Replication Via Web, New Subscriptions And Snapshots
Sep 27, 2006
Hi everybody, I'm quite new to SQL 2005 and I€™m trying to understand some key concepts regarding replicas. I need to develop an application with characteristics similar to the Sales Order Sample for Merge Replication, on the client side it should run with the express version of sql server and also the synchronization should only work via web. I try to run the sample but I got an exception in the CreateSubscription method on invoking publisherConn.Connect();
TITLE: Microsoft.SqlServer.ConnectionInfo
------------------------------
Failed to connect to server XXX.
------------------------------
ADDITIONAL INFORMATION:
Login failed for user ''. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)
I can€™t understand how this connection could work if it isn€™t aware of the fact that it should use https to connect with the server.
Can someone point me in the right direction?
Thanks
Angelo
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Apr 17, 2008
I am programatically adding and creating snapshots and subscriptions in report services from my application I created.
1) Is there a way to create a snapshot with user defined parameters? If so how would you do this programatically with the Web service?
2) How do you create a subscription with user defined parameters? Do you do this with a data driven subscription? or do you use another webservice method to do this?
Thanks!
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Aug 28, 2007
I am having the huge db of 80 GB and trying to configure merge replication. The intial snapshot application is failing due to some schema issues. I have made some necessary changes to avoid the schema issues. If I try start the merge agent it is going to re-initialize the snapshot and reapplying the whole snapshot will take atleast 10-15 hrs.
Is there any way to resume the snapshot from the point of failure.. avoiding the reapplying all the data which has already got transfered to subscriber.
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Jun 13, 2007
I have been trying to set up replication with updateable subscriptions. I first followed the tutorial on MSDN and set up basic transactional replication. This all worked fine. I then tried, using that tutorial as a basis, to set up replication with updatable subscriptions.
On the Agent Security page you are asked for a Snapshot Agent, a Log Reader Agent and a Queue Reader Agent. I assigned these to the following accounts, which I created and added as logins, PUBLISHERSERVER
epl_snapshot, PUBLISHERSERVER
epl_logreader and PUBLISHERSERVER
epl_queuereader.
I then tried to set up a subscriber on SUBSCRIBERSERVER. Under the publication I add new subscriber, select the publisher, add SUBSCRIBERSERVER as the new SQL server Subscriber. In the Distribution Agent Security page of the wizard it asks for process account, which will be run when synchronizing the subscription. I entered PUBLISHERSERVER
epl_distribution here and selected the other two default options of connecting to the distributor and subscriber by impersonating the process account. I then took the default options for the next few screens and finally get to:
Login for updateable subscriptions. This offers the option of a login or using a linked server. I have tried various logins here, initially trying the €˜sa€™ login and password. This produced the error: The user is not associated with a trusted SQL Server connection. The servers are set up for mixed mode operation. I then tried PUBLISHERSERVER
epl_distribution and subsequently every other account I had created on PUBLISHERSERVER. All of these failed. I tried linking the servers, but this also failed. How exactly do you set up subscriber with the ability to login to the publisher? I have spent days trying to set this up, and am as you can gather new to this technology, any help would be greatly appreciated.
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Apr 5, 2006
I have recently deployed a sql replication system into a production environment and I€™m experiencing a few problems.
I have a server holding consolidated data (4 processor/2GB ram) and fifteen subscribers, each being a 400Mhz Celeron with 256MB ram.
Transactional replication is used to pull base data from the main server to the subscribers. This data does not change very often at the publisher, but the subscribers need an immediate update, so continuous transactional replication is configured at the subscribers. This data will never be changed at the subscriber.
The server has another three tables used for historical data. Each subscriber has been configured for merge replication on these three articles. An initial snapshot is run to setup each subscriber. Each subscriber writes up to 10 records per minute into these local tables and continuous merge replication replicates these 10 records from the subscriber to the publisher. As all subscribers are doing the same, part of the merge operation will potentially bring down 140 records to each subscriber (10 records from each subscriber merged to the publisher and back to each subscriber).
Anyway on to the problem€¦
Each subscriber system has a Microsoft.Net application writing these 10 records per minute to the local database. Refreshing a graph within the application occurs once every minute. Refreshing, queries the three local tables used for the merge replication. This application shows an error (randomly) with a sql timeout message trying to get a connection to the local database.
Has anybody got any ideas why this will occur?
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Feb 27, 2004
If I have one table in one publication in transactional replication
replication between primary and replicate is broken because subscription is marked as inactive.
