Azure : Exporting Resource Groups *NEW*

Introduction

This is a request that has been posed A LOT in the past… Being able to export your configurations in order to “replay” them. And during build, an announcement was made that the 1.3.0 release of Azure Powershell had a feature we were craving for!

2016-04-04 08_32_48-Releases · Azure_azure-powershell

Continue reading “Azure : Exporting Resource Groups *NEW*”

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Azure : MSSQL – Impact of parameters on Backup Performance

A while ago we experienced an issue with slow backup performance on an Azure VM. In light of the experience we had on that case, I went into my lab environment to test the impact of different parameters…

What is the test environment we’ll be using?

  • Virtual Machine : D2
  • Storage : Z-drive, based upon storage spaces, with one disk (100GB / LRS / Standard)
  • Paths : SQL Binaries, Data & Log files on Z-drive. Backup destination used was the temporary drive (D).
  • Database : AdventureWorks increased several times up till 1,5GB (using a set of SQL commands by Jonathan Kehayias), compared to the 250MB.

 

Test Run A
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH NOFORMAT, NOINIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, NOREWIND, NOUNLOAD, STATS = 10

Result

Processed 192888 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 405530 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 598418 pages in 211.441 seconds (22.110 MB/sec).

Comment

We started out using a basic backup command… Nothing fancy, and we got 22MB/s, so not that great either.

 

Test Run B
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10

Result

Processed 192888 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 405535 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 598423 pages in 152.066 seconds (30.744 MB/sec).

Comment

Now we added compression, and the backup command went up by 50%.

 

Test Run C
Command

BACKUP DATABASE [AdventureWorks2012original]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10

Result

Processed 24192 pages for database ‘AdventureWorks2012original’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 2 pages for database ‘AdventureWorks2012original’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 24194 pages in 6.776 seconds (27.894 MB/sec).

Comment

Running the same command on the original (smaller) database had a performance that was a tad slower.

 

Test Run D
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10, BLOCKSIZE = 65536, MAXTRANSFERSIZE=2097152

Result

Processed 192888 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 405539 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 598427 pages in 119.499 seconds (39.123 MB/sec).

Comment

Now we’ll add a fixed block size and max transfer size. Be aware that the blocksize is 65k for tape devices and 512 for anything else. So we’ll beefed that up and got a bit less than double from where we started.

 

Test Run E
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10,BUFFERCOUNT = 20, BLOCKSIZE = 65536, ,MAXTRANSFERSIZE=2097152

Result

Processed 192888 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 405546 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 598434 pages in 100.559 seconds (46.492 MB/sec).

Comment

Now we’ll add a buffer count and things heat up even more.

 

Test Run F
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10,BUFFERCOUNT = 100, BLOCKSIZE = 65536, MAXTRANSFERSIZE=2097152

Result

Processed 192888 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 405550 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 598438 pages in 97.435 seconds (47.983 MB/sec).

Comment

And let’s pump up the buffer count… a tad better.

 

Test Run G
Command

BACKUP DATABASE [AdventureWorks2012original]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10, BUFFERCOUNT = 100, BLOCKSIZE = 65536, MAXTRANSFERSIZE=2097152

Result

Processed 24192 pages for database ‘AdventureWorks2012original’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 3 pages for database ‘AdventureWorks2012original’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 24195 pages in 4.437 seconds (42.600 MB/sec).

Comment

Doing the same with the smaller database gives us a lower performance.

 

Test Run H
Command

BACKUP DATABASE [AdventureWorks2012]
TO DISK = N’d:\Backup\Test.bak’ WITH INIT,
NAME = N’HC_TST-Full Database Backup’, SKIP, COMPRESSION, NOREWIND, NOUNLOAD, STATS = 10, BUFFERCOUNT = 100, BLOCKSIZE = 65536, MAXTRANSFERSIZE=2097152

Result

Processed 648352 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Data’ on file 1.
Processed 1592447 pages for database ‘AdventureWorks2012’, file ‘AdventureWorks2012_Log’ on file 1.
BACKUP DATABASE successfully processed 2240799 pages in 260.300 seconds (67.254 MB/sec).

Comment

I ran the “increase” script a few more time to have a database from about 5.2GB. The performance is better than the two other smaller ones.

Conclusion

  • Parameters : Choosing your parameters matters A LOT. We had a case that went from 9MB/s to 90MB/s by using the same set of parameters as above…
  • Database Size : There is a ramp up time involved… Small databases experience a penalty due to this.
  • Design : Be aware of your disk subsystem design. Using one standard disk will provide you with 500 IOPS/s. If you use this disk for both source & target, then you don’t need to be a professor to know that this won’t yield a big performance.

Azure : Direct SQL Server to Storage Account Backup

Introduction
Did you know you can back up (and restore) your SQL data to (and from) your Azure Storage Account? No… Check out the following article ; SQL Server Backup to URL

IC639738.jpeg

How does that look in reality?
Browse to your storage account and click on “Manage Access Keys”…
2015-09-04 10_30_23-Storage - Microsoft Azure

Copy the “Primary Access Key” to your clipboard…
2015-09-04 10_30_56-Storage - Microsoft Azure

Now head over to your SQL Management studio and create the following credential…

CREATE CREDENTIAL [https://kvaestest01.blob.core.windows.net/sqlbackup] WITH IDENTITY='kvaestest01', SECRET='Dnwkn...SydB...gfsZjm...TJ9Ew=='

  • Credential Name : The url of your backup location
  • Identity : The name of your storage account
  • Secret : The primary access key

And you will see it pop up in your objects…

2015-09-04 10_31_29-kvaestest01-6 - kvaestest.cloudapp.net_55099 - Remote Desktop Connection

Now we are ready for the action!

BACKUP DATABASE AdventureWorks2012 TO
URL = 'https://kvaestest01.blob.core.windows.net/sqlbackup/AV2012_01.bak'
WITH CREDENTIAL = 'https://kvaestest01.blob.core.windows.net/sqlbackup'
,COMPRESSION
,STATS = 5;
GO

One thing to note. You can only use one URL in your backup command. So multiple backup files for concurrency reasons is sadly not possible.

Have fun!