ESRI FeatureClass vs Feature Layer

Feature Layer: A layer that references a set of feature data. Feature data represents geographic entities as points, lines, and polygons.

Feature Class:In ArcGIS, a collection of geographic features with the same geometry type (such as point, line, or polygon), the same attributes, and the same spatial reference. Feature classes can be stored in geodatabases, shapefiles, coverages, or other data formats. Feature classes allow homogeneous features to be grouped into a single unit for data storage purposes. For example, highways, primary roads, and secondary roads can be grouped into a line feature class named "roads." In a geodatabase, feature classes can also store annotation and dimensions.

Rasterized Feature Layer: A feature layer in ArcGlobe that exists as points, lines and polygons but is rendered as cell data. When layers are added to ArcGlobe, they may automatically be rendered in raster format to retain their cartographic symbology.

Read More

Register Database to ArcGIS server

There are two methods to register Database to ArcGIS Server
A) Register via ArcGIS Desktop

• Double click to ensure ArcGIS Server Instance is connected to ArcGIS Desktop
• Right Click to Publisher connection to ArcGIS Server
• Then Click ArcGIS Server Properties to open ArcGIS Server Properies
• Add Data Store in Registered Databases

ESRI Video on Registering database data with ArcGIS 10.1 for Server

B) Register via ArcGIS Server Manager Web Interface

SOURCE: http://gisdeveloper.blogspot.com/2014_04_01_archive.html ( Copied here for my future reference)
REGISTER DATABASE TO ARCGIS SERVER

While publishing data (from database) to ArcGIS server it gives you a warning that

24011: Data source is not registered with the server and data will be copied to the server

How to resolve this ??

Well there are different approaches, here is the one which i followed. But before doing anything Please Note:
Note: The client side libraries need to be copied to ArcGIS server's bin folder. What does this mean ??
Well you have to copy the libraries (obtained from esri's customer portal Or simply google it "PostgreSQLClientLibs922" Or PostgreSQL libraries for ArcGIS server)
Copy the correct version of libraries to
C:\Program Files\ArcGIS\Server\bin   

Note to see the correct version of libraries click here.

Now,

• Open ArcGIS server Manager from (prefer Internet Explorer)http://localhost:6080/arcgis/manager/site.html
• Sign in to your ArcGIS server account
• On home Page under Directories tab click on Data Store
• Click on Registered Database

Read More

Postgresql tips

Start to postgresql :  sudo -u postgres psql postgres

List all databases : 

• \list or \l: list all databases
• \dt: list all tables in the current database

Type \q and then press ENTER to quit psql
Connect to database : \connect database_name
Drop all tables from a database:  drop schema public cascade;

Read More