Difference between Amazon CloudSearch and Amazon SimpleDB

1. Amazon CloudSearch :
It is a scalable cloud-based search service that forms part of Amazon Web Services. It is a hosted search engine service by Amazon with the data stored in the Amazon cloud. This Database supports 34 languages and its features are as follows highlighting, autocomplete, and geospatial search.

2. Amazon SimpleDB :
It is a hosted simple database service by Amazon, with the data stored in the Amazon Cloud. It is Amazon is a web service for running queries on structured data in real-time. This database is written in Erlang by Amazon.com. It has the following features – high availability and flexibility, with little or no administrative burden.

Difference between Amazon CloudSearch and Amazon SimpleDB :

S.NO.	Amazon CloudSearch	Amazon SimpleDB
1.	Developed By Amazon in 2012.	Developed By Amazon in 2007.
2.	It is a hosted search engine service by Amazon with data stored in Amazon cloud.	It is a hosted simple database service by Amazon, with data stored in Amazon Cloud.
3.	It supports replication methods that are managed transparently by AWS.	It supports replication methods.
4.	It supports partitioning methods.	It does not support partitioning methods.
5.	Its Primary database model is a Search engine.	Its primary database model is the Key-value store.
6.	It supports predefined data types such as float or date.	It does not support predefined data types such as float or date.
7.	No Methods to ensure consistency in a distributed system.	Eventual Consistency and Immediate Consistency is used to ensure consistency in a distributed system.
8.	Replication methods are managed transparently by AWS support.	The replication method is not managed by any support.
9.	It supports Data scheme.	It supports schema-free Data scheme.