A very categorized presentation about big data analytics Various topics like Introduction to Big Data,Hadoop,HDFS Map Reduce, Mahout,K-means Algorithm,H-Base are explained very clearly in simple language for everyone to understand easily.
This presentation Simplify the concepts of Big data and NoSQL databases & Hadoop components.
The Original Source:
http://zohararad.github.io/presentations/big-data-introduction/
View the Big Data Technology Stack in a nutshell. This Big Data Technology Stack deck covers the different layers of the Big Data world and summarizes the major technologies in vogue today.
This presentation Simplify the concepts of Big data and NoSQL databases & Hadoop components.
The Original Source:
http://zohararad.github.io/presentations/big-data-introduction/
View the Big Data Technology Stack in a nutshell. This Big Data Technology Stack deck covers the different layers of the Big Data world and summarizes the major technologies in vogue today.
Introduction to Data Science, Prerequisites (tidyverse), Import Data (readr), Data Tyding (tidyr),
pivot_longer(), pivot_wider(), separate(), unite(), Data Transformation (dplyr - Grammar of Manipulation): arrange(), filter(),
select(), mutate(), summarise()m
Data Visualization (ggplot - Grammar of Graphics): Column Chart, Stacked Column Graph, Bar Graph, Line Graph, Dual Axis Chart, Area Chart, Pie Chart, Heat Map, Scatter Chart, Bubble Chart
This is a power point presentation on Hadoop and Big Data. This covers the essential knowledge one should have when stepping into the world of Big Data.
This course is available on hadoop-skills.com for free!
This course builds a basic fundamental understanding of Big Data problems and Hadoop as a solution. This course takes you through:
• This course builds Understanding of Big Data problems with easy to understand examples and illustrations.
• History and advent of Hadoop right from when Hadoop wasn’t even named Hadoop and was called Nutch
• What is Hadoop Magic which makes it so unique and powerful.
• Understanding the difference between Data science and data engineering, which is one of the big confusions in selecting a carrier or understanding a job role.
• And most importantly, demystifying Hadoop vendors like Cloudera, MapR and Hortonworks by understanding about them.
This course is available for free on hadoop-skills.com
Big Data Analysis Patterns with Hadoop, Mahout and Solrboorad
Big Data Analysis Patterns: Tying real world use cases to strategies for analysis using big data technologies and tools.
Big data is ushering in a new era for analytics with large scale data and relatively simple algorithms driving results rather than relying on complex models that use sample data. When you are ready to extract benefits from your data, how do you decide what approach, what algorithm, what tool to use? The answer is simpler than you think.
This session tackles big data analysis with a practical description of strategies for several classes of application types, identified concretely with use cases. Topics include new approaches to search and recommendation using scalable technologies such as Hadoop, Mahout, Storm, Solr, & Titan.
An overview about several technologies which contribute to the landscape of Big Data.
An intro about the technology challenges of Big Data, follow by key open-source components which help out in dealing with various big data aspects such as OLAP, Real-Time Online
Analytics, Machine Learning on Map-Reduce. I conclude with an enumeration of the key areas where those technologies are most likely unleashing new opportunity for various businesses.
Introduction to Data Science, Prerequisites (tidyverse), Import Data (readr), Data Tyding (tidyr),
pivot_longer(), pivot_wider(), separate(), unite(), Data Transformation (dplyr - Grammar of Manipulation): arrange(), filter(),
select(), mutate(), summarise()m
Data Visualization (ggplot - Grammar of Graphics): Column Chart, Stacked Column Graph, Bar Graph, Line Graph, Dual Axis Chart, Area Chart, Pie Chart, Heat Map, Scatter Chart, Bubble Chart
This is a power point presentation on Hadoop and Big Data. This covers the essential knowledge one should have when stepping into the world of Big Data.
This course is available on hadoop-skills.com for free!
This course builds a basic fundamental understanding of Big Data problems and Hadoop as a solution. This course takes you through:
• This course builds Understanding of Big Data problems with easy to understand examples and illustrations.
• History and advent of Hadoop right from when Hadoop wasn’t even named Hadoop and was called Nutch
• What is Hadoop Magic which makes it so unique and powerful.