If there are 3 rows on replicate and 5 rows on primary , out of which 2 are added after replication is broken
If I do
Reinitialize subscriptions
start the snapshot agent
start the distribution agent
Does this mean that it will only transfer the new 2 rows to replicate sites ? or will it drop everything from replicate site and apply all rows from primary site on to replicate.
Any help is appreciated
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Nov 29, 2006
Hello,
I have the following situation. I have a single publication on my publisher Server. This publication is created using SQL Server Manager. Snapshot is created completly. Now I want several Pull subscriptions from several machines to work with this publication (One subscription per machine). I'm creating these subscription using RMO. I'm synchronizing data using RMO again. My code workflow is:
Syncronize -> success -> do nothing
-> fail -> Check if everything with Publisher and Publication is ok -> Generate Snapshot -> Create Subsscription -> Sync again. (I tried to eliminate Generate Snapshot step but couldn't because I receive error that I must rerun Snapshot Generation.)
When I tested my code per single machine it's working. Next test I tried was to run my program on 2 machines simultaneously.
The result is:
---> System.Data.SqlClient.SqlException: Another snapshot agent for the subscription(s) is running or the server is working on a previous request by the same agent.
or:
---> System.Data.SqlClient.SqlException: Unable to acquire the replication merge administrative application lock for database 'XXX'. This could be due an active snapshot running while the schema change (DDL) or the administrative proc change was attempted.
Replication merge admin stored procedure 'sp_changemergepublication' failed for publication 'YYY'. This could be due an active snapshot running while the admin proc was called.
The problem is obvious but because I'm new to the replication I'm not sure if I did general mistake in what I want to achieve. Any advices how can I fix my problem will be highly appreciated.
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May 24, 2012
So, Microsoft decided that they were deprecating Transactional Replication with Updatable subscriptions. In that case, you have 2 options (if I am correct): Pay for Enterprise (if you are already not) and use peer-to-peer or use bidirectional transactional replication which is basically setting up a transactional from db1 to db2 and also transactional from db2 to db1.
The issue I see in both cases is conflict resolution. With updatable subscriptions, you could specify how to handle the conflict. With either of these 2 options (from what I can tell) you cannot allow the engine to handle this for you.
Any thoughts? Seems like a slap in the face to those who have been using MS for years and a damn good reason for companies that rely on updatable subscriptions to not upgrade to 2012.
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Jun 22, 2006
I am executing sp_dropmergesubscription, but the rows are still in dbo.msmerge_subscriptions, and are still shown in the replication monitor as expired; the last synch dates were in april (expiration is set to 10 days). The 'expired subscription clean up' job appears to be running okay. I need to remove these subscriptions from the publisher as the subscribers are mobile devices, which sometimes are lost.
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Mar 23, 2004
Hi all,
I'm admitedly a bit new to the world of replication, so please bear with me. I've got two SQL Server 2000 servers running in different locations. Server A does transactional replication over a push subscription to server B. If I need to make a minor change to one of the replicated tables (for example, dropping a no longer used column or changing a varchar field's length) do I need to drop the subscription, make the changes and then re-initialize the schemas and data?
For minor changes, I really hate having to knock out the site runnign off server B while the subscription is re-initialized and data is bulk copied back over. If I want to just make the changes manually on both servers will that cause problems down the line?
Any help is greatly appreciated.
tia.
-m
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Oct 28, 2006
Replication Type: Transactional With Updateable Subscriptions
SQL Server Version: SQL Server 2005 Enterprise Edition
Publisher, Subscriber1 and Subscriber2 all on same SQL Server
Problem: I am trying to set up a transactional replication with two updateable subscriptions. All three databases are a carbon copy of each other. Every table to be replicated contains an identity key column. I've been asked to create the replication without assigning separate identity ranges for the publisher and the updateable subscriptions. In other words they want a continous ID range. Can this be done without managing identity ranges programatically outside of SQL Server itself?
Example:
Publisher inserts into table test1 in database1. This creates ID 100 for the record. ID 100 replicates to Subscriber1 (database2) and Subscriber2 (database3).
Subscriber1 and 2 identity seeds are then incremented to ID 100. So far, all three databases have the same identity seed in table test1. Subscriber1 inserts into table test1 in database2. This creates ID 101 for the record. ID 101 is replicated to Subscriber2 (database3) and to the publisher (database1).
Subscriber2 identity seed is then incremented to ID 101. However, the Publisher retains it's original identity seed of 100.
