Queues And Filegroups
Apr 19, 2006Hi
We can create a queue on a filegroup for performance reasons however what about the sys.transmission_queue which could have messages backing up when the target is down.
What are your thoughts.
Cheers
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Many Queues And One Activation Procedure For That Queues.
Sep 22, 2006Hi, All!
Could you please help me in my problem?
I develop Service Broker applcation, SB has 20 queues, also I have one Activation Procedure which carries out following actions:
CREATE PROCEDURE proc_ms_Activation
AS
BEGIN
WAITFOR (RECEIVE TOP(1) message_type_name, message_body, conversation_handle, message_id FROM Queue1)
-- process message, save statisctisc and etc
END
Problem in that: when I execute command WAITFOR (RECEIVE TOP (1) message_type_name, message_body, conversation_handle, message_id FROM Queue1) I should specify a name concrete Queue, for example "... FROM Queue1 ". I would like to use one procedure for processing all Queue.
How I can design my application that one Activation Procedure processed messages from all Queues?
Thank a lot for help.
How To Write .net Code To Place XML Messages On Queues And Retrieve XML Messages From Queues.
Apr 2, 2008Hello, please help!!
I have spent days searching the web and forums for an answer to this simple question and cannot find an example.
I have built a service broker application on sql server 2005. The application puts some xml on an incoming queue which is basically a few parameters to be used in a query. This queue will then call a stored proc which does some business logic and puts the resulting results in another queue also in xml.
I have written a test harness in SQL to put messages on the inbound queue and then some sql to retrieve the returned code from the outbound queue.
What I want to do is be able to convert the SQL which does this into .net code to be used by an application. i.e. write in .net some code to put xml on a queue and then write some .net code to retrieve xml from another queue.
I wouldn't have thought this would be a difficult thing to do and would have been done hundreds of times, but unable to find anything to simply send and retrieve XML to service broker queues....
thanks for your help.. its really needed. I found some links, but they are really vague and often doing select statments in service broker or something like this. I don't want to call any sql, just send and recieve XML on the queues.
any example code that does this, would be really helpfull
kind regards,
David Weeden
Database Developer
Always Two Queues?
Jul 27, 2006I'm just getting around to understanding notification services in sql 2005 and I have been working through some examples. I'm curious as to why there are always two queues and two corresponding services being set up even when both queues/services exist in the same database. Here is my ultimate goal. I want to have triggers put messages on the queue for various stored procedures to handle asynchronously - i.e. table xyz is updated, and I need a stored proc to take the updated values and possibly generate or update rows in another table. When I tried to set up one queue and one service, nothing ever seems to get put on the queue:
Create Message Type TestMessageType Validation = Well_Formed_XML;
Create Contract TestContract (TestMessageType Sent By Any);
Create Queue TestQueue;
Create Service TestService ON Queue TestQueue(TestContract);
Begin Tran;
Declare @DialogHandle UNIQUEIDENTIFIER;
Begin Dialog Conversation @DialogHandle
From Service TestService
To Service 'TestService'
On Contract TestContract
Send On Conversation @DialogHandle
Message Type TestMessageType (N'<message>Hello World</message>');
End Conversation @DialogHandle;
Commit Tran;
Select * From dbo.TestQueue;
(nothing is ever returned)
No Messages In The Queues.
Mar 10, 2006Hello,
I'm trying to do a very simple example of sending a message from Initiator queue to Target queue. The result is no messages are delivered.
Here's the code:
DECLARE @conversationHandle UNIQUEIDENTIFIER
BEGIN DIALOG CONVERSATION @conversationHandle
FROM SERVICE GmiInitiatorService
TO SERVICE 'GmiTargetService'
ON CONTRACT GmiContract
WITH ENCRYPTION = OFF;
SEND ON CONVERSATION @conversationHandle MESSAGE TYPE GmiMessage ('test');
END CONVERSATION @conversationHandle
All three queues are empty (Initiator, Transmission, Target). When I comment out the last line ("end conversation"), the messages get stuck in the Initiator queue.
Please help!!
Thank you.