• Understanding the difference between Data science and data engineering, which is one of the big confusions in selecting a carrier or understanding a job role.
• And most importantly, demystifying Hadoop vendors like Cloudera, MapR and Hortonworks by understanding about them.
This course is available for free on hadoop-skills.com
Big Data Analysis Patterns with Hadoop, Mahout and Solrboorad
Big Data Analysis Patterns: Tying real world use cases to strategies for analysis using big data technologies and tools.
Big data is ushering in a new era for analytics with large scale data and relatively simple algorithms driving results rather than relying on complex models that use sample data. When you are ready to extract benefits from your data, how do you decide what approach, what algorithm, what tool to use? The answer is simpler than you think.
This session tackles big data analysis with a practical description of strategies for several classes of application types, identified concretely with use cases. Topics include new approaches to search and recommendation using scalable technologies such as Hadoop, Mahout, Storm, Solr, & Titan.
An overview about several technologies which contribute to the landscape of Big Data.
An intro about the technology challenges of Big Data, follow by key open-source components which help out in dealing with various big data aspects such as OLAP, Real-Time Online
Analytics, Machine Learning on Map-Reduce. I conclude with an enumeration of the key areas where those technologies are most likely unleashing new opportunity for various businesses.
Quickly, easily, and precisly remove red eye from your photos using Photoshop. You don't need to use a red eye removal tool to make your photo's eyes look great
A presentation and workshop presented at the 2009 Annual Conference of the American Planning Association, New Jersey Chapter. Originally presented at the Bloustein School, Rutgers-New Brunswick. Workshop materials available at http://njgeo.org/presentations/
Want to know how you are going to take an ordinary picture and intensify its colors in Photoshop. This write-up will help you know about it specifically.
Building a semantic-based decision support system to optimize the energy use ...Gonçal Costa Jutglar
The reduction of carbon emissions in cities is a systemic problem which involves multiple scales and domains and the collaboration of experts from various fields. The smart cities approach can contribute to improve the energy efficiency of urban areas provided that there is reliable data –from the different domains concerned with carbon emission reduction– to assess their energy performance and to make decisions to improve it. In the SEMANCO project, we applied Semantic Web technologies to solve the interoperability among data, systems, tools, and users in applications cases dealing with carbon emission reduction in urban areas. In the OPTIMUS project, the tools and methods developed in SEMANCO are being further enhanced and applied to the development of a decision support system (DSS) to help local administrations to optimize the energy use of public buildings.
I have collected information for the beginners to provide an overview of big data and hadoop which will help them to understand the basics and give them a Start-Up.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
In this paper, we discuss about the Big Data. We
analyze and reveals the benefits of Big Data. We analyze the
big data challenges and how Hadoop gives solution to it. This
research paper gives the comparison between relational
databases and Hadoop. This research paper also gives reason
of why Big Data and Hadoop.
General Terms
Data Explosion, Big Data, Big Data Analytics, Hadoop, Hadoop
Distributed File System, MapReduce
Big Data Serving with Vespa - Jon Bratseth, Distinguished Architect, OathYahoo Developer Network
Offline and stream processing of big data sets can be done with tools such as Hadoop, Spark, and Storm, but what if you need to process big data at the time a user is making a request? Vespa (http://www.vespa.ai) allows you to search, organize and evaluate machine-learned models from e.g TensorFlow over large, evolving data sets with latencies in the tens of milliseconds. Vespa is behind the recommendation, ad targeting, and search at Yahoo where it handles billions of daily queries over billions of documents.
this slide is for brief introduction to the big data with little bit of fun through memes.
it is prepared with the articles from different websites about big data and some of my own words so it would be great if you like it
A short presentation on big data and the technologies available for managing Big Data. and it also contains a brief description of the Apache Hadoop Framework
Hadoop was born out of the need to process Big Data.Today data is being generated liked never before and it is becoming difficult to store and process this enormous volume and large variety of data, In order to cope this Big Data technology comes in.Today Hadoop software stack is go-to framework for large scale,data intensive storage and compute solution for Big Data Analytics Applications.The beauty of Hadoop is that it is designed to process large volume of data in clustered commodity computers work in parallel.Distributing the data that is too large across the nodes in clusters solves the problem of having too large data sets to be processed onto the single machine.
