Network Considerations For Mirroring
Apr 19, 2007
I would like to know people's thoughts on any special network considerations to take for mirroring and the logic behind them. Is it best to segregate mirroring traffic from other network traffic? Use a VLAN? Dedicate one NIC for mirroring and the other for general network traffic or just aggregate the two and let both types of traffic share the bandwidth?
I haven't seen much in this area from Microsoft's best practices and wanted to know what those who have implemented it have done and why. There are pros and cons for each method: Letting everything share one massive pipe with load balancing vs. trying to segregate traffic in some way so that general network connections etc. do not impact the mirroring capability.
I look forward to hearing from you.
-M-
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Jun 21, 2007
Hi all,
Can a publisher be mirrored? What are the implications, issues, gotchas? Transactional, Merge or Transactional w/ Updating Subscribers is what I'm considering.
Bottom line is I would like to use mirroring, but only one mirror will not suffice.
Thank you in advance.
Ray Nichols
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Oct 25, 2007
We have mirroring set up on SQL 2005(SP2) on windows server 2003 servers for 6 production servers to DR servers. It is high performance mode(asynchonous). We are using fully qualified server names with default 5022 port. Prod and DR are using same domain service account.
We had network outage for about 30 minutes last weekend and after that network was restored back to normal. Also few SQL 2000 servers have logshipping and it automatically started syncing up after network was restored. However mirroring didn't start automatically. Partners were in disconnected state and endpoints were stopped. For one database, log grew to 40 GB using most of the disk space.
Then we maually had to run
ALTER ENDPOINT Mirroring STATE = STARTED
and then it started syncing up.
Now the question is why it doesn't start syncing up automatically after network is back to normal and recognize the partner?
Is there anyway we can setup timeout or any parameter like that to specify how many times or how long partners try to connect with no luck and then give up?
Mintu
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Jun 10, 2015
We have a database in SQL Server 2008 R2 with mirroring and want that replication is done by dedicated network.We stop the endpoint and when we try to run the following command, syntax error occurred:
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '192.168.1.14'.
What is the correct syntax of the command line below?
ALTER ENDPOINT Endpoint_Mirroring AS TCP (LISTENER_IP = '192.168.1.14')
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Apr 19, 2007
I have a table with about 200 million rows of data. I add a couple million rows of data each week to the table in a single load process. The table is used for reporting purposes only and there are never (not intentionally at least) any updates or deletes to the table. The data is always being added to the "end" of the table with the new AsOfDate being the main factor in the clustered index.
My question is this: Since I'm not "inserting" rows that would split pages, should I have my FILLFACTOR for the table set to 100, or am I missing something? I obviously want to save physical hard drive space, but I also don't want to slow down the import process.
BTW, I'm using SQL2000
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Sep 14, 2007
We have about 150 SQL servers and basically we're considering the pros and cons of installing SSIS on a central SSIS server - that is responsible for all DTS jobs - as opposed to installing SSIS on the local SQL instance.
On the plus side so far:
1./ Central administration, alerting, change management etc
2./ Possible performance gain on the local instance not having SSIS installed?
On the negative side:
1./ Central point of failure
2./ Possibility that it would need to be a clustered...
3./ Compatibility issues may mean having to make the central SSIS server 32-bit?
4./ Possible performance cost of remote SSIS?
5./ With multiple DTS packages running at different times, when would we take the server down for maintenace...?
Would appreciate your thoughts.
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Nov 15, 2006
Hello, I'm developing application which monitors network packets. The monitoring data are saved into table. Monitoring table maintains the data for fixed quantum time,for example during one 1 hour. So, every minute before or after insert new data, I delete the time-expired data. I doubt that the endless delete operation would results in some problems(increasing index,etc..).
Is this mechanism safe to the dbms?
Aren't there round-robin(?) style table?
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Apr 12, 2006
I would like to know how to, if at all possible, to reconstruct the following trigger as to be able to handle multiple row insert when a single insert command is used - because the trigger will only be called once...I'm not familiar and don't know anything about cursors and i've read that its not the best way to go.
TRIGGER ON childtable INSTEAD OF INSERT
AS
BEGIN
DECLARE @customkey char(16);
DECLARE @nextchild int;
DECLARE @parent int;
DECLARE @date datetime;
SET @date = getdate();
SELECT @parent = parenttable FROM inserted;
SELECT @nextchild=count(*)+1 FROM childtable WHERE parenttable = @parent;
IF (@nextchild >= 9998) return;
SET @customkey = €˜type€™+ convert(char(4),year(@date)) + convert(char(2),month(@date)) + convert(char(2),day(@date))+convert(char(4),@nextchild + 1);
INSERT INTO childtable (customkey,parent) VALUES (@customkey,@parent);
END
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Oct 31, 2006
Can someone point me to a resource for Table Design Considerations for Merge Replication? I have an ASP.Net/SQL2K5 app that I need to run on disconnected machines, then allow dfor data sync through merge replication. I assume that the first step is getting my tables indexed in a replication friendlt manner?
