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

IoT Technology

-
Image
IoT technology The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines.  IoT is a network of sensors where data is exchanged, using different connectivity protocols, with systems. This set up can be leveraged to create a new business application or to enhance an existing process. The exchange of the data can be bi-directional between sensors and systems Examples of sensors can be temperature sensors, motion sensors, flow meters, heart meter monitors, biometric devices, smoke detectors, & etc Examples of connectivity can be wifi, radio, GPRS, GSM, LAN, WAN, & etc. Examples of systems can be a remote health monitoring applications, SCADA applications, etc Look at next slide about the complete flow of IoT process Examples A doctor in US would like to monitor the heart rate and ECG of a patient in Hyderabad. This is done with the patient having sensors attached to him that collect the ECG data and the heart r
Read more

What is reverse proxy?

-
Image
  What is a reverse proxy? A reverse proxy is a server that sits in front of web servers and forwards client (e.g. web browser) requests to those web servers. Reverse proxies are typically implemented to help increase  security ,  performance , and reliability . In order to better understand how a reverse proxy works and the benefits it can provide, let’s first define what a proxy server is. What’s a proxy server? A forward proxy, often called a proxy, proxy server, or web proxy, is a server that sits in front of a group of client machines. When those computers make requests to sites and services on the Internet, the proxy server intercepts those requests and then communicates with web servers on behalf of those clients, like a middleman. For example, let’s name 3 computers involved in a typical forward proxy communication: A: This is a user’s home computer B: This is a forward proxy server C: This is a website’s origin server (where the website data is stored) In a standard Internet c
Read more