Adjusting primitives for graph : SHORT REPORT / NOTESSubhajit Sahu
Graph algorithms, like PageRank Compressed Sparse Row (CSR) is an adjacency-list based graph representation that is
Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
Levelwise PageRank with Loop-Based Dead End Handling Strategy : SHORT REPORT ...Subhajit Sahu
Abstract — Levelwise PageRank is an alternative method of PageRank computation which decomposes the input graph into a directed acyclic block-graph of strongly connected components, and processes them in topological order, one level at a time. This enables calculation for ranks in a distributed fashion without per-iteration communication, unlike the standard method where all vertices are processed in each iteration. It however comes with a precondition of the absence of dead ends in the input graph. Here, the native non-distributed performance of Levelwise PageRank was compared against Monolithic PageRank on a CPU as well as a GPU. To ensure a fair comparison, Monolithic PageRank was also performed on a graph where vertices were split by components. Results indicate that Levelwise PageRank is about as fast as Monolithic PageRank on the CPU, but quite a bit slower on the GPU. Slowdown on the GPU is likely caused by a large submission of small workloads, and expected to be non-issue when the computation is performed on massive graphs.
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
2. There are some things that are so big that
they have implications for everyone,
whether we want it or not.
Big Data is one of those things, and is
completely transforming the way we do
business and is impacting most other
parts of our lives.
3.
4. From the dawn of civilization until
2003, humankind generated five
exabytes of data. Now we produce
five exabytes every two days…and
the pace is accelerating
Eric Schmidt,
Executive Chairman, Google
5. Activity Data
Conversation Data
Photo and Video Image Data
Sensor Data
The Internet of Things Data
6. Simple activities like listening to music or
reading a book are now generating data.
Digital music players and eBooks collect data
on our activities. Your smart phone collects
data on how you use it and your web
browser collects information on what you are
searching for. Your credit card company
collects data on where you shop and your
shop collects data on what you buy. It is hard
to imagine any activity that does not
generate data.
7. Our conversations are now digitally recorded.
It all started with emails but nowadays most
of our conversations leave a digital trail. Just
think of all the conversations we have on
social media sites like Facebook orTwitter.
Even many of our phone conversations are
now digitally recorded.
8. Just think about all the pictures we take on
our smart phones or digital cameras.We
upload and share 100s of thousands of them
on social media sites every second.The
increasing amounts of CCTV cameras take
video images and we up-load hundreds of
hours of video images toYouTube and other
sites every minute .
9. We are increasingly surrounded by sensors
that collect and share data.Take your smart
phone, it contains a global positioning sensor
to track exactly where you are every second
of the day, it includes an accelerometer to
track the speed and direction at which you
are travelling.We now have sensors in many
devices and products.
10. We now have smartTVs that are able to
collect and process data, we have smart
watches, smart fridges, and smart alarms.
The Internet ofThings, or Internet of
Everything connects these devices so that
e.g. the traffic sensors on the road send data
to your alarm clock which will wake you up
earlier than planned because the blocked
road means you have to leave earlier to make
your 9a.m meeting…
12. …refers to the vast amounts of data
generated every second.We are not talking
Terabytes but Zettabytes or Brontobytes. If
we take all the data generated in the world
between the beginning of time and 2008, the
same amount of data will soon be generated
every minute. New big data tools use
distributed systems so that we can store and
analyse data across databases that are dotted
around anywhere in the world.
13. …refers to the speed at which new data is
generated and the speed at which data
moves around. Just think of social media
messages going viral in seconds.Technology
allows us now to analyse the data while it is
being generated (sometimes referred to as
in-memory analytics), without ever putting it
into databases.
14. …refers to the different types of data we can
now use. In the past we only focused on
structured data that neatly fitted into tables or
relational databases, such as financial data. In
fact, 80% of the world’s data is unstructured
(text, images, video, voice, etc.)With big data
technology we can now analyse and bring
together data of different types such as
messages, social media conversations, photos,
sensor data, video or voice recordings.
15. …refers to the messiness or trustworthiness
of the data.With many forms of big data
quality and accuracy are less controllable
(just think ofTwitter posts with hash tags,
abbreviations, typos and colloquial speech as
well as the reliability and accuracy of content)
but technology now allows us to work with
this type of data.