Insert into Publisher table test1 will fail since it will try to insert the identity seed of 101 which is taken.
I have tried identity range management Automatic and Manual. Both seem to have some limitations in managing identity seeds unless different identity ranges are assigned for publisher and subscriber.
Can someone recommend a solution to this problem? Can this be done natively in SQL Server 2005 replication. Or can some recommend another approach to make this work?
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Mar 29, 2007
I set up a sql server 2005 database as publisher for about 50 sql mobile subscriptions. Yet in the replication monitor windows, it shows in subscription columns is 26549. Does it mean I have 26549 subsriptions or it means 26549 synchronizations?
thanks,
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Aug 30, 2007
Greetings:
I am working on a replication setup using transactional replication using with pull subscriptions and a separate distributor. The pull subscriptions are located on a SQL cluster using the virtual SQL Server name as the subscriber; when the box fails over, we get an error of missing replication.dlls. Researching further, we found that replication only works on one node of the subscriber.
Any ideas on what we did wrong in the setup?
Thanks,
Lee Everest
www.texas2oo.com/sqlblog
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Apr 3, 2007
Hello,
If I want to access or modify my local subscription data(not the configuration) how can I do that(from sql server 2005 or from asp.net)? Also can i update directly to the local subscriptions data or do I need another layer which will update from a table for example??
Thank you
Salah
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May 16, 2007
Greetings,
We periodically get the following message in our three server peer-to-peer transactional replication environment:
"One or more subscriptions have been marked inactive. Drop and re-create all subscriptions for this node that are failing with this error."
What causes a subscription to be marked inactive? What properties or settings can be adjusted to minimize or eliminate this occurrence?
Everthing seems to be running OK and then we get the message. It afflicts the higest change volume publication on our slowest overseas server.
Thanks,
BCB
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Jan 18, 2007
I doubt this is possible, but can someone think of a way to change the email address used for sending report subscriptions based on the report or subscription?
It's a need that I've heard from a number of different clients. Scenario: a company has one reporting services server with reports running from numerous departments. Report subscriptions are sent to internal and external email addresses and there's a business need to use different "from" addresses based on the report (or audience).
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Mar 26, 2007
Have 3 reports that runs using a shared schedule to generate historic snapshots. This has be working for months and months but out of nowhere it changed.
So now when ever the schedule runs it will generate the historic snapshot for 1 report but NOT the 2 remaining. As a strange twist the report that is successful changes from time to time...
SQL Server 2000, RS+SP2.
Any ideas?
Thanks
Regards
Jonas
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Jul 13, 2005
We will soon be going to a new ERP system using MS SQL 2000. I'm looking into possible backup strategies. The database size will be about 50 Gigs.
We have a SAN, which the new ERP system will be backed up on. I know a little about a SAN, but I need to make decisions about the types of backups to make. We can have 10 active snapshots, so I could use snapshots during the day as a point in time backup. I could also use the SAN snapshot instead of using a full backup. Would it be safe to use the SAN snapshots instead of the normal SQL Server backups? I’m not sure how long it will take to do a full SQL Server backup because the server is still in testing mode. I’m not getting the big picture about when to use snapshots and when to use regular SQL Server backups.
Is it possible in Windows 2000 Server to stop the transactions and flush the buffers for a few seconds to do a snapshot? From what I understand, the database could be left in a suspect state if you use snapshots to restore a database.
Thanks in advance for any help!
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May 16, 2008
I think I've read some conflicting advice in BOL. Maybe someone can clarify it for me.
Under "Database Mirroring and Database Snapshots" it says:
"You can take advantage of a mirror database that you are maintaining for availability purposes to offload reporting. To use a mirror database for reporting, you can create a database snapshots on the mirror database and direct client connection requests to the most recent snapshot"
To my mind, to enjoy a noteworthy performance gain, that mirror database would need to be on another server.
But then you read under "Database Snapshots":
"Multiple snapshots can exist on a source database and always reside on the same server instance as the database."
So how do you get the snapshot to the mirror?
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Nov 9, 2007
HiWhat would be the quickest way to create a backup and revert programon an sql (2000) database?- Can you create a transaction on a database, regardless of theconnections and thenrollback it all via an external program- Could you monitor the changes with profiler and then reverse those?- If desperate, could you backup the db from a tool and then restoreit? (too slow to be practical?)Not sure how to do this so any offers would be appreciatedta
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May 2, 2006
If multiple snapshots for the same report attempt to generate at the same second, is there something in place to prevent them from conflicting with each other?