Many Thanks to anyone who can point me in the right direction!
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Dec 10, 2007
I may be overthinking this, but I want to make sure this is right. If you have a processor license of SQL Server Standard running both Reporting Service databases and the IIS interface, isn't it true that the underlying licenses of other servers containing your data are irrelivent in the context of serving the reports over the web? Example. Server 1 has SSRS as described above, processor license of Standard. Server 2 has user license of SQL Enterprise and serves data to a couple of reports on Server 1. This does not violate a license, correct? Doesn't Server 1 just take one of the CALs from Server 2?
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Feb 13, 2008
in a prior "legacy" life we couldn't imagine 24x7 implementations because it was important to 1) reorganize databases periodically to remove fragmentation that adversely affected performance and 2) back up databases just in case.
In a 24x7 SQL Server 2005 implementation, high level only, how are these and other maintenance related things accomplished with confidence?
I dont think SQL cleanses its own page splits unsolicited. Are DBAs totally reliant on logs in full recovery installations where db must be up 24x7? What if the devices those logs sit on fail? What if the logs become too large? Is it likely that if you want 24x7 you're looking at Enterrise Edition only?
I'm totally aware of and confident in the sliding window partitioning thing but it seems to me there must be more out there in terms of periodic, more frequent maintenance activity.
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Apr 26, 2006
Can someone point me to some good articles or perhaps directly supply some words of wisdom with regard to wise utilization of variables within a T-SQL script from and standpoint of conserving memory usage and improved execution cost?
For example:
(1) Is it better to use varchars, nvarchars, etc. defined with minimal lengths to support the needs of the script or is it just as efficient to declare all with a length of say 4,000?
(2) I've seen behavior that leads me to believe that when passing a variable as a parameter in a nested procedure call, if the declared types of the parameter and the variable being passed in don't match (i.e. one is numeric(38,10) and the other is int), then implicit type conversions hurt performance. Is this true and how broadly does it apply?
(3) Does the number of variables declared in a script materially impact the performance and / or resource utlization?
(4) Is it more efficient to have a series of variable value assignments in a single SELECT statement versus a series of SET statements? Should I always perfer one to the other? Only within a looping construct?
Thanks,
Shadowraven
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Mar 1, 2006
Anyone know of a good "free" way to back up web files and SQL Server 2005 Express Database?
I was able to use Windows Server 2003 Backup utility to back up the folder where the Databases were stored, as well as the web files, with no errors.
But I have heard a lot of discussion that you can't just simply backup SQL Server data files?
I'm wondering how sound the backup I've created is...
Any suggestions?
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Dec 13, 2007
I need to copy all the data from all the tables in a database to a copy of this database on another server.
What feature of SSIS should I take advantage of to accomplish this?
We have an SLA for 8am, most times the data warehousing jobs complete at 8:05am. Adding an additional process/set of tasks to this package would obviously make matters so I'm trying to update/copy/replicate the data in the fastest manner. Typically we're talking 2 marts (10-20GB) with 2 large tables (5-10 mill records) and 20 marts (0.5 - 5 GB) with many more smaller tables (~40 tables with record count ranging from 1 to a million)
Additionally please indicate if the design/feature you suggest can handle (pushing schema changes and additions to the target server) schema changes or new tablesviews added to the source database.
My only idea so far...is using the import wizard (in Management Studio) to create an SSIS package (top copy all the tables from one server to another) and saving it to the server, Then executing this package after the job is complete. However this would not work if the schema of a table changed, or if a a table is added. Moreover I don't think I can edit this package in visual studio.
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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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Sep 30, 2004
Hello all,
We have a Windows 2003 Web Edition server serving a site through IIS. It connects to a Windows 2003 Standard Edition server running SQL 2000 SP3a.
This site receives the following error as seen in the topic:
[DBNETLIB][ConnectionRead (recv()).]General network error. Check your network documentation.
We've configured the server network utility to only allow TCP/IP connections. The connection string for the site is as follows:
<%
' FileName="Connection_ado_conn_string.htm"
' Type="ADO"
' HTTP="false"
' Catalog=""
' Schema=""
MM_connSpankMSSQL_STRING = "Provider=sqloledb;Data Source=SERVER_IP,1433;Network Library=DBMSSOCN;Initial Catalog=ourmaindb_1;User ID=ourmaindb_1;Password=hotcookies;"
%>
Any ideas or tips on solving this issue? We've noticed it is due to larger queries as smaller ones do work with no problems.