16. LOGISTICAPPROACH OF BIG DATA FOR
CATEGORIZINGTECHNICAL SUPPORT
REQUESTS USING HADOOP AND MAHOUT
COMPONENTS.
17.
18. Social Media
Machine Log
Call Center Logs
Email
Financial Services transactions.
20. Revolution has created a series of
“RevoConnectRs for Hadoop” that will allow an
R programmer to manipulate Hadoop data
stores directly from HDFS and HBASE, and give
R programmers the ability to write MapReduce
jobs in R using Hadoop Streaming. RevoHDFS
provides connectivity from R to HDFS and
RevoHBase provides connectivity from R to
HBase. Additionally, RevoHStream allows
MapReduce jobs to be developed in R and
executed as Hadoop Streaming jobs.
21.
22. HDFS can be presented as a master/slave
architecture.Namenode is treated as master and
datanode the slave.Namenode is the server that
manages the filesystem namespace and adjust
the access to files by the client.It divides the
input data into blocks and announces which data
block will be stored in which datanode.Datanode
is the slave machine that stores the replicas of
the partition datasets and serves the data as the
request comes.It also performs block creation
and deletion
23. HDFS is managed with the master/slave
architecture included with the following
components:-
NAMENODE:-This is the master of the HDFS
system. It maintains the metadata and manages
the blogs that are present on datanodes.
DATANODE:-These are slaves that are deployed
on each machine and provide actual
storage.They are responsible for serving read
and write data request for the clients
24.
25. Map-reduce is a programming model for
processing and generating large datasets
.Users specify a map function that processes
a key value pair to generate a set of
intermediate key value pairs .
map(key1,value) -> list<key2,value2>
The reduce function that merges all
intermediate values associated with the same
intermediate key.
reduce(key2, list<value2>) -> list<value3>
26. The important innovation of map-reduce is the
ability to take a query over a dataset,divide it
,and run it in parallel over multiple nodes.
Distributing the computation solves the issue of
data too large to fit
onto a single machine. Combine this technique
with commodity Linux
servers and you have a cost-effective alternative
to massive computing
arrays.The advantage of map-reduce model is its
simplicity because only Map() and Reduce() to
be written by user.
27. Every organization’s data are diverse and particular to
their needs. However, there is much less diversity in the
kinds of analyses performed on that data.The Mahout
project is a library of Hadoop implementations of
common analytical computations. Use cases include user
collaborative filtering,user recommendations, clustering
and classification.
Mahout is an open source machine learning library built on
top of Hadoop to provide distributed analytics capabilities.
Mahout incorporates a wide range of data mining
techniques including collaborative filtering, classification
and clustering algorithms.
30. Clustering is the process of partitioning a group of data points into
a small number of clusters. For instance, the items in a
supermarket are clustered in categories (butter, cheese and milk
are grouped in dairy products). Of course this is a qualitative kind
of partitioning. A quantitative approach would be to measure
certain features of the products, say percentage of milk and
others, and products with high percentage of milk would be
grouped together. In general, we have n data points xi,i=1...nthat
have to be partitioned in k clusters.The goal is to assign a cluster
to each data point. K-means is a clustering method that aims to
find the positions ci,i=1...k of the clusters that minimize
the distance from the data points to the cluster. K-means
clustering solves
31.
32. There are several layers that sit on top of HDFS that
also provide additional capabilities and make working
with HDFS easier. One such implementation is
HBASE, Hadoop’s answer to providing database like
table structures.
Just like being able to work with HDFS from inside R,
access to HBASE helps open up the Hadoop
framework to the R programmer. Although R may not
be able to load a billion row-by-million-
column table, working with smaller subsets to
perform adhoc analysis can help lead to solutions that
work with the entire data set.
The H-Base data structure is based on LSMTrees.
33. The Log-Structured MergeTree:
The Log-Structured Merge-Tree (or LSM tree) is
a data structure with performance characteristics
that make it attractive for
providing indexed access to files with high insert
volume, such as transactional log data.