Our SSRS 2005 application will use a console app that we are writing to change the default parameters on each report and call the CreateReportHistorySnapshot method. This application will be multi-threaded, so there is a possibility that multiple versions of the same report with different parameters will attempt to run at the same time. We need to be sure that these snapshots will not conflict and return the appropriate SnapshotHistoryID for that report run.
From looking at the History table in the ReportServer database it looks like there are uniqueIDs and other keys that would prevent duplicates, but what if the requests come in at the same time? Is SSRS 2005 smart enough to delay for a second so that there is not a duplicate? Since the way you reference these snapshots in your URL is with the Snapshot Time in UTC format, that only goes out to full seconds (2006-05-02T00:00:00).
Sorry for the length, but I could not think of how to condense this.
Thanks,
Steve
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May 13, 2008
Hopefully not too much of a stupid question.
At the moment, we are using SSRS to report off an Oracle database, if we take a snapshot of the data on the Oracle database and put it within SQL, will we expect an increase in performace/response.
And is it a good idea to keep the snapshot in the same place where SSRS is installed?
Thanks in advance.
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Mar 12, 2008
I want to share one of my doubt about SSRS and report server,
if i use snapshots or cache to my reports in report server, is it going to make increase in performance?
if it is going to make increase in performance,then SQLSERVER DATABASE is going to have any burdens,
means is it going to down the performance of Database?
Pls give me Responce to my Questions....
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Jun 15, 2007
Hi
I am creating a full Merge replication setup between two servers
Is there any way that I can set it up so that I do not have to create a snapshot.
Ie I would gurantee that the data and structutre is EXACTLY the same on both the subscriber and the publisher.
The problem is that my data base is over 4GB and it is quicker for me to get the data from one server to the other by doing a backup and restore.
I am using SQL 2005 with the latest SP
Cheers
Ants
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Apr 30, 2007
Does someone know if doing a reindex on a clustered or non-clustered index cause the snapshot file to grow? In other words, is the data that makes up the snapshot copied from the source to the snapshot database? If a normal reindex is done on the underlying database, will it block users from acessing the snapshot? Any help would be appreciated.
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Aug 7, 2006
Hi
I have setup my web synchronisation with very few problems until now. Initially I set the snapshots to generated by the subscriber when they first synchronise, this worked perfectly every time until a bottleneck occured after I reinitialised all the subscribers. When more than one subscriber then initialises the snapshot agent, the snapshot jobs fail because there is already a job running for user distributor_admin. The agent then retries etc, etc.. until all retries have failed. Ultimately only one of the snapshots is successfully created only after all other jobs have failed and run out of retries, it is then left alone to carry out its job.
Following this I made the decision to run with pre-generated snapshots instead so that I can schedule the server load and avoid these bottlenecks. Using the same publication I unchecked the option "Automatically define a partition and generate..." in the publication properties and proceeded to add each of the partitions specifying the correct "Host_Name()" value etc. After this I selected one partition and clicked "Generate the selected snapshots now". The snapshot was duly created but when synchronised the snapshot is not collected and used. Weirdly the merge porcess begins enumerating changes at the publisher followed by downloading 3100 chunks of data before receiving an error concerning the format of the message from the distributor.
If I check the option to allow auto generation, the synchronisation begins absolutely perfectly but only once it has generate a snapshot (Ignoring the one I created previously).
To add further weirdness, I created a small app which would generate the dynamic partitions using RMO. I used the sample code implicitly from BOL and it duly generated the dynamic snapshot job. I can then create a new Job class passing it the JobServer and JobName, it gives me the correct job but I cannot then call the Start() method because it keeps telling me the Job object is not created even though It is clearly enabled as a job in SSMS and can be right_clicked and started from there.
Even partition jobs created from within the SSMS appear as state "Creating" when I make an instance of it using the Job class.
What am I missing? Are my pre-generated snapshots not available to the subscriber because they seem to still be in the creating state? Is this a SQL Server configuration issue or have I setup the publication incorrectly?
Any help would be much appreciated.