Timeouts - Disk Queues
Jul 20, 2005HiGot a strange problem.For some reason our web client box times out occasionally. Maybe afew times a day.Nothing appears in the logs.What I do know is that the disk queue ramps up to <high>(think top ofthe graph), processor queue jumps up and the tps drops to 0 (naturallyenough!) along with reduced pagefile usage. Usually at this time thetps is between 20 and 300. Running a pair of mirrored 18gb scsi disksfor the whole server (yeah yeah) and a whopping 640mb memory. Oh anda single piii 1 gig. Sql2k standard vanilla, server2k.What server trace events is it worth my catching to try and get abetter Idea of what may be causing this? No major jobs (backups etcseem to be occuring at these times).Cheers
View 1 Replies View RelatedInconsistent Performance From Queues
Nov 13, 2006Hi everyone! I have a very brief question... I have 10 queues in my database and each of them are sent equal number of messages... There are instances where they execute/activate the stored procedures very fast but there are times where they don't, does anyone have an idea why this happens?
Thank you very much for taking the time to read my post. :)
Number Of Queues Best Practice ?
Aug 14, 2006Hi There
In terms of scaling out Service Broker to hundreds of instances, would it be better from a performance perspective so have one queue with all the messages coming in(obviously with a high number for max_queue readers), or create a number of queues and spread the messages across them ? Or is there no significant difference.
The one reason i am leaning towords multiple queues is so that is poison messages are found or a something lese goes wrong with a queue not all messages are affected, however creating multipple queues makes it more complex and required more administration ?
Any general best practice when it comes to this ?
Thank You
Duplicte Masseages In Target Queues
Jun 20, 2007Hi
We have problems with duplicate messages in Service Broker queues. We have tried the "fire and forget" method.
Senario
Initiator doing SEND and END Conversation , target doing RECEIVE and End Conversation ,
Sql servar agent job runing every minute doing End conversation with cleanup in sys.conversations_endpionts queue.
We are runing 5000 - 10000 messages per minute.
When the clean up job is running we get som duplicte messages in the target queue.
Enviroment
Two separate machines runing Sql Server 2005 Standard Editon SP2
Initiator Machine
CREATE MESSAGE TYPE [TransactionStatisticsSend] AUTHORIZATION [dbo] VALIDATION = WELL_FORMED_XML
CREATE CONTRACT [TransactionStatistics] AUTHORIZATION [dbo] ([TransactionStatisticsSend] SENT BY ANY)
CREATE QUEUE [dbo].[TransactionStatisticsQueueActive] WITH STATUS = ON , RETENTION = OFF
ON [PRIMARY]
CREATE SERVICE [TransactionStatisticsServiceActive] AUTHORIZATION [dbo] ON QUEUE [dbo].[TransactionStatisticsQueueActive] ([TransactionStatistics])
CREATE ROUTE [Route::TransactionStatisticsServiceStat,0705DBB2-8CBA-43BC-A8FF-774A27F8ABC0] AUTHORIZATION [dbo] WITH SERVICE_NAME = N'TransactionStatisticsServiceStat' , ADDRESS = N'tcp://EBSDBCONFIG1A:4022'
CREATE REMOTE SERVICE BINDING [RSB::TransactionStatisticsServiceStat] AUTHORIZATION [dbo] TO SERVICE N'TransactionStatisticsServiceStat' WITH USER = [Proxy::BtsDebitServiceStat] , ANONYMOUS = OFF
CREATE ENDPOINT [EBSDBCURR1A_BROKER]
AUTHORIZATION [BTSTULLENtsappl]
STATE=STARTED
