best online cassandra PDF file free

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cassandra TRAINING At Global Online Trainings
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Global Online Trainings
To give an overview Global Online Training
services corporation specializing in providing
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enterprises. Our high quality, competitive and
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this field. Our professional team carries
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Cassandra Training Introduction
Apache Cassandra is a free and open source
Database, and it belongs to category of NoSQL
database like MongoDB, Amazon DynamoDB. The
difference between Apache Cassandra and MongoDB
is based on JSON document and then Apache
Cassandra is based on key value pairs. Apache
Cassandra also provides a high availability with
no single point of failure. It has a master
less replication meaning there is no master-slave
replication with Apache Cassandra. So any number
of nodes together can form a master less
replication with Apache Cassandra. It is
initially developed and it is a child of BigTable
and dynamoDB , So the combination or the features
or the good features of both BigTable and
dynamoDB are adopted and implementation with
Apache Cassandra. Cassandra was started in 2008
at Facebook and became an Apache Project in 2014
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• Overview of Cassandra Training

• It have multiple nodes connected together to form
  a cluster and each node within the cluster would
  have connectivity between other nodes. The data
  would replicate across other nodes, so you can
  configure of how your data needs to be replicated
  and on how many nodes you want your data to be
  replicated. This concept is also called as data
  sharing or scaling. Where you can define of how
  your data needs to be split and store across the
  nodes in the cluster.
• The Characteristics of these nodes are
  independent to one another, even if one node goes
  down the other node will take up the right
  request on the read request from the Clint.Any
  node can accept the read and write request a
  respective of the master or slave, because Apache
  Cassandra is a master less application.
• A data replication and Cassandra nodes will be
  replicas for piece of data, so each piece of data
  would be replicated across the nodes. If each
  time when a data is searched out of the node, the
  Apache Cassandra would check whether the data is
  up-to-date its not it performs the read repair,
  if the data is out of the date

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Concept of Cassandra Cluster

• A Cluster in Cassandra is basically a collection
  of Nodes, a Nodes is actually an independent
  storage area connected in the form of a cluster.
  The cluster every node is connected to each
  other. The request can come from any client can
  be a Java application a Cassandra swift client or
  a a Cassandra CQL SH client or a web service or
  any application.
• It can send a request to a Cassandra cluster,
  there is node concept in Cassandra. So any node
  which is free to service any request will take up
  the new request. The node which takes the request
  becomes the coordinator node, a coordinator node
  will find out the node can service is this
  request.

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Features of Cassandra

• It is very highly scalable and it can scale
  horizontally to a very great extent, it means we
  want to increase the size of your cluster.
• It is does not provide decision directly however
  it can be used to make decisions
• Big data does not include unstructured data only,
  it also includes structured data that extends and
  complements unstructured data
• Big data is not a substitute for structured data,
  since most of the information on the internet is
  available to anyone.
• Apple.com has a Cassandra cluster of 75,000
  nodes, storing over 100 petabytes of data.
  Cassandra is a key-value NoSQL data store.
• Fault- tolerant considers a four node Cassandra
  cluster, in a cluster each node stores copies of
  same data based on replication factor.
• If the cluster node 4 is having a problem in this
  case three or three other nodes that can be
  serviced for our request from the application

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