Many thanks
Rab
P.S. Code snippet below
Imports Microsoft.SqlServer.Replication
Imports Microsoft.SqlServer.Management.smo
Imports Microsoft.SqlServer.Management.smo.agent
Imports Microsoft.SqlServer.Management.Common
Public Class frmSnapshot
Private Sub btnGenerate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGenerate.Click
Dim hostName As String = txtSiteID.Text.Trim
' Define the server, database, and publication names
Dim publisherName As String = "WDU340"
Dim publicationName As String = txtOrgID.Text.Trim
Dim publicationDbName As String = publicationName
Dim distributorName As String = publisherName
Dim publication As MergePublication
Dim partition As MergePartition
Dim snapshotAgentJob As MergeDynamicSnapshotJob = Nothing
Dim schedule As ReplicationAgentSchedule
' Create a connection to the Distributor to start the Snapshot Agent.
Dim distributorConn As ServerConnection = New ServerConnection(distributorName)
Try
' Connect to the Publisher.
distributorConn.Connect()
' Set the required properties for the publication.
publication = New MergePublication()
publication.ConnectionContext = distributorConn
publication.Name = publicationName
publication.DatabaseName = publicationDbName
' If we can't get the properties for this merge publication,
' then throw an application exception.
If (publication.LoadProperties() Or publication.SnapshotAvailable) Then
' Set a weekly schedule for the filtered data snapshot.
If RunJob(publication, snapshotAgentJob, distributorConn, hostName) = False Then
schedule = New ReplicationAgentSchedule()
schedule.FrequencyType = ScheduleFrequencyType.OnDemand
'schedule.FrequencyRecurrenceFactor = 1
'schedule.FrequencyInterval = Convert.ToInt32("0x001", 16)
' Set the value of Hostname that defines the data partition.
partition = New MergePartition()
partition.DynamicFilterHostName = hostName
snapshotAgentJob = New MergeDynamicSnapshotJob()
snapshotAgentJob.DynamicFilterHostName = hostName
' Create the partition for the publication with the defined schedule.
publication.AddMergePartition(partition)
publication.AddMergeDynamicSnapshotJobForLateBoundComClients(snapshotAgentJob, schedule)
RunJob(publication, snapshotAgentJob, distributorConn, hostName)
End If
Else
Throw New ApplicationException(String.Format( _
"Settings could not be retrieved for the publication, " + _
" or the initial snapshot has not been generated. " + _
"Ensure that the publication {0} exists on {1} and " + _
"that the Snapshot Agent has run successfully.", _
publicationName, publisherName))
End If
Catch ex As Exception
' Do error handling here.
MessageBox.Show(String.Format( _
"The partition for '{0}' in the {1} publication could not be created.", _
hostName, publicationName) & ": " & ex.Message)
Finally
If distributorConn.IsOpen Then
distributorConn.Disconnect()
End If
End Try
End Sub
Private Function RunJob(ByVal publication As MergePublication, ByVal snapshotAgentJob As MergeDynamicSnapshotJob, ByVal distributorConn As ServerConnection, ByVal hostName As String) As Boolean
Dim jobs As ArrayList
Dim iJob As Integer
Dim bExists As Boolean = False
jobs = publication.EnumMergeDynamicSnapshotJobs()
For iJob = 0 To jobs.Count - 1
snapshotAgentJob = DirectCast(jobs(iJob), MergeDynamicSnapshotJob)
If snapshotAgentJob.DynamicFilterHostName = hostName Then
'Run the Job
bExists = True
Dim server As New Server(distributorConn)
Dim job As New Job = (server.JobServer, snapshotAgentJob.Name)
MessageBox.Show(String.Format("About to run the dynamic snapshot job: {0} with status: {1}", job.Name, job.State.ToString))
Try
job.Start()
Catch ex As Exception
MessageBox.Show(ex.ToString)
Throw
End Try
Exit For
End If
Next
End Function
End Class
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Mar 28, 2007
I posted last year about getting and Expand All/Collapse All link working in reports, and it does work perfectly for on-demand reporting. I was able to get these working using the boolean report parameter and then the Jump to Report option going back to itself changing that parameter.
The issue that I have just discovered is that when a report with these Expand All/Collapse All links are in a report snapshot, clicking those links will cause it to re-render the report from the datasource at the time the link is clicked. This is an issue for one of the datasources we are using because the data is always changing, so when it goes back to re-render the counts and data returned are completely different then they were when the snapshot was first created. As time goes on the data will no longer even be in the datasource since it can only maintain 4 months of data.
Is there another way to get all detail groups to expand/collapse at once that does not require the report to be completely re-rendered from the datasource?
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Feb 2, 2007
I am using SQL2005 merge replication and have pull subscribers on a low bandwidth link
I am compressing the snapshot into an alternate folder. Files are not put into the default folder
When I start a synchronization, I would expect the cab file to be copied to the subscriber and then the files to be extracted locally at the subscriber in order to apply the snapshot
However, what appears to be happening is that the files are being extracted from the cab file on the publisher (in a UNC specified directory) and then copied in their uncompressed form to the subscriber - resulting in an extremely slow snapshot application.