AS TCP (LISTENER_PORT = 4022, LISTENER_IP = ALL)
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED
, MESSAGE_FORWARD_SIZE = 10
, AUTHENTICATION = CERTIFICATE [EBSDBCURR1A]
, ENCRYPTION = REQUIRED ALGORITHM RC4)
ALTER PROCEDURE [dbo].[Bts_SP_TransactionStatPrepare]
(@TransferID varchar(30))
AS
declare
@RowCount Int,
@ErrorSave Int,
@Msg xml,
@dialog_handle UNIQUEIDENTIFIER
Begin
BEGIN TRY
set @msg = (Select
Regtime,
SendPartShortName,
RecPartShortName,
MsgType,
From btslogactive.dbo.StatTransferlog Tl
where TransferID = @TransferID
FOR XML RAW)
BEGIN DIALOG CONVERSATION @dialog_handle
FROM SERVICE [TransactionStatisticsServiceActive]
TO SERVICE 'TransactionStatisticsServiceStat'
ON CONTRACT [TransactionStatistics]
WITH ENCRYPTION = OFF ;
SEND ON CONVERSATION @dialog_handle
MESSAGE TYPE [TransactionStatisticsSend]
(@msg) ;
END CONVERSATION @dialog_handle
END TRY
BEGIN CATCH
SELECT
ERROR_NUMBER() as ErrorNumber,
ERROR_MESSAGE() as ErrorMessage;
END CATCH
End
Target Machine
CREATE MESSAGE TYPE [TransactionStatisticsSend] AUTHORIZATION [dbo] VALIDATION = WELL_FORMED_XML
CREATE CONTRACT [TransactionStatistics] AUTHORIZATION [dbo] ([TransactionStatisticsSend] SENT BY ANY)
CREATE QUEUE [dbo].[TransactionStatisticsQueueStat] WITH STATUS = ON , RETENTION = OFF
, ACTIVATION ( STATUS = ON , PROCEDURE_NAME = [dbo].[Bts_SP_TransactionStatUpdateBroker] , MAX_QUEUE_READERS = 1 , EXECUTE AS N'dbo' ) ON [PRIMARY]
CREATE SERVICE [TransactionStatisticsServiceStat] AUTHORIZATION [dbo] ON QUEUE [dbo].[TransactionStatisticsQueueStat] ([TransactionStatistics])
CREATE ROUTE [Route::TransactionStatisticsServiceActive,D8A1A78B-CEAD-4C63-B3B3-3C986D2AB3AA] AUTHORIZATION [dbo] WITH SERVICE_NAME = N'TransactionStatisticsServiceActive' , BROKER_INSTANCE = N'D8A1A78B-CEAD-4C63-B3B3-3C986D2AB3AA' , ADDRESS = N'tcp://EBSDBCURR1A:4022'
CREATE ENDPOINT [EBSDBCONFIG1A_BROKER]
AUTHORIZATION [BTSTULLENtsappl]
STATE=STARTED
AS TCP (LISTENER_PORT = 4022, LISTENER_IP = ALL)
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED
, MESSAGE_FORWARD_SIZE = 10
, AUTHENTICATION = CERTIFICATE [EBSDBCONFIG1A]
, ENCRYPTION = REQUIRED ALGORITHM RC4)
Activation procedure
ALTER PROCEDURE [dbo].[Bts_SP_TransactionStatUpdateBroker]
AS
DECLARE @MessageType sysname
DECLARE @ConversationHandle uniqueidentifier
DECLARE @MessageBody XML
DECLARE
@RegTime datetime,
@SendPartShortName varchar(30),
@RecPartShortName varchar(30),
@RC int
BEGIN TRANSACTION;
WHILE (1=1)
BEGIN
WAITFOR
(
RECEIVE TOP (1)
@MessageType = message_type_name,
@MessageBody = message_body,
@ConversationHandle = conversation_handle,
@SeqNo = message_sequence_number
FROM [TransactionStatisticsQueueStat]
), TIMEOUT 5000;
IF (@@ROWCOUNT = 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
IF (@MessageType = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog')
BEGIN
END CONVERSATION @ConversationHandle
BREAK
END
ELSE IF (@MessageType = 'http://schemas.microsoft.com/SQL/ServiceBroker/Error')
BEGIN
END CONVERSATION @ConversationHandle
BREAK
END
ELSE IF (@MessageType = 'TransactionStatisticsSend')
BEGIN
Begin try
SET @RegTime = @MessageBody.value('(/row/@Regtime)[1]', 'datetime')
SET @SendPartShortName = @MessageBody.value('(/row/@SendPartShortName)[1]', 'varchar(30)')
SET @RecPartShortName = @MessageBody.value('(/row/@RecPartShortName)[1]', 'varchar(30)')
SET @MsgType = @MessageBody.value('(/row/@MsgType)[1]', 'varchar(30)')
.
