Skip to main content

What is an Azure SQL Logic Server?

This is such a simple question that many times you realize that you do not have no idea about it.
What is an Azure SQL Logic Server Logic? Do I pay for it? Do I share resources between databases inside the Server?

What is an Azure SQL  Logic Server?
Is just a logical grouping of multiple Azure SQL Databases under the same logic server, The server it’s virtual and you do not share any resources cross databases that are deployed under it.
You will share the Server Admin username and password and the name of the server when you want to connect to multiple databases that are under the same Azure SQL  Logic Server.

Do I pay for it?
Know, because behind the science there is no computation allocated to it. For each database that you create under the server, you will specify the tier (size). That is the cost driver for you in the end. Having for example 2 Azure SQL Databases under the same Azure SQL  Logic Server will generate you costs for each database.

Do I share resources between these two databases?
No, the computation and storage resources are not shared. The only things that you share are the ‘master’ users and the DNS name of the database server. Beside this, you also share the master database. This might affect the performance when:

  • Interrogate the master database for scenarios when the number of the databases is close the maximum limit
  • Execute queries against sys.resource_stats (resource utilization)
  • Portal action related to database enumeration 

Things like Firewall, backup retention and access control are managed at Azure Server level.


What are the quotas of Azure SQL (Logic) Server?
The default number of Azure SQL Servers inside an Azure Subscription is 21 and the maximum number of Azure SQL Databases per server is 5.000 (crazy… right?). The maximum number of DTUs per server is 54.000 DTUs.

Comments

Popular posts from this blog

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

Fundamental Books of a Software Engineer (version 2018)

More then six years ago I wrote a blog post about fundamental books that any software engineer (developer) should read. Now it is an excellent time to update this list with new entries.

There are 5 different categories of books, that represent the recommended path. For example, you start with Coding books, after that, you read books about Programming, Design and so on.
There are some books about C++ that I recommend not because you shall know C++, only because the concepts that you can learn from it.

Coding

Writing solid codeCode completeProgramming Pearls, more programming pearls(recommended)[NEW] Introduction to Algorithms

Programming

Refactoring (M. Fowler)Pragmatic ProgrammerClean code[NEW] Software Engineering: A Practitioner's Approach[NEW] The Mythical Man-Month[NEW] The Art of Computer Programming

Design

Applying UML and Patterns (GRASP patterns)C++ coding standards (Sutter, Alexandrescu)The C++ programming language (Stroustrup, Part IV)Object-oriented programming (Peter Coad)P…