Time to move on

It’s almost a year since I started blogging here on WordPress. I justed wanted to see if this blogging thingy was something for me and hey I like it. From the start I was asked if I was interested to join LessThanDot and now after I year I feel ready for it. This means that I will not write any technical content anymore on this blog and that I will not monitor it anymore. If you want to see more posts of me just follow me to my LessThanDot page.

Hope to see you there

Axel

Putting Books Online Offline

One of the early announces of MS SQL Server 2012 I remember is that Books Online (BOL) would only be available online. And of course it makes sense. If the SQL Server team wants to keep the library up to date it makes no sense shipping it with the install media. But as a consultant I need BOL to be installed on my personal laptop because it often happens that I’m not allowed on the customers network with an external machine. So no network, means no internet and means no Books Online. But lucky me it’s easy to have BOL offline available.
This is how it works.
Open Management Studio and click Help > Manage Help Settings

In the Help Library Manager click Install content from online

Scroll down in the Install Content from Online screen to the SQL Server 2012 section and click Add in the Actions column. Add additional content if desired and click update.

After a couple of minutes Books Online is offline available.

Interupted Identity Insert behaviour

While teaching the Implementing & maintaining a Microsoft SQL Server 2008 Fasttrack I got a very simple question. But it’s often these simple questions that make you doubt. The question was: “What if you manually insert some values in an Identity column? Will SQL Server autonumber from the new values or…”. I never had to worry on production servers about this and I was pretty sure SQL Server would be able to cope with manual Identity Inserts but I don’t want to give answers to my students that I’m not sure off. So it was demo time:

First of all a table with an Identity column was created:

CREATE TABLEIdentityTest (
Autoseed int IDENTITY (1,1),
Comment varchar (20)
)
GO

Next I insert some rows that automatically get a value in the Autoseed column:

INSERT INTO IdentityTest
VALUES (‘autoinsert’)
GO 75

If I try to insert some values in the autoinsert column I get an error message:

INSERT INTO IdentityTest(Autoseed,Comment)
VALUES (76,’manual’),(77,’manual’)
GO

Msg 544, Level 16, State 1, Line 1
Cannot insert explicit value for identity column in table ‘IdentityTest’ when IDENTITY_INSERT is set to OFF.

 To insert some values manually I need to enable Identity inserts on the table with the following statement:

SET IDENTITY_INSERT IdentityTest ON
GO

Now I can do the insert. Note that when doing an Identity insert I need to specify the columnlist so this will work:

INSERT INTO IdentityTest(Autoseed,Comment)
VALUES (76,’manual’),(77,’manual’)
GO

But this will not work:

INSERT INTO IdentityTest
VALUES (76,’manual’),(77,’manual’)
GO

EXTRA TIP:
Dragging the column folder from object explorer to the Query window will automatically give the columnlist of the table.

Now I have two manual lines in my table. To continue my demo I need to put the auto seed back on:

SET IDENTITY_INSERT IdentityTest OFF
GO

To make it even more complicated I also delete some rows in the table to create some gaps:

DELETE FROM IdentityTest
WHERE Autoseed IN (69,77)

Now it’s time to add some rows. Note that 77 was the highest inserted number but was deleted in the previous script.:

INSERT INTO IdentityTest  VALUES (‘autoinsert’)
GO 10

Now querying the table will give the following results:

SELECT MAX(autoseed)
FROM IdentityTest

Results in 87 so the auto increment started at 78 meaning tot 77 was not reused although it was deleted

SELECT * from IdentityTest
WHERE Autoseed IN (69,77)

Will give no results so the empty gaps are not filled up again.

SELECT * FROM IdentityTest

Shows what happens on heaps (tables with no clustered index). Value 78 will be on position 69 because it will fill the physical gap on the datapage.

Why Change Management

My entire career I have been working as an external IT’er for lot’s of companies and they all had their specific view on Change Management. Comparing them I can categorize them in 4 types:

Type 1: Change ManageWhat?

This is the typical approach in the smaller companies. The changes are not managed at all not that they don’t want to but don’t have the people, the budget, the know-how, the will… to do this. So changes are not managed and in most cases not even tested. The (not so) funny part is that in most of these kind of companies I was hired because something was going wrong and they had no clue where to start looking or how to start solving the issues.

Type 2: Change Management, Yes we have to!

It has to be something Belgian, we just tend to dislike rules and procedures so if some external organisation obliges us to have a Change Management procedure, we’ll have one but… the changes are not really managed. I saw companies where approvals where already given to proceed to the next step before there was an approval from the test team, changes approved before the developers finished coding and all kinds of exceptions to the procedure so that the change process had a minimal impact on the development teams. The only reason I found for these companies to have change management is that they needed to document every change because of ISO or SOx compliance.

Type 3: Change Management = Cost Management

When working with smaller IT-teams where people can wear different hats (fire brigade, architect, designer, implementor…) it’s different to manage the costs and resources. In most cases the original tasks of these teams is to support the IT environment. But after time goes by the rest op the company will start thinking that maintaining, upgrading, adapting, replacing… is also normal support from the IT department. But all these tasks are not foreseen in the budget, even worse if you let the business free, they’ll expect that the IT-department also pays for extra hardware en licensing costs. So starting up a basic Change Management procedure can help manage the cost. From the moment a request is not in the task list of the support-team it will be categorized as a Request For Change that needs an approval from the IT-manager. And after that it’s up to him/her to discuss with the other business unit managers from wich budget the change will be paid.