End try
BEGIN CATCH
SELECT
ERROR_NUMBER() as ErrorNumber,
ERROR_MESSAGE() as ErrorMessage;
END CONVERSATION @ConversationHandle
BREAK
END CATCH
-- EXEC @RC = SP_XXXXX
END
END CONVERSATION @ConversationHandle
BREAK
END
END
COMMIT TRANSACTION
RETURN
Sql Server Agent job procedure
ALTER PROCEDURE [dbo].[Bts_SP_Del_Conversation_Endpoints]
AS
begin
DECLARE c_PurgeConversationEndpoints CURSOR FAST_FORWARD
FOR SELECT conversation_handle
FROM sys.conversation_endpoints
with (nolock)
WHERE is_system = 0
AND [State] = 'CD';
OPEN c_PurgeConversationEndpoints;
DECLARE @DialogHandle UNIQUEIDENTIFIER;
FETCH NEXT FROM c_PurgeConversationEndpoints
INTO @DialogHandle;
WHILE @@FETCH_STATUS = 0
BEGIN
END CONVERSATION @DialogHandle WITH CLEANUP;
FETCH NEXT FROM c_PurgeConversationEndpoints
INTO @DialogHandle;
END
CLOSE c_PurgeConversationEndpoints;
DEALLOCATE c_PurgeConversationEndpoints;
end
How To Mirror Service Broker Queues
Jan 4, 2007Hi,
I want to know that how is it possible to achieve mirroring for the service broker queues in the database?
How Service Broker Queues Can Be Mirrored?
Jan 4, 2007Hi,
I want to know that how is it possible to achieve mirroring for the service broker queues in the database?
Using Message Queues In Stored Procedures
Oct 11, 2005Ok, I'm stumped. I have a database which has a table that stores documents. Each document has a primary key. For years, I've been notifying an external program that a new document has arrived in the db by firing a trigger on the table. Trigger calls xp_cmdshell, which calls an external program which enqueues a message on a message queue.
View 6 Replies View RelatedEND CONVERSATION WITH CLEANUP, Is This Bad? Records Pile Up In Queues Without It.
Sep 13, 2006I have read from a variety of sources that using the "WITH CLEANUP" option on
a "END CONVERSATION" statement is bad and unnecessary. (Question
#1) Is this true???
My code does not work properly if I don't
use the "WITH CLEANUP" option. My code leaves closed conversation records in the
queues if I leave out the "WITH CLEANUP" option. The "END CONVERSATION"
statement is executing properly and flagging the conversation record as closed
but the records don't get deleted. All the messages are going back and forth
properly too.
My code is based on the HelloWorld ServiceBroker sample
which does not use "WITH CLEANUP". When I run the sample scripts everything
works great and the conversation records are deleted. However, this sample does
not uses an activation stored procedure to receive messages and respond with the
results. When I copy and paste the receive messages sample code into an
activation stored procedure is when the problem comes up. It's the same code!
(Question #2) Why am I getting different results depending
how the code is executed/activated???
This is could be a tough one. I
just hope somebody else has seen it too and figured it out. Thanks for the
help!
Thanks,
Greg Van Mullem
Monitoring Service Broker Queues Through A .NET Process
Jul 19, 2007Is there a way for a .NET application to receive a notification when a service broker queue has been updated with a new message? I tried using SqlDependency on an SB queue but I got an "invalid" error in my notification handler.
Such a notification would be much better than having to poll the queue every N seconds.
Thanks
Interesting Behavior Of Service Broker Queues
Dec 23, 2005Hello All:
I've been experimenting with the new SQL Server Service Broker, and I think I've discovered some interesting behavior. Service Broker relies on "Queues" to store messages that need to be processed. Service Broker operates by sending a message from one Queue (the INITIATOR Quque) to another Queue (the TARGET Queue). A Queue can have an "Activation Stored Procedure" associated with it. This procedure is what actually processes the messages in the Queue.
