolean breakConnection) atSystem.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior,SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSetbulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReaderds, RunBehavior runBehavior, String resetOptionsString) atSystem.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Booleanasync) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Stringmethod, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehaviorcmdBehavior, RunBehavior runBehavior, Boolean returnStream, Stringmethod) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehaviorbehavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader() at System.Web.SessionState.SqlSessionStateStore.DoGet(HttpContextcontext, String id, Boolean getExclusive, Boolean& locked, TimeSpan&lockAge, Object& lockId, SessionStateActions& actionFlags)
View 1 Replies View Related
Hai friends,
I was created report with 9 sub reports , with multiple column driildown for based on client requirement, iam displying the correct data and in database server data is availabel between 11/01/2007 to 11/30/2007, iam applying the input parameters are begin date, end date, region(defaultly ALL), Department(defaulty ALL), site(defaulty ALL).
my problem is while selecting the default dates (minum and maximum dateranges) with selecting ALL regions, ALL departments, ALL sites iam not getting the output. it showing error like
" An error occur on local report processing, an internal error occur on report server, see error log for more details"
but iam selecting the date as 11/01/2007 to 11/02/2007( that is not large records, between two dates only) it shows correct output.
while applying the default ranges that is 11/01/2007 to 11/30/2007 report shows above mentioned error.
problem with 9 sub reports ? or any thying
please help me how to solve my problem next coming two days i have to deploy my report to client, at the time it will show data between default date ranges.
Help me thanks in advance
JACKS V
'****************************************************************************
Cmd.CommandText = "Drop Table Raj"
Cmd.ExecuteNonQuery()
Cmd.CommandText = "Select * Into Raj From XXX"
Cmd.ExecuteNonQuery()
'**************************************************************************
This generates error that Table already exist.
If Wait 1 sec then execute statement then it works fine.
Thanks in Advance
Piyush Verma
1) We are writing a custome Source component for Oracle with OCI calls, Could some one please let me know how to Enable Error Handling for the Same,
2) Is it possible to write Custome Error Handeling Component for SSIS? if yes could you please help me on how to write it.
Thanks in advance.
I have to figure out a way to handle a failover in SQL Server 2005. I was reading a few articles about it.
1. Do I need to do anything in application layer to let a failover occur in SQL Server 2005
2. I have a web site that connects to a production server, the connection string is defined in web.config. If I implement Mirroring in SQL Server 2005, and when failover occurs, shouldn’t I change the connection string to point the application to the new server?
Hi I just set up a new cluster and everything was working. Now when I try to test failovers like unplug the public network card etc...
The cluster group fails over correctly but my data and log array's dont failover.
So I unplug the network cable from node 1 (active) the cluster group with the IP, name, and Quorum disk fails over to node 2 but the other groups sql data and sql log stay on node1 and dont failover.
Any ideas?
TIA
I have 4 servers, the first two are web app and load balanced the second two are to be configured for failover. Let us call them SvrA and SvrB. SvrA will have active SQL (2000EE) and passive Content (large directory of courses offered) SvrB will have passive SQL(2000EE) and active Content. Both SvrA and SvrB will be connected to a redundant SCSI 18 drive Drive bay (cheap SAN) which will be configured with a) mirrored OS drives, b) a RAID 5 partition for SQL and c) a RAID 5 partition for the content folders.
SvrA & SvrB will be quad processor machines. EE license for 4 processors as 2nd svr is failover for SQL.
My concern is the failover set up for the content portion, or is it the failure of the server that causes the failover? This is quite confusing to me.
Any thoughts would be most helpful.
Hi there,
I am testing the db mirroring, making sure it will auto failover. I've stopped the SQL services on my principal and then I looked at the mirror db is says it's restoring. It stayed like that for 10 min before I enabled the mirroring again. Anyone knows why it's not failing over??????
Here's my setup: SQL 2005 Standard, Server 1 Principal, Server 2 Mirror & Witness.
Hi all:
I was wondering what will happend to the transaction when the cluster failover from one node to another?
In my case the database is in node-001 and I need to restart the server on node-001. So I need to have the database failover to node-002, so I can work on node-001. During this process, will it effect to end-user?
Thanks
vua
Is it possible to failover a single or a selected number of databasesonto a standby server? We're currently log shipping about 12 databasesto a standby and I was wondering if it was possible to randomlyfailover onto selected dbs.My understanding of log shipping is that when the primary server goesdown, the standby takes over. But, does that mean that all of the db'son the standby server now become the primary? Or, can failover occur onselected dbs?The reason I ask is because if one db on the primary, for example, wasto go down, I'd like to be able to bring the particular db on thestandby server online while I fix or restore what's on the primaryserver. Can it be done individually or is it an all or nothingscenario?Your personal advice or links is greatly appreciated.Thanks,Peps
View 1 Replies View RelatedI have a 2 node Microsoft 2000 cluster with a shared storage device. Iwant to create automatic failover for MS SQL 2000 server. I can dothat wit the following options:1. Active/Pasive (one instance installed)2. Active/Active (More then one instance/virtual sql serversinstalled)I have a question about option 2.Is it possible to have more then one instance/virtual SQL server,service only one database for example loadbalancing. ?, or when youcreate multiple instances/virtual SQL servers, does that mean you havemultiple databases ? If not why does a Virtual SQL server has to betaken over by a cluster node that didnt fail. Then you can actuallyuse option 1. Please advise!The documentation is not very clear on this issues.Regards,Nico de Groot
View 1 Replies View RelatedCould not able to connect secondary replica below is the error message I am getting when I tried to failover. Cannot connect to VLDBATEAM.