Type 4: Change Management to manage the changes

If this is the reason why a company starts with Change Management, there is a great chance that they will succeed to create a decent procedure. Saying we want to manage our changes is saying we want to know why, when, what… without saying we want to start a bureaucracy to discourage changes and improvement of the company. They will also keep changing and improving the Change Management process itself. Resulting in a stable and cost-efficient it-environment.

Conclusion

For me the most relaxed way of working is in Type 4 environments. You know what is expected from you and you know that the things you need to do are tested so the risk of problems when executing the change is relatively small. Type 3 can be the first steps to full Change Management and will already be a relieve for the people in the IT-department when their Change tasks will be planned. Type 1 and 2 are, for me, almost equal to each other only nr 2 takes more effort because of the paper work and because there are names in the documents there might be a chance that some real testing was done.

Book review: Microsoft SQL Server 2008 Administration with Windows PowerShell

Almost every training I teach I get the question: “What with PowerShell?”. Students want to know what they can do with PowerShell, how it’s used and most important where they can learn it. I learned the PowerShell (very) basics from articles on the internet, demo’s on events and so on. But now I think a found a winner for DBA’s who want to start learning PowerShell. The Microsoft SQL Server 2008 Administration with Windows PowerShell book by Ananthakumar Muthusamy (blog) and Yan Pan (blog) is a perfect guide for DBA’s who start with PowerShell or who already know PowerShell but want to use it to administer their MS SQL Servers. Also beginning DBA’s can start using the book because it’s full of tips, tricks and explanations on how and why certain tasks are done.

The first 4 chapters bring the PowerShell ‘dummy’ up to speed with the very basics of PowerShell. Readers will learn how to use commands, create scripts and work with Functions, Parameters and so on. Extensive code examples help to master the basics fast.

In chapter 5 to 8 the writers dig in deeper on the use of PowerShell and how to get information and to get things done on Windows level, covering the File System, Registry, Event Logs, Services and the WMI Provider

And finally starting from chapter 9 to 13 the reader starts reading what a DBA can do with Windows PowerShell starting with the provider for Configuration Management over the SQL Server PowerShell provider, policies and the SMO.

After these chapters the book could have stopped. Everything about PowerShell and SQL Server is covered to get a DBA started but the real surplus of the book is about to start. First chapter 14 is there to advise on using and creating standards within SQL Server and PowerShell. Nothing new, nothing spectacular but it’s nice to see the writers care about standards and want to help and guide beginning coders to use them.

Starting from chapter 15 to 21 all the knowledge of the previous chapters is put into practise. The chapters are no easy read but show the readers how to create a complete PowerShell solution to inventory, monitor and manage a complete SQL Server environment. And even if the reader doesn’t want to create such a solution. The coding examples are just great to lookup how a certain task can be accomplished with PowerShell.

Conclusion

Microsoft SQL Server 2008 Administration with Windows Powershell is not a book to read on a holiday nor in bed. But I think it’s a must have on every DBA’s bookshelf whether the DBA is a starter or a senior. Everybody will find value in this book.

SQL 2008 R2 upgrade error: Wait on the Database Engine recovery handle failed

While preparing for an upgrade of a complex SQL Server 2000 installation to SQL Server 2008 R2 I had to figure out a way of reusing the MSDB database of the original SQL Server 2000 installation on the new SQL Server 2008 R2 setup. The reason is the third-party job scheduling tool refers to the jobs with their job_id and neither scripting the jobs or using the SSIS ‘Transfer Jobs Task’ gave me the possibility to keep the job_id. The easiest way to accomplish this is:

  • Backup the original SQL Server 2000 MSDB database
  • Restore the SQL Server 2000 MSDB database on a temporary SQL Server 2000 with the same patch level as the original
  • Do an in place upgrade of the tempory SQL Server 2000 instance to SQL Server 2008 R2
  • Backup the upgraded SQL Server 2008 R2 MSDB database
  • Restore the upgrade SQL Server 2008 R2 database on the newly installed SQL Server 2008 R2 server

Unfortunately trying out this approach I stumbled upon the following error during the in place upgrade from SQL Server 2000 to SQL Server 2008:

 The SQL Server error log during setup is stored in ‘%programfiles\Microsoft SQL Server\100\Setup Bootstrap\Log’. In this folder a ‘Summary.txt’ is found with the summary of the last install attempt. Looking in the newest sub folder more detailed log files are found. Opening the ‘SQLServer_ERRORLOG_somedatetime.txt’ and scrolling down gave me this error:

The database owner SID recorded in the master database differs from the database owner SID recorded in database ‘msdb’. You should correct this situation by resetting the owner of database ‘msdb’ using the ALTER AUTHORIZATION statement.

 And off course, since the msdb database is owned by the SQL Login ‘sa’ the SID of the ‘sa’ account on the originating server is not the same as the SID of the ‘sa’ account on the upgrade server. To correct the situation and let the upgrade continue I ran the following commands from a command prompt:

Stop the running SQL Server Service:

net stop mssqlserver

Start the SQL Server services with these trace flags so the upgrade scripts don’t start running again:

net start mssqlserver /f /T3608

Use a dedicated admin connection to connect to the SQL Server Instance and change the owner of the MSDB database back to the ‘sa’ login:

sqlcmd -E -A
USE msdb
GO
sp_changedbowner ‘sa’
GO
EXIT

Use the net stop mssqlserver command again to stop the SQL Server Service.

Now I can restart the setup program of SQL Server 2008 R2 but instead of choosing a new installation I need to choose to REPAIR my latest installation. After the repair finishes I finally have my upgraded MSDB database. And when restoring the database to my target server I must keep in mind to change the owner of the restored MSDB database to the ‘sa’ login of the new server.

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