Low Latency Publish-Subscribe

May 4, 2007



Hi,



I have a couple of questions to make.



How can i trigger notifications to my application ( C#)

without hanging in WaitFor Operation??



It's possible for broker service to call some remote

object that my application provide ???



Can Publish/Subscribe using Broker Service be used

for a low latency notifications (150ms ) max with milions of

messages published per second??



Thanks in advance



Sérgio

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Feb 20, 2007

Well, it's happened again. An upgrade to SQL server was released without my having any idea about it. SP2 came out today and the only way I knew it was I happened to see a headline on Yahoo. Similar things have happened in the past with HotFixes or security rollups. Sometimes it's rather embarrassing, especially when your boss challenges you on the most recent security updates for SQL. Is there any way which we can be notified of new upgrades/updates to SQL Server? I need to know when there is a new hotfix, update, service pack, or whatever so that I can install it as needed. So far, the only way I've found these was by accident. I'm signed up with the Microsoft Download Notification email list, so I was able to see that SP2 CTPs were released, but I've never seen it include hotfixes or rollups.

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May 25, 2007

Hi,

On the development environment i've got replication running with no trouble but when deploying in the production environment i get the error below

Has anyone seen this before and solved it?
Another question: How to enable verbose history when using the MS SQL Server Management Studio to create a subscription.

Any help is welcome,

Ralf


TITLE: Microsoft SQL Server Management Studio------------------------------A call to SQL Server Reconciler failed. Try to resynchronize.HRESULT 0x80004005 (29006)The schema script 'd:MSSQL
epldatauncTEST_KANSCE TEST20070522165445 blNaw_2.sch' could not be propagated to the subscriber.HRESULT 0x80070003 (0)The merge process was unable to deliver the snapshot to the Subscriber. If using Web synchronization, the merge process may have been unable to create or write to the message file. When troubleshooting, restart the synchronization with verbose history logging and specify an output file to which to write.HRESULT 0x80045017 (0)------------------------------BUTTONS:OK------------------------------

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hi

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hi,



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Hello,

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www.pdaddict.nl



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Jun 12, 2008

CREATE PROCEDURE [dbo].[proc_replication_latency_monitor]
AS

-- Procedure created by Henning Frettem (Lumbago), www.sqlteam.com, 12th of June 2008

BEGIN

SET NOCOUNT ON

DECLARE
@PublishedDBName varchar(200),
@SQL nvarchar(2000),
@PublicationPK int,
@PublicationName varchar(200),
@PublicationDatabase varchar(200),
@TracerTokenID int,
@Parmameters nvarchar(500)

DECLARE @Publications table (
PublicationPK int IDENTITY(1, 1) PRIMARY KEY CLUSTERED,
PublicationDatabase varchar(200),
PublicationName varchar(200),
TracerTokenID int,
TracerTokenPostTime datetime
)

DECLARE @Latency table (
PublicationPK int,
DistributorLatency bigint,
Subscriber sysname,
SubscriberDB sysname,
SubscriberLatency bigint,
OverallLatency bigint
)

--> Cursor for fetching all publications in all databases
DECLARE curPublishedDatabases CURSOR LOCAL FAST_FORWARD FOR
SELECT [name] FROM sys.databases WHERE is_published > 0

OPEN curPublishedDatabases
FETCH curPublishedDatabases INTO @PublishedDBName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @SQL = N'SELECT ''' + @PublishedDBName + ''', [name] FROM ' + @PublishedDBName + '.dbo.syspublications'
INSERT INTO @Publications (PublicationDatabase, PublicationName)
EXEC sp_executesql @SQL

FETCH NEXT FROM curPublishedDatabases INTO @PublishedDBName
END

CLOSE curPublishedDatabases
DEALLOCATE curPublishedDatabases

--> Cursor for posting tracer tokens
DECLARE curPublications CURSOR LOCAL FAST_FORWARD FOR
SELECT PublicationPK, PublicationDatabase, PublicationName FROM @Publications

OPEN curPublications
FETCH curPublications INTO @PublicationPK, @PublicationDatabase, @PublicationName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @Parmameters = N'@PublicationName varchar(200), @TracerTokenID_OUT int OUTPUT';
SET @SQL = N'EXEC ' + @PublicationDatabase + '.sys.sp_posttracertoken @publication = @PublicationName, @tracer_token_id = @TracerTokenID_OUT OUTPUT'
EXEC sp_executesql @SQL, @Parmameters, @PublicationName = @PublicationName, @TracerTokenID_OUT = @TracerTokenID OUTPUT

UPDATE @Publications SET
TracerTokenID = @TracerTokenID,
TracerTokenPostTime = GETDATE()
WHERE PublicationPK = @PublicationPK

FETCH NEXT FROM curPublications INTO @PublicationPK, @PublicationDatabase, @PublicationName
END
CLOSE curPublications
DEALLOCATE curPublications

--> Wait two minutes for all tokens to be commited at all subscribers
WAITFOR DELAY '000:02:00.000'

--> Then check the results for each posted token
DECLARE curTokens CURSOR LOCAL FAST_FORWARD FOR
SELECT PublicationPK, PublicationDatabase, PublicationName, TracerTokenID FROM @Publications

OPEN curTokens
FETCH curTokens INTO @PublicationPK, @PublicationDatabase, @PublicationName, @TracerTokenID
WHILE @@FETCH_STATUS = 0
BEGIN
--> Insert token history for each token
SET @SQL = N'EXEC ' + @PublicationDatabase + '.dbo.sp_helptracertokenhistory @publication = ''' + @PublicationName + ''', @tracer_id = ' + CAST(@TracerTokenID AS VARCHAR(50)) + ''
INSERT INTO @Latency
(DistributorLatency, Subscriber, SubscriberDB, SubscriberLatency, OverallLatency)
EXEC sp_executesql @SQL

--> Make sure that the PublicationPK is added to the token history
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--> Clean up the tracer token
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EXEC sp_executesql @SQL

FETCH NEXT FROM curTokens INTO @PublicationPK, @PublicationDatabase, @PublicationName, @TracerTokenID
END
CLOSE curTokens
DEALLOCATE curTokens

SELECT
b.PublicationDatabase,
b.PublicationName,
a.Subscriber,
a.SubscriberDB,
a.OverallLatency,
b.TracerTokenPostTime
FROM @Latency a
INNER JOIN @Publications b
ON a.PublicationPK = b.PublicationPK

END

--
Lumbago

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Hello!

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Any help is greatly appreciated.

Thanks,
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Windows Server 2012 R2 StandardSQL Server 2014 CU6 (12.0.2480)Visual Studio Premium 2013 (12.0.31101.00) Update 4 

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<o:p></o:p>
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Sourcespid10s

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Hello,
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Jun 14, 2007

i am trying to publish an indexed view logbased publication but I'm getting "must be a schema-bound view with at least a clustered index to be published as a log-based indexed view article."

The table has clustered index and the view is schema-bound.



this is the script for schemabinding

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

ALTER VIEW [nth].[musictracks1] with schemabinding

AS

SELECT autoid,idtrack,songname,singer,writer,composer,center

FROM nth.musictracks

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO



and this is for making the publication an indexed view logbased publication



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@publication = N'lb_publication',

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@source_object = N'musictracks1',

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@description = null,

@creation_script = null,

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@schema_option = 0x0000000008000001,

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@destination_table = N'musictracks1',

@destination_owner = N'nth'

GO



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Thanks,

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Hi,

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