The secondary replica that you selected to become the new primary replica does not belong to the specified availability group. A possible explanation is that the replica has not been joined the availability group. Â (Microsoft.SqlServer.Management.HadrTasks)
Hi there!
I use different udls for a website which is partly asp pages and partly aspx pages.
Every database is mirrored, so each udl indicates a "failover partner". However we decided recently that one of the database would not be mirrored anymore. For this database we still use in the udl a "failover partner" to redirect the connection to the second database in case of a failover. For the asp pages the failover works fine even if the database is not mirrored, but it doesn't work for the aspx pages.
It would be great if anyone had an idea why the behaviour is not the same for the aspx pages, and if we can still use a "failover partner" in udls even if the database is not mirrored.. if not, what should we use to connect to another database?
Any help is welcome!
idel
How do I test failover to point to the mirrored database instead of the principal without having to stop the primary instance? I would like to just bring the mirrored database on the primary instance to an offline status and see that the same database on the mirrored instance getting activated as the primary. This does not happen if I try to put the database on the primary server "offline" as it complains that any database that is being mirrored cannot be taken offline.
View 1 Replies View RelatedOur reports are connecting to a database snapshot for their data. Periodically this snapshot loads, which means for a minute or two the reports go down. There is however another snapshot available, and between the two one will always be up. Is there a way with Reporting Services to dynamically switch between the two, depending on which one is up? These snapshots are on a constant schedule, so it would also acceptible (but not as nice), to have the database connection automatically switch at certain times of the day.
These snapshots are on the same server, or I would try using a failover partner in the connection string. To the best of my knowledge, this only switches servers, not the database instances.
We're planning on moving some applications to a SQL server. We're likely going to go with 64-bit for obvious reasons. Since these are critical apps, we plan on having a failover cluster set up. We're aware that all nodes in the cluster have to be 64-bit, if that's the way we decide to go.
The question is this: is there any "non-standard" way to have a 32-bit failover solution, perhaps via a 3rd party application? The only reason we're considering this is from a budget standpoint.
"Hurricane" Andrew
Milford, DE
Hi,
I have successfully set-up a DB mirroring. When the pricipal goes down, the mirror picksup and the other way around too. So the mirroring part is working great. However, when I use my web applicaiton (dot net 2.0), it is not able to connect to Mirror server. I get the following error:
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
My connection string in web app:
"Server=serverAAA;Failover Partner=serverBBB;Database=TestDB;User Id=testUser;Password=testPassword;"
I have checked the surface are config on "serverBBB" and it is set to use tcpip only for remote connections.
Any suggestions are higly appreciated. TIA.
I have to figure out a way to handle a failover in SQL Server 2005. I was reading a few articles about it.
1. Do I need to do anything in application layer to let a failover occur in SQL Server 2005
2. I have a web site that connects to a production server, the connection string is defined in web.config. If I implement Mirroring in SQL Server 2005, and when failover occurs, shouldn€™t I change the connection string to point the application to the new server?
Hi there,
We've recently set up a Principle, Mirror and Witness configuration with the Mirror and Witness in a separate building to the Principle. All three are part of the same domain (DMZ) and are different servers, the buildings are connected via a fiber optic cable. All servers and SQL Server instances are logged in with the same domain admin account DMZesAdmin.
Mirroring is all set-up and the databases are synchronized. Every once in a while some (not all, normally 6 out of 15) databases will switch roles and become active on the mirror. The SQL Server mirroring monitor job then reports:
Date 25/01/2007 12:37:01
Log Job History (Database Mirroring Monitor Job)
Step ID 1
Server DMZSQL01
Job Name Database Mirroring Monitor Job
Step Name
Duration 00:00:02
Sql Severity 16
Sql Message ID 32038
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0
Message
Executed as user: DMZesadmin. An internal error has occurred in the database mirroring monitor. [SQLSTATE 42000] (Error 32038). The step failed.
I have no idea, what causes the failover, it could be a slow network or a bad set-up, can anyone give me some ideas of what to do to track down the problem or any experience of what could be causing this, it happens randomly every day or three. No warning and if I go to the mirror and failover back to the principle again then it's all just fine. However I don't want half my databases working on 1 server and half on the other.
Any ideas?
Thanks
Ed
UPDATE:
I've just been looking at the logs on my Mirror and at the same time it reports in this order
Error: 1479, Severity: 16, State: 1.
The mirroring connection to "TCP://DMZSQL01.dmz.local:5022" has timed out for database "WARCMedia" after 10 seconds without a response. Check the service and network connections.
Database mirroring is inactive for database 'WARCMedia'. This is an informational message only. No user action is required.
Recovery is writing a checkpoint in database 'WARCMedia' (41). This is an informational message only. No user action is required.
The mirrored database "WARCMedia" is changing roles from "PRINCIPAL" to "MIRROR" due to Failover.
Database mirroring is inactive for database 'WARCMedia'. This is an informational message only. No user action is required.
...
This looks like a time out, is there any way to set the TimeOut threashold for Database mirroring or set retry intervals??
We need to start testing our Microsoft cluster servers.
Has anyone heard of any plan or products one can use to test
the failovers?
Please advise
Thanks
Susan
I need to know if there are any other failover options available for SQL Server/NT, beyond Microsoft Clustered Services. If there are any, which ones are advised?
Thanks,
Jon
jon_waldow@emeraldsolutions.com