The first behavior I obeserved related to the setting of a Queue's RETENTION parameter. The RETENTION parameter indicates whether or not the Queue will retain a copy of the messages it receives. By default, the parameter's value is "OFF" (meaning it will not retain messages). In the Activation Stored Procedure of my TARGET Queue, I used "sp_send_dbmail" to send an e-mail message. I wanted to capture the "conversation_handle" (a uniqueidentifier that identifies a particular message) and include it in the body of the e-mail. I was unable to capture it, because the Queue's RETENTION parameter was "OFF". When I tried to capture the conversation_handle from the INITIATOR queue (whose RETENTION parameter was "ON"), I was successful. The moral of the story is you apparently need to have RETENTION = "ON" if you need to capture information from a Queue.
The second behavior I observed relates to the setting of a Queue's MAX_QUEUE_READERS setting. This setting allows you to automatically invoke multiple instances of the Activation Stored Procedure. As messages come into the Queue, the Queue creates an additional instance of the Activation Stored Procedure up to the number you specified in the MAX_QUEUE_READERS setting. This allows parallel processing of messages in the Queue. There is also a programming technique called a "RECEIVE LOOP" which is used for processing messages. In the RECEIVE LOOP, you have a parameter called WAITFOR which tells the Queue whether it should stay on constant alert for new messages or whether it should time out after a specified number of seconds.
If you have the Queue wait indefinitely (by not specifying a TIMEOUT value in the WAITFOR statement) and you have invoked multiple copies of the Activation Stored Procedure, the procedure will remain in memory indefinitely. Therefore, if you make a change to the code of the Activation Stored Procedure, the change will NOT be reflected in the Activation Stored Procedure until you change the STATUS of the Queue. I had changed my procedure so that it would not send an e-mail, but the e-mails kept coming. The e-mails did not stop until I executed an ALTER QUEUE statement. I ran "ALTER QUEUE queue_name WITH STATUS = OFF;" and then I ran "ALTER QUEUE queue_name WITH STATUS = ON;" After that, the changes were reflected in the procedure.
Be aware of this behavior as you design your Queues.
Designing SSB Queues, EA Sample And Unreliable Interdependant NTFS Tasks
Feb 21, 2006Our current project involved into managing NTFS hierarchical folders structured by multi-level customers and associated projects for them. Essentially each folder level represents one level of customer hierarchy or project root. Both have different subfolders and user access rights for them based on generic XML templates. The folders resided on file servers across the country and should be accessible in ordinary way NTFS file shares are allowing. LAN/Intranet MS AD Win2003 / SQL2005 environment.
The folder management system basically have to keep the folder structure in tact with changes in underlying managing application logic. That involves such operations as creating a new folder with subfolders, copying a folder with its content into another folder branch (which may be on the same or another server and place), deleting a folder/content, renaming a folder, applying NTFS access rights to folders and subfolders for users according generic templates. As all these actions are unreliable and some tasks may take hours to complete, SSB approach seems to be the viable solution. Some tasks involved have to be done within 10 minutes, others (are prolonged) have to be scheduled for overdnight run. Windows service like EA sample may be used to start the actual NTFS related tasks. Content transfer involves WMI remoting with robocopy tool on target machine (for better network utilization), other related tasks make use of WMI APIs and probably do direct (i.e. synchronous) calls to the remote target file server.
At this stage, making atomary executable modules that do just one functionally isolated task like DirCopy, DirCreator, DirRename, DirDelete, DirUserAccess seems like somewhat logical choice.
The questions starting to arise from SSB queues planning to adoption of ExternalActivator sample to run these atomic executables. The problem is that if SSB messages contain atomic tasks for these executables, they needed to be syncronized in two ways - by execution precedence (create or copy dir first, then apply users' access rights) and transactionally (only when all related tasks succeed, the appropriate feedback action and event log writing can be taken.
I can imagine two implementation scenarios below.
Case A. Create common queue for directory creating, content transfer and access rights.
In that case ExternalActivator has to be either extended & re-designed or it has to activate another Activator-Coordinator (middleway) executable, that would actually read the queue and, based upon the message type, run the appropriate atomary executable. In that scenario, the queue processing would be stalled because if the previous task was content transfer and lasts, say access rights to them can't be started before the transfer task has been finished OK. That in turn probably will require running multiple instances of the atomary tasks and using conversation groups, wouldn't it? What would be the most reliable and simple way to achive that?