The servers are behind a BSD box running iptables, has 1433,1434 along with standard web ports wide open. Anything outbound is allowed.
Some further testing via ODBC on the IIS server improved things. No more connection pooling for the SQL Server driver allows for 1/3 of the query to run. Still 2/3s of it doesn't show up, and that general network error message appears.
Should have 330 rows if it works right.
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May 19, 2004
Hi
While running a DTS, many times the error message: "[DBNETLIB][ConnetionWrite (WrapperWrite()).]General network error. Check your network documentation." appears.
Does somebody knows why?
I am running the DTS from a computer (not the server where the DTS is stored) and it is connected without any problem when this happens.
Thanks!!
Regards
Lautaro - Argentina.
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Oct 4, 2007
Hi Every one,
I am using .Net 1.1 for my web application.
And my database server is SQL Server 2005.
My application is running fine, as i can login to it and also able to view pages. But when i open Order management(having 3K records) its give me error,
General Network Error. Check your network documentation
I have also searched many articles and tried following solutions but nothing working
- connectiontimeout = 0, max pool size = 7500/100, pooling = false
- SSL disabling enforce security false as mentioned in microsoft kb article.
And there's nothing any issue with hardware/firewall as my application's login and other forms are working fine(which use same database with same connection string)
Can any one please help me to solve this error?
With Regards,
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May 26, 2007
Hi We have a written a error log in Global.asax. which capture below mentioned error in the prodcution server. Same applications is working fine in some locations and some loactions we are getting the error.Any body knows why this error is occurs.Any body knows why this error is occurs. Error Message:General network error. Check your network documentation.Stack Trace: at System.Data.SqlClient.SqlInternalConnection.OpenAndLogin() at System.Data.SqlClient.SqlInternalConnection..ctor(SqlConnection connection, SqlConnectionString connectionOptions) at System.Data.SqlClient.SqlConnection.Open() at datalayer.sqldb.Execute(String ProcedureName, SqlParameter[] Parameters) at lms.User.GetUserDetails(String strUserid)ITs at LMS.Login.w_btn_Login_Click(Object sender, EventArgs e) at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
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Oct 4, 2007
Hi,I am using .Net 1.1 for my web application.And my database server is SQL Server 2005. My application is running fine, as i can login to it and also able to view pages. But when i open Order management(having 3K records) its give me error,General Network Error. Check your network documentation I have also searched many articles and tried following solutions but nothing working- connectiontimeout = 0, max pool size = 7500/100, pooling = false- SSL disabling enforce security false as mentioned in microsoft kb article. And there's nothing any issue with hardware/firewall as my application's login and other forms are working fine(which use same database with same connection string) Can any one please help me to solve this error?
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Feb 8, 2004
When I try to update the site setting, I get this Error and I don't know how to fix.
Server Error in '/DotNetNuke' Application.
--------------------------------------------------------------------------------
General network error. Check your network documentation.
Description: 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.Data.SqlClient.SqlException: General network error. Check your network documentation.
Source Error:
Line 281:
Line 282: myConnection.Open()
Line 283: myCommand.ExecuteNonQuery()
Line 284: myConnection.Close()
Line 285: End Sub
Source File: C:DotNetNukeComponentsAdminDB.vb Line: 283
Stack Trace:
[SqlException: General network error. Check your network documentation.]
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream) +721
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +196
DotNetNuke.AdminDB.UpdatePortalInfo(Int32 PortalId, String PortalName, String PortalAlias, String LogoFile, String FooterText, Int32 UserRegistration, Int32 BannerAdvertising, String Currency, Int32 AdministratorId, String ExpiryDate, Double HostFee, Double HostSpace, String PaymentProcessor, String ProcessorUserId, String ProcessorPassword, String Description, String KeyWords, String BackgroundFile, Int32 SiteLogHistory) in C:DotNetNukeComponentsAdminDB.vb:283
DotNetNuke.SiteSettings.Update_Click(Object sender, EventArgs e) in C:DotNetNukeadminPortalSiteSettings.ascx.vb:287
System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e)
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
System.Web.UI.Page.ProcessRequestMain()
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
Please Help!
Thank you,
dlouanis
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Jan 9, 2006
I use sqlclient to connect directly from my mobile 5 pocketpc to a sql server 2005 database on my desktop.
I use a sqldatareader to traverse the results of a query that delivers 2 fields: (1) the filespec, and (2) the image field.
I use a filestream with a binary writer to write the contents of the image data to the pocketpc's storage card.
I have a test table with 10 images, not one more than 4 MB. I cannot complete a test run prior to receiving the general network error.
The pocketPC is connected via activesync to the desktop, and I connect to the database with:
Integrated Security=false;
user id=sa
password=admin.
Any help with this strange error would be greatly appreciated.