LSM trees, like other search trees, maintain key-value
pairs. LSM trees maintain data in two or more separate
structures, each of which is optimized for its respective
underlying storage medium.
34. All puts (insertions) are
appended to a write ahead
log (can be done fast on
HDFS, can be used to
restore the database in
case anything goes wrong)
An in memory data
structure (MemStore)
stores the most
recent puts (fast and
ordered)
From time to time
MemStore is flushed to
disk.
35. This results in a many small
files on HDFS.
HDFS better works with few
large files instead of many
small ones.
A get or scan potentially has
to look into all small files. So
fast random reads are not
possible as described so far.
That is why H-Base
constantly checks if it is
necessary to combine several
small files into one larger one
This process is called
compaction
36. There are two different kinds of compactions.
Minor Compactions merge few small ordered
files into one larger ordered one without
touching the data.
Major Compactions merge all files into one
file. During this process outdated or deleted
values are removed.
Bloom Filters (stored in the Metadata of the
files on HDFS) can be used for a fast exclusion
of files when looking for a specific key.
37. Every entry in a Table is indexed
by a RowKey
For every RowKey an unlimited
number of attributes can be
stored in Columns
There is no strict schema with
respect to the Columns.
New Columns can be added
during runtime
H-Base Tables are sparse.A
missing value doesn’t need any
space
Different versions can be stored
for every attribute. Each with a
different Timestamp.
Once a value is written to H-
Base it cannot be changed.
Instead another version with a
more recent Timestamp can be
added.
38. To delete a value from H-Base
a Tombstone value has to be
added.
The Columns are grouped
into ColumnFamilies.The Colum
nFamilies have to be defined at
table creation time and can’t be
changed afterwards.
H-Base is a distributed system. It
is guaranteed that
all values belonging to the
same RowKey and
ColumnFamily are stored
together.
39. Alternatively HBase can also be seen as a sparse,
multidimensional, sorted map with the following
structure:
(Table, RowKey, ColumnFamily, Column, Time
stamp) → Value
Or in an object oriented way:
Table ← SortedMap<RowKey, Row>
Row ← List<ColumnFamily>
ColumnFamily ← SortedMap<Column,
List<Entry>>
Entry ←Tuple<Timestamp,Value>
40. HBase supports the following operations:
Get: Returns the values for a given RowKey. Filters can
be used to restrict the results to specific
ColumnFamilies, Columns or versions.
Put: Adds a new entry.TheTimestamp can be set
automatically or manually.
Scan: Returns the values for a range of
RowKeys. Scans are very efficient in HBase. Filters can
also be used to narrow down the results. HBase 0.98.0
(which was released last week) also allows
backward scans.
Delete: Adds aTombstone marker.
41. HBase is a distributed database
The data is partitioned based on the
RowKeys into Regions.
Each Region contains a range of
RowKeys based on their binary
order.
A RegionServer can contain several
Regions.
All Regions contained in a
RegionServer share one write ahead
log (WAL).
Regions are automatically split if
they become too large.
Every Region creates a Log-
Structured MergeTree for every
ColumnFamily.That’s why fine
tuning like compression can be done
on ColumnFamily level.This should
be considered when defining the
ColumnFamilies.
42. HBase uses ZooKeeper to manage all
required services.
The assignment of Regions to
RegionServers and the splitting of Regions
is managed by a separate service, the
HMaster
The ROOT and the META table are two
special kinds of HBase tables which are
used for efficiently identifying which
RegionServer is responsible for a specific
RowKey in case of a read or write request.
When performing a get or scan, the client
asks ZooKeeper where to find the ROOT
Table.Then the client asks the ROOTTable
for the correct METATable. Finally it can
ask the METATable for the correct
RegionServer.
The client stores information about ROOT
and METATables to speed up future
lookups.
Using these three layers is efficient for a
practically unlimited number of
RegionServers.
43. Does HBase fulfill all “new” requirements?
Volume: By adding new servers to the cluster
HBase scales horizontally to an arbitrary amount
of data.
Variety:The sparse and flexible table structure is
optimal for multi-structured data. Only the
ColumnFamilies have to be predefined.
Velocity: HBase scales horizontally to read or
write requests of arbitrary speed by adding new
servers.The key to this is the LSM-Tree
Structure.