What is Contained DataBase?

-

SQL Server 2012 Onwards we have a new solution termed as contained database. Contained database is defined as a database which has the database user without logins. It includes all settings related to databases along with its metadata, thus system will be having no dependency with SQL server login. Users can easily connect to a contained database without having to go through the log in at DB engine.

Contained database feature provides two containment modes:

  • None – By default each database has its mode set as NONE. This means there is no contained database feature being used.
  • Partial – With partially contained databases, we can define boundaries between databases and the server, so the metadata will exist inside the databases. It makes SQL Server databases more portable and less dependent on underlying hosts. 

A contained database is a database that is isolated from other databases and from the instance of SQL Server that hosts the database

  • Isolated from other databases
  • Isolated from SQL Server instance
  • No Login needed

Applications can access the database independent of the sql server instance information

SQL Server needs to be configured before you can create contained databases

Database needs to be configured to be a contained database


Contained database is not fully featured DB and it is a partial because it doesn't have sql server instance principles as like the normal instance

but contained database dose not share anything it is always can found in contained db. it doesn't have login and if any db have login then it is fully covered features

A fully contained database includes all the settings and metadata required to define the database and has no configuration dependencies on the instance of the SQL Server Database Engine where the database is installed

Benefits

One of the problems that occurs when moving databases, is that some important information can be unavailable when a database is moved from one instance to another. 

For example, login information is stored within the instance instead of in the database. When you move a non-contained database from one instance to another instance of SQL Server, 

this information is left behind. You must identify the missing information and move it with your database to the new instance of SQL Server. This process can be difficult and time-consuming

Limitations

Partially contained databases do not allow the following features.

Replication, change data capture, or change tracking.

Numbered procedures

Schema-bound objects that depend on built-in functions with collation changes

Binding change resulting from collation changes, including references to objects, columns, symbols, or types.

Comments

Post a Comment

Popular posts from this blog

Email Sending through O365 using OAuth Protocol

-
  Microsoft Office365 EWS servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application Microsoft / Office 365 OAuth + EWS We can use the OAuth authentication service provided by Azure Active Directory to enable our application to connect with IMAP, POP or SMTP protocols to access Exchange Online in Office 365. To use OAuth with our application we need to register application on Azure Active directory and other steps also we need to do to get the access token back. Below are the steps   To use Microsoft/Office365 OAUTH in your application, you must create an application in  https://portal.azure.com . Sign into the Azure portal using either a work or school account or a personal Microsoft account. If your account gives you access to more than one tenant, select your account in the top right corn
Read more

IISRESET vs App Pool Recycling ?

-
Image
 I think most IIS administrators know IISRESET command, and why they use it. One of possible reasons can be to restart IIS services to initialize web applications, or to apply some changes of applications & IIS settings .There’re just a few conditions those need your IISRESET command. In most situations, you don’t need this. I have a concern if you always run this command for applying any changes, or release system resource – memory – regularly, or frequently. Because it’s much more cost than what you really need to take – there’re side effects Recycling App Pool’ has been introduced from IIS6 in Windows2003. It’s designed to restart only application pools(=worker processes). It can be done in a command prompt(run ‘IISAPP /?’ in a command prompt for details), as well as in the IIS manager What IISRESET does? When you run IISRESET, many things will happen. In order to understand them, I think I need to show you how IIS looks like – about IIS core components. The below shows you role
Read more

Deploy .Net6.0 Web api with docker

-
Image
  What is Docker? Docker is a containerization platform, meaning that it enables you to package your applications into images and run them as “containers” on any platform that can run Docker. It negates the classic: “It works on my computer” argument as Docker images contain everything needed for the app to run. Are Containers the same as Virtual Machines? They are similar, but not the same. In short: Virtual Machines provide OS Level Virtualization Containers provide App Level Virtualization This concept is depicted below: Why Would You Use it? In short you would use Docker, (and hence containers), for the following reasons: Portability.  As containers are self- contained  they can run on any platform that runs Docker, making them easy to stand up and run on a wide variety of platforms. Scalability.  With the use of additional “orchestration” you can spin up multiple container instances to support increased load. Performance.  Containers generally perform better than their VM counterp
Read more