Wil
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Oct 11, 2006
Hi I get a "General Network Error Check network documentation" error sometimes, but its only while insert or update statements are fired while selects keep working perfectly.
The Error details are as follows:
General network error. Check your network documentation.
Description: 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.Data.SqlClient.SqlException: General network error. Check your network documentation.
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.
Stack Trace:
[SqlException: General network error. Check your network documentation.]
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream)
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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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Aug 16, 2005
Hi,I am getting the following error (When i am trying to update the column thru windows service) Please let me know the solution for the following.The following error is comming only when i set CommandTimeout to infinity (Commandtimeout=0).General network error. Check your network documentation. Number 11 Procedure ConnectionRead (recv()). Class 20 State 0 Source .Net SqlClient Data Provider Server Line number 0 Thanks and Best RegardsNagaraju A
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Jul 28, 2007
Hi all,
What is client network and server network alias in SQL server.
when and why we should use that mean what is the requirement of ALIAS in SQL Server.
Thanks
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Mar 7, 2000
Hi All
By mirroring I mean device mirror, since I do not think that there is a database mirror
We only have disk mirror. I also know that SQLServer 7.0 does not provide Mirror, unmirror or remirror. and for this we have to refer to Windows NT disk mirroring.
I need mirroring in both versions SQL Server 6.5 and 7.0
I want to have mirror on another server. I need this for tonight.
Sincerely.
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Apr 1, 2008
I hereby let u know the steps that i undertook for performing mirroring
1. Created a database in Principal server named Mirror1 and one table named tblMirror1.( no values inside the table)
2. Repeated the same in Mirror in Witness
3. Selected the Principal server's database -->right click-->tasks-->mirror
4. from the left hand panel selected Options -->recovery model-->full
5. selected Mirroring from left hand panel-->configure secuirty-->entered mirror and witness name--Success
6. When I click on start mirroring I have an error stating
" Alter failed for database mirror1"
"Database mirroring cannot be enabled because Mirror1 database may have bulk logged changes that have not been backed up etc...."
7. followed this one
BACKUP database mirror1 TO DISK='C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLBackupmirror1_FULL.BAK'
got the answer as
Processed 160 pages for database 'mirror1', file 'Mirror1' on file 2.
Processed 1 pages for database 'mirror1', file 'Mirror1_log' on file 2.
BACKUP DATABASE successfully processed 161 pages in 0.318 seconds (4.147 MB/sec).
According to sources
Run a restore of this backup on your mirror.
This can be done through the GUI or using a T-SQL command.
The database restore must use the NO RECOVERY option, so the database stays in a loading state.
Also the database name on the mirror must be the exact same name as the principal
RESTORE TestMirror FROM DISK='C:Backup TestMirror_FULL.BAK' WITH NORECOVERY
Hence did the below
RESTORE database mirror1 FROM DISK='C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLBackupmirror1_FULL.BAK' WITH NORECOVERY
ERROR
Msg 3201, Level 16, State 2, Line 1
Cannot open backup device 'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLBackupmirror1_FULL.BAK'. Operating system error 2(The system cannot find the file specified.).
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.
HENCE MODIFIED AS
use master
go
RESTORE database mirror1 FROM DISK='C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLBackupmirror1_FULL.BAK' WITH NORECOVERY
Msg 3201, Level 16, State 2, Line 1
Cannot open backup device 'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLBackupmirror1_FULL.BAK'. Operating system error 2(The system cannot find the file specified.).
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.
========
Kindly let me know please where am i going wrong
Regards
cmrhema
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Mar 13, 2007
hello
if i run dbcc dbreindex on a database thats the principal in a mirrored pair, will the mirrored database indexes also be rebuilt?
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Mar 27, 2007
i am for the first time creating the database mirroring.I am moving the all the usr databases and everything from test server to a new server called test1.And from that new server i am restoring on the another new server called test2 for database mirroring.But in the test server , the transaction logs are backup for every 15 minutes.So in this case is there a need to move all the logs to test1 and then to test2 for mirroring?? or there is no need to move transaction logs to the new servers at all??
my secnario
------------
server1 server2 server3
-------- ------- --------
test test1 (moving everything from test) test2(mirror for test1 )
all the transaction logs are backup in test for every 15 minutes. so in this case , do i need to move the transcation logs from test to test1 and test2
or there is not need to move at all??
thanks,
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Nov 7, 2007
Can anyone please tell me what mirroring is??
Thanks in ADvance
RKNAIR
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Jan 30, 2008
I have sql server 2005 on my vista laptop.
When i set up database mirroring, do i have to set up Principle,
mirror and witness on seperate servers as well as seperate instances.
Or can i install 3 seperate instances on the same laptop im using and still use mirroring? I have tried to start mirroring with all three instances on my laptop but i receive an error.
Regards
Rob
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