Case B. Dedicated queues for each atomary executable modules.
Neither EA changes nor extra Activator-Coordinator middleway executable required. But because the atomary task-oriented queues are not syncronized with each other the queues internal conversation groups wouldn't help much... That means if a directory not yet exists, userRights module have to wait. But, what if we are transferring directories from path X to Y, based on what the userRights module knows to wait? With zero asynchronous design experience I'm lost here...
Hope I described the app domain understandably, thanks for hints leading to the working solution!
Filegroups
May 25, 2000I was told to move tables to new filegroups by placing the clustered index on the filegroup and the table would
follow. There are times when I see tables listed on the new filegroup but still listed also on Primary. My goal is
to have only system tables on Primary. How can I get a table to totally leave the PRIMARY group?
There seems to be a system index on the table that was not created by me.
FileGroups
Jan 23, 2001I have databse that was created when I got here and the database was created with 3 file groups. The tables in the database are spread out over the 3 file groups.
How can I find out which table belongs to which file group.
Thank You,
John
FileGroups
Oct 8, 1999If I'm running RAID 5, is it still good practice to split system and user data onto separate filegroups ? .....
On separate disks ?
Thanks in advance..
Any comments welcome ! Peter
Filegroups ?
Oct 8, 1999If I'm running RAID 5, is it still good practice to split system and user data onto separate filegroups ? .....On separate disks ? Thanks in advance..
Any comments welcome ! Peter
Filegroups
Feb 8, 2006Hi,
I was wondering if there is a downside of placing individual tables into their own filegroup (i.e., 1:1). This would seem to allow me to continue to backup entire databases but give me the flexibility to restore at a table level if necessary. I ask this because the number of filegroups allowed per database has increased from 256 in SS2000 to 32K in SS2005. What kind of headaches could I get into if I follow this type of design ?
Thanks,
Mario
Filegroups
Sep 22, 2005i want to obtain information about all the filegroups for every database. is there a special command to obtain this information like the dbcc sqlper or something similar ??
View 1 Replies View RelatedFilegroups
Oct 8, 2007hi all,
What is the purpose of files?(primary secondary,transaction log ). what is the use of these files?
Filegroups In Sql7
Jul 21, 2000Is there a way to list all the tables in each of the filegroup
in a database. I have a database with 7 filegroups and would like
to have a list of tables in each filegroup
Sp_helpfilegroup gives you list of filegroups and the names of files
Filegroups In SQL7.0
Jan 23, 2001Is there any way in which I can move an objects/ data to another
filegroup using transact sql?
I have created a table such that the data is on a secondary filegroup.
But the table has image and text data and this data is going to
the PRIMARY filegroup.
I tried chnging the filegroup for the text data but this property but does not change(I did it through EM).
As a result, the disk which contains the primary filegroup is getting filled up.
I have configured my database such that the primary file group is on one disk and the secondary on another and the log on the same disk as the primary filegroup.
I have given lesser space to the primary file group and more space to the secondary filegroup.
help on this is greatly appreciated because my system is rapidly growing with respect to data.
thanks and best regards
Sush.
Files/Filegroups
Sep 10, 1999I was under the impression that if you are using multiple files in your filegroup to store your data that the data should be written evenly across the files.
I have 5 files and the data is being written to only one file which is growing rather large, while the other files are still at 5 - 7 MB. They are all marked for Automatic Growth at this point, but only the 1 file is growing.
Is there something else that needs to be done to enable this? BOL left me with the impression that this is automatic.
Backup With Filegroups
Sep 14, 2006We are going to start using fielgroups to move some indexes to a different RAID. Simple ? is, when you do a full database backup, that backup alss contains the new filegroup?
View 2 Replies View RelatedFilegroups In Sql Server...
