Skip to main content

Salvaging MDW on SQL Server 2008




Last week I had the opportunity in attempting to salvage a MDW configuration.
As at the time of compiling this  it was still not working ; I’m hoping it a stone through away from getting the collections running.

The client had setup the MDW and found it was collecting far too much data as part of the default collections and wanted it stopped. And as you know there is no Microsoft documented way of uninstalling the MDW.  However, Aaron has a good article with disclaimer ridden code offered at http://www.mssqltips.com/sqlservertip/2473/removing-the-sql-server-management-data-warehouse/. With my limited experience with the code and testing, I’d say it is very close to safe as long as you don’t drop any of the schedules.

FYI -  If MDW is ever re-enabled the CollectorSchedule_Every_15min , CollectorSchedule_Every_6h schedules needs to exists for three of the data collection to be reinitiated.

Unfortunately the client seem to have gone the extra step and deleted data from three of the system collection tables (syscollector_collection_sets_internal ,syscollector_collection_items_internal).

At the moment, I have managed to identify the missing records and relationships; and inserted the data to the system tables. Which has made things much more better than not having any error messages popping up from the MDW UI. I’m hoping and praying that Bill Ramos will have some time to respond to get this done and dusted.

FYI – From the testing I carried out, I did realise that all the GUID’s in the system tables are consistent and shouldn’t make a different if you copied them over to another environment.

Comments

Post a Comment

Popular posts from this blog

How To Execute A SQL Job Remotely

One of the clients needed its users to remotely execute a SQL job and as usual I picked this up hoping for a quick brownie point. Sure enough there was a catch and there was something to learn. Executing the job through SQLCMD was a no-brainer but getting it to execute on the remote machine was bit of challenge. On the coding Front 1    1.)     The bat file included the following code                 SQLCMD -S "[ServerName] " -E -Q "EXEC MSDB.dbo.sp_start_job @Job_Name = ' '[JobName]" 2    2.)     The Individual users were given minimum permissions  to execute the SQL job Ex. use msdb EXECUTE sp_addrolemember @rolename = 'SQLAgentOperatorRole', @membername = ' Domain\UserLogin ' At the client machine              This took a fair bit of time till our sysadmin got me an empty VM machine....
Post a Comment
Read more

Create a dacpac To Compare Schema Differences

It's been some time since i added anything to the blog and a lot has happened in the last few months. I have run into many number of challenging stuff at Xero and spread my self to learn new things. As a start i want to share a situation where I used a dacpac to compare the differences of a database schema's. - This involves of creating the two dacpacs for the different databases - Comparing the two dacpacs and generating a report to know the exact differences - Generate a script that would have all the changes How to generate a dacbpac The easiest way to create a dacpac for a database is through management studio ( right click on the databae --> task --> Extract data-tier-application). This will work under most cases but will error out when the database has difffrent settings. ie. if CDC is enabled To work around this blocker, you need to use command line to send the extra parameters. Bellow is the command used to generate the dacpac. "%ProgramFiles...
10 comments
Read more

High Watermarks For Incremental Models in dbt

The last few months it’s all been dbt. Dbt is a transform and load tool which is provided by fishtown analytics. For those that have created incremental models in dbt would have found the simplicity and easiness of how it drives the workload. Depending on the target datastore, the incremental model workload implementation changes. But all that said, the question is, should the incremental model use high-watermark as part of the implementation. How incremental models work behind the scenes is the best place to start this investigation. And when it’s not obvious, the next best place is to investigate the log after an test incremental model execution and find the implementation. Following are the internal steps followed for a datastore that does not support the merge statements. This was observed in the dbt log. - As the first step, It will copy all the data to a temp table generated from the incremental execution. - It will then delete all the data from the base table th...
4 comments
Read more