Big Data
what is big data
collection of data sets so large and complex that it becomes difficult to process using traditional data processing applications
Data model
then
few companies were generating data and all others were consuming
now
all of us are generating data and all of us are consuming
data types
structural data
unstructural data
semi structural data
big data analytics
big data analytics is the process of examining large datasets to uncover hidden patterns, unknown correlations, market trends, customer preferences and other useful business information
NOSQL
why we move into NOSQL
scalability
SQL vs NOSQL
SQL
SQL stands for structured query language
SQL lets you access and manipulate databases
SQL is an ANSI standard
NOSQL
stands for Not Only SQL
class of non-relational data storage systems
usually do not require a fixed table schema nor do they use the concept of joins
all NOSQL offerings relax one or more of the ACID properties
NOSQL characteristic
open-source
non-relational
schema-less
cluster friendly
CAP vs ACID theorem
ACID
Atomicity
Consistency
Isolation
Durability
CAP
Consistency
Availability
Partition tolerence
NOSQL database Types
document
column-family
graph
key-value