Any ideas what I am doing wrong? I have read about the options for using FTP to transfer snapshot files, but I am not clear whether I have to use FTP in order to transmit a compressed snapshot. I don't want to use FTP unless I need to.
Any suggestions would be much appreciated
aero1
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Feb 12, 2007
Hi,
I'm developing a Data Mart and i'm experiencing a performance gap between my fact table and its snapshot.
I create snapshot with the istruction:
CREATE DATABASE DB_SNAP ON
( NAME = DB_SNAP_Data, FILENAME =
'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataDB_SNAP_Data.ss' )
AS SNAPSHOT OF DB;
And it works. But executing queries on the snapshot result very "low".
Can anyone tell me why?
Tanks.
F.
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Oct 17, 2007
Hi All..
I am trying to create daily automatic snapshots by using the code below...
Code Block
declare @MyDay varchar(20)
declare @query varchar(1000)
declare @DatabaseName varchar(128)
declare @snapshotName varchar(128)
declare @snapDataName varchar(128)
declare @snapFileName varchar(128)
declare @snapFilePath varchar(128)
set @Myday = (Select datename(weekday,getdate()))
print 'It is ' + @MyDay
Set @DatabaseName ='Cerritos_Net'
Set @SnapDataName='Cerritos_Net_Data'
Set @SnapshotName ='Cerritos_Net_Snapshot'+'_'+@MyDay
Set @SnapFilename ='E:ShareINCOMINGSnapshotsDailyCerritos_Net_Data'+'_'+@MyDay+'.ss'
Print 'Snapshot name is ' +@SnapshotName
select * from sys.databases where source_database_id =db_id(@databasename) and name = @SnapshotName
if @@rowcount <>0
begin
set @query = 'Drop database '+ @SnapshotName
print @query
exec(@query)
end
set @query ='Create database '+ @SnapshotName + ' on (Name = '''+@snapDataName +', FileName="'
+@SnapFilename +'") AS SNAPSHOT of '+ @databasename+';'
print @query
exec(@query)
But I keep getting this error
Code Block
It is Tuesday
Snapshot name is Cerritos_Net_Snapshot_Tuesday
(0 row(s) affected)
Create database Cerritos_Net_Snapshot_Tuesday on (Name = 'Cerritos_Net_Data, FileName="E:ShareINCOMINGSnapshotsDailyCerritos_Net_Data_Tuesday.ss") AS SNAPSHOT of Cerritos_Net;
Msg 105, Level 15, State 1, Line 1
Unclosed quotation mark after the character string 'Cerritos_Net_Data, FileName="E:ShareINCOMINGSnapshotsDailyCerritos_Net_Data_Tuesday.ss") AS SNAPSHOT of Cerritos_Net;'.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'Cerritos_Net_Data, FileName="E:ShareINCOMINGSnapshotsDailyCerritos_Net_Data_Tuesday.ss") AS SNAPSHOT of Cerritos_Net;'.
I think I placed my quotations right.....
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Jun 2, 2007
Hi All
We are running a Mirrored instance of SQL Server 2005 SP2 (in High
Performance mode) and using snapshots on the Mirror to provide a reporting
solution.
The problem is that quite frequently the Database Snapshot starts going
through a Recovery Process. This is causing large delays in the reporting
process.
The sequence of events in the SQL logs is
1. An Event for "Starting up Database Snapshotname"
2 A series of events "Analysis of Database Snapshotname is X% complete"
This can take up to 2 minutes
3. A series of events "Recovery of Database Snapshotname is X% complete"
This recovery process can take up to 1hr 45 minutes.
The database is running on new servers and there are no apparent disk
problems.
Can anybody advise on why a snapshot should start a recovery process
and how to prevent this
Regards
Patrick Flynn
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Feb 20, 2007
I have a database which contains more than a hundred publications and the clients need a snapshot for each one. Is there a way of automating this process of creating a snapshot? Like a job or something.
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Jun 19, 2007
Hello,
I would like to know what is the difference between a snapshot and a cached instance in SSRS?
Which one has the best performances and which one is the best for multiple users and reports containing parameters (the parameters are then passed in the where clause of the sql code; ex: WHERE IN(@param1))?
Thanks for your answers.
Zoz
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