Feb 9, 2006hi all,
i have a problem with creating filegroups in sql server...i just want to copy the names of the columns from one table into my filegroups...
this is my problem : i m writting the following code in tsql:
SELECT * INTO Sales FROM Sales1 WHERE 0=1 ON [MyFG1]
Can anyone please help meeee???? i'd like it to work this way, to copy only first column names from Sales1 to Sales but in this filegroup.
if this is not the write way...then can anyone please tell me the right syntax and the way to copy just the names into a filegroup?????
thanx in advance.
Regards.
Filegroups Question
Jul 18, 2007Hello everyone -
Currently the setup is a single filegroup sql machine
with each company as a new database in a single system.
Would breaking the companies into thier own filegroups
be benefitial?
or perhaps creating a instance of SQL for each company be a better approach?
thoughts / ideas would be appreciated
thanks
tony
Files && FileGroups
Oct 12, 2007Hey guys I have a VLDB and I would like to point or move several tables to another filegroup.
1). Add a filegroup to the database
ALTER DATABASE dbname
ADD FILEGROUP filename_table
go
2). Add a file to the file group
ALTER DATABASE dbname
ADD FILE
.....
TO FILEGROUP filename_table
go
If a table is already part of the primary filegroup:
Can I change it to another filegroup?
When changed to the another filegroup will it move the whole table to the other filegroup or just start to write data to the newly created filegroup?
Indexes And Filegroups
May 19, 2004I'm fishing for some advice here.
I'm porting an old Access 97 application to SQL Server 2000. The Access app uses 9 separate files for a series of linked tables (one table in each file to get around the 1Gb Access file size limit). The tables vary in size form 2Mb to 800Mb so the whole data set weighs in at around 6Gb.
I've prepared tables for the data in SQL Server and assigned each table into its own filegroup each of whihc has its own file so I can separate the data out and also keep an eye on the amount of data.
My next problem is the indexes. The Access tables don't have primary keys. My SQL tables do (Large Integers) but each table is mainly indexed on an account number which is an 11 char alphanumeric. This is non unique so I can't use it as a primary key.
At present I have all the table indexes in the PRIMARY filegroup (which in tunr just has the default MDF file in it)
I've built a small version of the DB for testing various triggers and new views and the DTS import packages and the indexing for the 300Mb of data I have now is obviously fairly quick. I am wondering if I should split the indexes out into each of the separate MDF files that I am storing the table data or should I split the indexes into their own files?
I want this thing to be fast. The VBA app that will be plugging into the DB has a huge amount of code and currently struggles especially when several dozen people are all connected to the same tables.
So any advice? Indexes in separate files? Or in with the data? or all together in one index file? Any performance impacts I should be aware of?
The DB is running on its own dedicated box. Its not huge 1Gb Ram, 30Gb drive and a 3Ghz P4. But given that it isn't running anything else it should be up to the job. It should certainly be faster than the current shared drive that the access app runs from.
many thanks
Steve
Question With Filegroups
Jul 23, 2005I'm trying to tweak our DB as much as I can. We have the full applicationdatabase sitting on a RAID 10. Logs, tempdb, etc.. are on separate arrays.I read some articles about making separate filegroups. Of course, they allsay to move them to different arrays, which because of budget is notpossible right now. I also read articles that say to put large tables in afilegroup then add another data file to the group. This allows SQL Serverto use multiple threads to access the tables. Therefore, to my question.If I split our database up into multipele file groups on the same array,could I see a performance gain. Would the database be able to issuedifferent threads for each group when a query is run and improve overallperformance.Thank you,Adam
View 2 Replies View RelatedLog Shipping && Filegroups
May 7, 2008Hi Guys,
I need some help for my Log Shipping database please.
I have a database X on the production server and on the log shipping standby server (Read-only). The logs on the production server is shipped to the standby server. The standby server restores the logs through a schedule job.
Now what happended is couple of days back we created another filegroup (Secondary) on the production server for the database X to keep our history separated from the most current data. When we created the secondary filegroup our logs on the log shipping server cannot restored. We investigate the problem and found that there is no secondary filegroup attached to our database X on the log shipping server, which is obvious.
My question now is there a way we can create a secondary filegroup for the database X on the log shipping server without breaking our existing log shipping? Do we must restore the full backup of the database X on the log shipping server in order to keep the transaction logs applied on the log shipping database X?
Please help.
Thanks.